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MITSUBISHI MR527312 WHEEL SPEED SENSOR (ABS)

MITSUBISHI MR527312 WHEEL SPEED SENSOR (ABS)

Product Specifications

Product quality
OEM Equivalent Grade
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Wholesale price USD $2.84
Wholesale price CNY ¥19.2
bolt MOQ (Minimal order)
1 pcs
local_shipping Production time
1 days
package_2 Shipping Weight: —
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MITSUBISHI MR527312
QUATTRO FRENI QF60F00149
Overview & Operating Principle
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The wheel speed sensor is a fundamental component in vehicle safety systems, serving as input device for anti-lock braking, traction control, and electronic stability programs. This magneto-resistive sensor mounts at the front wheel hub assembly, maintaining proximity to a toothed reluctor ring integrated into the hub bearing. Through magnetic field monitoring, the sensor generates precise electrical signals corresponding to wheel rotational velocity.

The operational principle relies on magnetic flux variation detection. As the wheel rotates, alternating ferromagnetic teeth and air gaps of the reluctor ring pass the sensor tip, inducing voltage changes in the internal sensing element. Modern magneto-resistive sensors produce stable digital signal output from zero vehicle speed, enabling enhanced functionality during low-speed maneuvering and parking scenarios.

The electrical signal travels through a two-wire harness to the ABS control unit, which analyzes speed data from all wheels simultaneously. During braking events, the ECU monitors for speed differential patterns indicating potential wheel slip. When significant rotational speed discrepancy is detected, the control unit initiates rapid hydraulic pressure modulation, preventing wheel lock-up and maintaining directional stability.

Beyond ABS functionality, wheel speed sensor data feeds traction control and stability systems. Traction control detects driven wheel spin during acceleration and reduces engine torque or applies selective braking. Electronic stability control compares wheel speeds with steering angