SENSOR WHEEL SPEED

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Operating Principle</div> <div class="b-chevron open" id="qf-chevron-b1">&#9650;</div> </div> <div class="b-body open" id="qf-body-b1"> <p class="qf-intro-lead">The <strong>Hyundai/Kia 956701R000</strong> (also written as 95670-1R000) is the <strong>Front Left (Driver Side) ABS Wheel Speed Sensor</strong> fitted to the <strong>Hyundai Accent RB (4th generation), 2012-2017</strong> with 1.4L G4FA, 1.6L G4FC, and 1.6L G4FG (GDI) engine variants. The component is an active Hall-effect digital sensor with integrated wiring harness and 2-pin blade-type male connector, mounted on the front left steering knuckle / spindle. The sensor reads the magnetic encoder ring integrated into the inner wheel bearing seal and produces a digital square-wave signal proportional to wheel rotational speed for the ABS control module, traction control system (TCS), and electronic stability control (ESC).</p> <div class="qf-info-box"><strong>Front LEFT position only.</strong> The 956701R000 is specifically the driver-side front sensor. The opposite side (passenger / front right) uses a different mirror-image reference <strong>956711R000</strong>; rear sensors use <strong>956801R100</strong> (rear left) and <strong>956811R100</strong> (rear right). These four sensors are NOT interchangeable &mdash; each position has unique cable routing length and connector orientation. Always match the diagnostic code's identified wheel position to the correct sensor reference before ordering.</div> <div class="qf-spec-row"> <div class="qf-spec-item"><div class="qf-spec-label">Brand part number</div><div class="qf-spec-value">Hyundai/Kia 956701R000 (95670-1R000)</div></div> <div class="qf-spec-item"><div class="qf-spec-label">Component type</div><div class="qf-spec-value">ABS Wheel Speed Sensor (Anti-Lock Braking System)</div></div> <div class="qf-spec-item"><div class="qf-spec-label">Sensor type</div><div class="qf-spec-value">Active Hall-effect, digital square wave output</div></div> <div class="qf-spec-item"><div class="qf-spec-label">Position</div><div class="qf-spec-value">Front Left (Driver Side)</div></div> <div class="qf-spec-item"><div class="qf-spec-label">Mounting location</div><div class="qf-spec-value">Steering knuckle / spindle, single retaining bolt</div></div> <div class="qf-spec-item"><div class="qf-spec-label">Connector type</div><div class="qf-spec-value">2-pin blade-type male connector, integrated wiring harness</div></div> </div> <div class="qf-sub-head">OEM Cross-References</div> <div class="qf-cross-grid"> <div class="qf-cross-card"><div class="qf-cross-brand">Hyundai/Kia Genuine</div><div class="qf-cross-num">956701R000</div><div class="qf-cross-status">&#10003; Primary OEM reference (compact format)</div></div> <div class="qf-cross-card"><div class="qf-cross-brand">Hyundai/Kia (hyphenated)</div><div class="qf-cross-num">95670-1R000</div><div class="qf-cross-status">&#10003; Hyphenated OEM catalog notation</div></div> <div class="qf-cross-card"><div class="qf-cross-brand">Standard Motor Products</div><div class="qf-cross-num">ALS2330</div><div class="qf-cross-status">&#10003; North American aftermarket reference</div></div> <div class="qf-cross-card"><div class="qf-cross-brand">Dorman</div><div class="qf-cross-num">5S14065</div><div class="qf-cross-status">&#10003; Dorman aftermarket catalog number</div></div> <div class="qf-cross-card"><div class="qf-cross-brand">Partslink</div><div class="qf-cross-num">HY31036</div><div class="qf-cross-status">&#10003; Partslink interchange reference</div></div> </div> <div class="qf-sub-head">Operating Principle</div> <p class="qf-para">The active Hall-effect ABS sensor architecture works in conjunction with the magnetic encoder ring integrated into the wheel bearing inner seal. As the wheel rotates, the encoder ring's magnetic poles pass the Hall element inside the sensor; the Hall element switches state with each pole transition, producing a digital square-wave signal at frequency proportional to wheel rotational speed. Compared to older passive magnetic (reluctor-based) sensors, the active Hall design has three operational advantages: <strong>(1) signal accuracy at low speed</strong> &mdash; produces clean signal from near-zero speed, enabling ABS function during low-speed wheel-lock events on slippery surfaces; <strong>(2) air gap tolerance</strong> &mdash; less sensitive to mounting position variation; <strong>(3) digital noise immunity</strong> &mdash; immune to electromagnetic interference from other vehicle electrical systems.</p> <p class="qf-para">The signal is processed by the ABS / ESC control module, which compares wheel speed values across all four corners to detect: <strong>(a) wheel lock-up</strong> during braking (ABS function); <strong>(b) wheel slip</strong> during acceleration (TCS function); <strong>(c) yaw rate discrepancy</strong> during cornering compared to steering angle and lateral acceleration sensor inputs (ESC function); <strong>(d) vehicle speed</strong> for speedometer display and automatic transmission shift scheduling on some Accent variants. The 2-pin connector carries supply voltage (typically 12V or regulated 8V from the ABS module) and signal return (digital square wave output).</p> <p class="qf-para">Three primary failure mechanisms: <strong>(1) connector corrosion</strong> &mdash; the connector at the inner fender mounting point is exposed to wheel-arch moisture, road salt, and debris; corrosion produces intermittent signal loss; <strong>(2) cable chafing or breakage</strong> &mdash; the wiring harness routes along the steering knuckle and suspension where it can contact the CV joint, brake caliper, or suspension components if mis-routed; <strong>(3) Hall element failure</strong> &mdash; permanent damage from excessive heat, voltage spike, or physical impact. <strong>Encoder ring damage</strong> on the wheel bearing inner seal (from age, contamination, or bearing failure) produces identical symptoms to sensor failure; always inspect bearing condition during sensor replacement.</p> </div> </div> </div> <div class="qf-block"> <div class="b-section"> <div class="b-header" onclick="qfToggle('b2')"> <div class="b-title">Symptoms &amp; Diagnostics</div> <div class="b-chevron open" id="qf-chevron-b2">&#9650;</div> </div> <div class="b-body open" id="qf-body-b2"> <div class="qf-symptom"><strong>ABS, TCS, and ESC warning lights illuminated simultaneously</strong> &mdash; All three systems share the same wheel speed data; a single sensor failure disables all three safety systems at once. <strong>Characteristic indicator</strong>: three warning lights at the same time = wheel speed sensor fault rather than a brake system or engine problem. Service braking continues to function normally without ABS intervention.</div> <div class="qf-symptom"><strong>Stored DTCs C0035 / C1200 / C0036 / C1201 / C0037 / C1202 / C0045</strong> &mdash; Front left wheel speed sensor codes. <strong>C0035 / C1200</strong>: sensor circuit fault (open or short in wiring, failed sensor, corroded connector). <strong>C0036 / C1201</strong>: sensor performance (erratic signal from damaged encoder ring, excessive air gap, sensor face contamination). <strong>C0037 / C1202</strong>: signal missing (complete signal loss, broken wire, destroyed encoder ring). <strong>C0045</strong>: signal erratic (intermittent fault, partial harness damage, cracked encoder).</div> <div class="qf-symptom"><strong>ABS pulsation at low speed on dry roads during normal braking</strong> &mdash; Intermittent sensor producing erratic signals causes ABS module to falsely detect wheel lock-up. Driver feels unexpected brake pedal pulsation at 5-15 km/h during routine braking. Safety hazard: drivers may incorrectly diagnose this as a brake system fault and delay sensor service.</div> <div class="qf-symptom"><strong>Speedometer error or zero reading</strong> &mdash; Some Hyundai Accent variants derive the speedometer signal from ABS sensor data rather than a dedicated VSS. Failed front left sensor may cause erratic / zero speedometer readings. Vehicle speed-dependent functions (cruise control, auto-locking doors) may behave erratically.</div> <div class="qf-symptom"><strong>Harsh or delayed automatic transmission shifts</strong> &mdash; The TCU on automatic-transmission Accent variants uses wheel speed data for shift scheduling. Missing data from one wheel causes the transmission to adopt a protective shift strategy with firmer, delayed shifts.</div> <div class="qf-symptom"><strong>No fault codes but ABS light returns after wheel bearing service</strong> &mdash; New wheel bearing's integrated encoder ring may be misaligned to sensor face, or sensor air gap is outside specification. Verify bearing installation orientation and confirm sensor seats fully against knuckle shoulder.</div> <div class="qf-info-box"><strong>Diagnosis sequence:</strong> (1) <strong>Scan tool with ABS module access</strong> &mdash; read stored DTCs; basic OBD-II readers may not retrieve C0xxx ABS-specific codes. Confirm code points to front LEFT (C0035 / C1200 series). (2) <strong>Visual inspection</strong> &mdash; raise vehicle, remove front left wheel, inspect wiring harness for chafing near CV joint / knuckle / inner fender. Check connector for green/white corrosion deposits. (3) <strong>Continuity test</strong> &mdash; disconnect sensor connector, check for open circuit between signal pins; infinite resistance confirms broken wire or destroyed sensor element. (4) <strong>Encoder ring inspection</strong> &mdash; rotate wheel hub, visually inspect magnetic encoder ring on bearing inner seal for damage, delamination, or contamination with metallic debris. (5) <strong>Live data comparison</strong> &mdash; monitor all four wheel speed signals while rotating front left wheel by hand; healthy sensor produces smooth, consistent reading matching opposite side at similar rotation speed. (6) <strong>If sensor confirmed faulty and encoder ring intact</strong> &mdash; replace sensor with new 956701R000.</div> </div> </div> </div> <div class="qf-block"> <div class="b-section"> <div class="b-header" onclick="qfToggle('b3')"> <div class="b-title">Logistics &amp; Customs</div> <div class="b-chevron open" id="qf-chevron-b3">&#9650;</div> </div> <div class="b-body open" id="qf-body-b3"> <table class="qf-logistics-table"> <tr><td>International HS Code</td><td>8543.70</td></tr> <tr><td>EAEU Customs Code (TN VED)</td><td>8543 70 900 9</td></tr> <tr><td>Country of Manufacture</td><td>China</td></tr> <tr><td>Quality standard</td><td>IATF 16949</td></tr> <tr><td>Hazardous goods</td><td>No</td></tr> <tr><td>Shipping weight per piece</td><td>0.1 kg (100 grams)</td></tr> <tr><td>Packaging</td><td>Individual sealed blister pack with part label and protective foam for harness; bulk wholesale packaging available</td></tr> </table> <p style="font-size:12px;color:#888;margin-top:12px;font-style:italic">Electrical machines and apparatus with individual functions, including automotive Hall-effect sensors, are classified under <strong>HS 8543.70</strong> (electrical machines having individual functions). Confirm exact 10-digit subheading with your customs broker. Commercial invoice description: active Hall-effect ABS wheel speed sensor with integrated wiring harness and 2-pin connector, for automotive anti-lock braking, traction control, and electronic stability control system, front left position passenger vehicle application.</p> </div> </div> </div> <div class="qf-block"> <div class="b-section"> <div class="b-header" onclick="qfToggle('b4')"> <div class="b-title">Vehicle Compatibility</div> <div class="b-chevron open" id="qf-chevron-b4">&#9650;</div> </div> <div class="b-body open" id="qf-body-b4"> <div class="qf-info-box"><strong>Hyundai Accent RB (4th generation), 2012-2017 production years, front left position only.</strong> Verified compatibility across all 4th-generation engine variants:</div> <table class="qf-compat-table"> <thead><tr><th>Vehicle</th><th>Years &amp; engine variants</th></tr></thead> <tbody> <tr><td>Hyundai Accent RB (4th gen) sedan</td><td>2012-2017, 1.6L L4 G4FC engine (MPI), front left position</td></tr> <tr><td>Hyundai Accent RB (4th gen) hatchback</td><td>2012-2017, 1.6L L4 G4FG engine (GDI variant), front left position</td></tr> <tr><td>Hyundai Accent RB (4th gen) base variants</td><td>2011-2017, 1.4L L4 G4FA engine, front left position</td></tr> </tbody> </table> <p style="font-size:12px;color:#888;margin-top:10px;font-style:italic">Does NOT fit: <strong>Hyundai Accent LC (2nd gen, 1999-2006)</strong> &mdash; older platform with different sensor reference; <strong>Hyundai Accent MC (3rd gen, 2006-2011)</strong> &mdash; transition generation, different sensor system; <strong>Hyundai Accent HC (5th gen, 2018+)</strong> &mdash; new platform with updated sensor reference, NOT compatible; <strong>Kia Rio</strong> &mdash; shares the RB platform with Accent but may use a different sensor reference depending on market; always verify by OEM number, not by platform similarity. <strong>Front RIGHT (passenger) position</strong> &mdash; use 956711R000 mirror-image counterpart; cable routing and connector orientation differ. <strong>Rear positions</strong> &mdash; use 956801R100 (rear left) or 956811R100 (rear right). Always verify by reading existing sensor part number stamping or checking Hyundai parts catalog by VIN before ordering. Some Hyundai Accent variants with stability control delete (low-trim variants in certain markets) may have a different harness configuration; standard ABS-equipped variants use this reference universally.</p> </div> </div> </div> <div class="qf-block"> <div class="b-section"> <div class="b-header" onclick="qfToggle('b5')"> <div class="b-title">Installation Tips</div> <div class="b-chevron open" id="qf-chevron-b5">&#9650;</div> </div> <div class="b-body open" id="qf-body-b5"> <p class="qf-para" style="margin-bottom:14px">Difficulty: <strong>Easy.</strong> Estimated time: 30&#8211;45 minutes. Direct plug-and-play replacement &mdash; no splicing, no calibration, no ECU coding required. Standard tools sufficient.</p> <ol class="qf-steps"> <li><div class="qf-step-num">1</div><div class="qf-step-text"><strong>Vehicle safely raised and supported</strong> on rated jack stand at front left lift point. Front left wheel removed for access. Engage parking brake; chock rear wheels.</div></li> <li><div class="qf-step-num">2</div><div class="qf-step-text"><strong>Disconnect sensor connector</strong> at harness clip point on the inner fender or subframe. Release locking tab carefully &mdash; brittle plastic connectors on high-mileage vehicles break easily. <strong>If corroded</strong>: apply electrical contact cleaner before separation; forcing brittle connector breaks it.</div></li> <li><div class="qf-step-num">3</div><div class="qf-step-text"><strong>Release harness clips</strong> along the knuckle and suspension. <strong>Note exact original routing</strong> &mdash; new sensor must follow the same path to avoid contact with CV joint, brake caliper, or steering components during full lock-to-lock and full suspension travel.</div></li> <li><div class="qf-step-num">4</div><div class="qf-step-text"><strong>Remove the sensor retaining bolt</strong> on the steering knuckle (10mm socket). <strong>If sensor is seized in the bore</strong>: do NOT pry with screwdriver (damages bore). Apply penetrating oil; tap sensor body gently with plastic mallet or use sensor extraction tool.</div></li> <li><div class="qf-step-num">5</div><div class="qf-step-text"><strong>Pull old sensor straight out of bore</strong> &mdash; do not rotate / twist. Clean bore with wire brush to remove rust and debris; bore must be clean and dry for new sensor to seat fully.</div></li> <li><div class="qf-step-num">6</div><div class="qf-step-text"><strong>Inspect the magnetic encoder ring</strong> on the wheel bearing inner seal &mdash; rotate hub by hand, look for cracks, delamination, or contamination with metallic debris from worn brake components. Damaged encoder ring will produce ABS faults with new sensor; replace wheel bearing if encoder damage confirmed.</div></li> <li><div class="qf-step-num">7</div><div class="qf-step-text"><strong>Compare new 956701R000 to old</strong> &mdash; verify body shape, connector type (2-pin blade male), cable length, and harness clip positions match. Confirm part number on label.</div></li> <li><div class="qf-step-num">8</div><div class="qf-step-text"><strong>Slide new sensor straight into the bore</strong> until it seats fully against the knuckle shoulder. Should slide in smoothly. If it does not seat fully, clean bore again &mdash; do not force the sensor.</div></li> <li><div class="qf-step-num">9</div><div class="qf-step-text"><strong>Install retaining bolt and torque to 8-12 Nm (6-9 ft-lb)</strong>. <strong>Do not over-torque</strong> &mdash; sensor body is plastic, knuckle thread is aluminum; over-torquing cracks sensor body or strips knuckle thread.</div></li> <li><div class="qf-step-num">10</div><div class="qf-step-text"><strong>Route and clip wiring harness</strong> following original routing exactly. Secure with all original clips. Verify cable clearance from CV boot, brake caliper, and steering components through full lock-to-lock and full suspension travel.</div></li> <li><div class="qf-step-num">11</div><div class="qf-step-text"><strong>Apply thin coat of dielectric grease to connector pins</strong> before reconnecting &mdash; prevents future corrosion (the leading cause of premature ABS sensor failure in road-salt environments). Reconnect connector with positive click engagement.</div></li> <li><div class="qf-step-num">12</div><div class="qf-step-text"><strong>Reinstall wheel, lower vehicle, and clear DTCs with OBD-II scanner</strong> with ABS module access. Start engine; drive above 30 km/h for 2-3 minutes &mdash; ABS module automatically validates all four sensor signals. Verify no warning lights return; check live data to confirm front left sensor produces clean, consistent signal matching the front right.</div></li> </ol> <div class="qf-tool-row"><strong>Tools required:</strong> Jack + axle stand rated for vehicle weight; 10mm socket and ratchet; torque wrench (5-15 Nm range); wire brush; electrical contact cleaner; dielectric grease; penetrating oil; plastic mallet or sensor extraction tool; OBD-II scanner with ABS module access; lint-free cloths; safety glasses + nitrile gloves; lug wrench for wheel removal.</div> </div> </div> </div> <div class="qf-block"> <div class="b-section"> <div class="b-header" onclick="qfToggle('b6')"> <div class="b-title">Frequently Asked Questions</div> <div class="b-chevron open" id="qf-chevron-b6">&#9650;</div> </div> <div class="b-body open" id="qf-body-b6"> <div class="qf-faq-item"> <div class="qf-faq-q"><span class="qf-faq-q-icon">Q</span>What is the difference between 956701R000 and 956711R000?</div> <div class="qf-faq-a"><strong>956701R000</strong> is the front <strong>LEFT</strong> (driver side) ABS sensor; <strong>956711R000</strong> is the front <strong>RIGHT</strong> (passenger side). They are mirror-image parts with different cable routing length and connector positions &mdash; <strong>NOT interchangeable</strong>. Cable routing on the 956701R000 follows the left knuckle and connects at the left inner fender; the 956711R000 follows the right knuckle and connects at the right inner fender. Always match the sensor side to the diagnostic code's identified wheel position before ordering &mdash; this is the most common mistake when ordering ABS sensors.</div> </div> <div class="qf-faq-item"> <div class="qf-faq-q"><span class="qf-faq-q-icon">Q</span>Is calibration or ECU adaptation required after installation?</div> <div class="qf-faq-a"><strong>No.</strong> Clear stored ABS / TCS / ESC fault codes with an OBD-II scanner after installation and drive above 30 km/h for 2-3 minutes. The ABS module self-validates all four sensor signals automatically &mdash; no ECU coding, adaptation, or calibration procedure is required. The sensor is a direct plug-and-play replacement.</div> </div> <div class="qf-faq-item"> <div class="qf-faq-q"><span class="qf-faq-q-icon">Q</span>Can a worn wheel bearing cause this sensor to fail?</div> <div class="qf-faq-a"><strong>Yes &mdash; common diagnostic issue</strong>. On the Hyundai Accent RB, the magnetic encoder ring is integrated into the wheel bearing inner seal. A worn bearing with damaged or delaminated encoder ring produces erratic ABS signals even with a brand-new sensor installed. <strong>Always inspect bearing play and encoder ring condition</strong> during ABS sensor service. If bearing is worn (visible play, audible rumble, or vibration when wheel is spun), replace bearing simultaneously with sensor &mdash; bearing reference <strong>517201R000</strong> for the front left position. Replacing only the sensor on a worn bearing produces a repeat fault within short interval.</div> </div> <div class="qf-faq-item"> <div class="qf-faq-q"><span class="qf-faq-q-icon">Q</span>Which diagnostic codes specifically point to this sensor?</div> <div class="qf-faq-a">C0035 / C1200 (front left circuit), C0036 / C1201 (front left performance), C0037 / C1202 (front left signal missing), C0045 (front left signal erratic). These codes are specific to the front left wheel. If the code references the front right wheel (C0040 series or C1203 series), the fault is with the 956711R000 RIGHT sensor, not this part. Hyundai uses both generic (C00xx) and manufacturer-specific (C12xx) code formats &mdash; both indicate the same faults. <strong>Use a scanner with ABS module access</strong>; basic OBD-II code readers may not retrieve ABS-specific C-codes.</div> </div> <div class="qf-faq-item"> <div class="qf-faq-q"><span class="qf-faq-q-icon">Q</span>Should both front sensors be replaced as a pair?</div> <div class="qf-faq-a"><strong>Recommended on high-mileage vehicles.</strong> On vehicles above 100,000 km where one sensor has failed from age and corrosion, the opposite side has identical mileage and thermal cycling and is likely to fail within similar interval. Replacing both front sensors (956701R000 LEFT + 956711R000 RIGHT) as a pair: avoids repeat service visit; eliminates asymmetric sensor age; and is a common workshop upsell. Order pair from ok.parts for wholesale efficiency. <strong>For comprehensive ABS system restoration on high-mileage vehicles</strong>: include rear sensors (956801R100 rear left + 956811R100 rear right) for complete 4-sensor refresh.</div> </div> <div class="qf-faq-item"> <div class="qf-faq-q"><span class="qf-faq-q-icon">Q</span>Is white-label or custom packaging available for wholesale orders?</div> <div class="qf-faq-a">Yes. ok.parts sources directly from manufacturing facility. White-label packaging with vehicle application label (Hyundai Accent RB 2012-2017 front left ABS sensor) available for wholesale distribution &mdash; suited to Hyundai/Kia specialist shops, multi-brand independent service centres, brake / ABS specialist distributors, and Amazon / online wholesale resellers. Mixed SKU consolidation with matching 956711R000 right front, 956801R100 rear left, 956811R100 rear right, and 517201R000 wheel bearing supported &mdash; the complete ABS system service kit is a strong wholesale proposition. Use Send Inquiry form for high-volume order discussion.</div> </div> </div> </div> </div> <div class="qf-block"> <div class="b-section"> <div class="b-header" onclick="qfToggle('b7')"> <div class="b-title">Frequently Replaced Together</div> <div class="b-chevron open" id="qf-chevron-b7">&#9650;</div> </div> <div class="b-body open" id="qf-body-b7"> <table class="qf-frt-table"> <thead><tr><th>Part</th><th>Reference</th><th>Reason for Combined Replacement</th></tr></thead> <tbody> <tr> <td>Front RIGHT ABS Sensor</td> <td>Hyundai/Kia 956711R000 (front right counterpart)</td> <td>Same age and mileage as the left sensor; likely approaching failure. Selling as a pair for complete front ABS restoration is a common workshop upsell, particularly on high-mileage vehicles. Aftermarket cross-reference: SMP ALS2339.</td> </tr> <tr> <td>Front Left Wheel Bearing</td> <td>Hyundai/Kia 517201R000 (front left wheel bearing with integrated encoder ring)</td> <td>The magnetic encoder ring is integrated into the wheel bearing inner seal. A worn bearing with damaged encoder ring will produce continued ABS faults even with a new sensor installed. Inspect bearing play and encoder ring condition during sensor replacement; if worn, replace simultaneously.</td> </tr> <tr> <td>Rear LEFT ABS Sensor</td> <td>Hyundai/Kia 956801R100 (rear left counterpart)</td> <td>On high-mileage vehicles with front sensor failure, rear sensors are also aging. Complete 4-sensor replacement ensures all ABS data is reliable for several years of subsequent service. Aftermarket cross-reference: SMP ALS2653.</td> </tr> <tr> <td>Rear RIGHT ABS Sensor</td> <td>Hyundai/Kia 956811R100 (rear right counterpart)</td> <td>Same rationale as rear left &mdash; complete set replacement for full system reliability. Aftermarket cross-reference: SMP ALS2654.</td> </tr> <tr> <td>Dielectric Grease and Electrical Contact Cleaner</td> <td>Standard automotive electrical service consumables</td> <td>Connector corrosion is the leading cause of premature ABS sensor failure in road-salt environments. Apply dielectric grease to pins before reconnection during sensor service to dramatically extend new sensor service life.</td> </tr> </tbody> </table> </div> </div> </div> </div> <script> function qfToggle(id){ document.getElementById('qf-body-'+id).classList.toggle('open'); document.getElementById('qf-chevron-'+id).classList.toggle('open'); } </script>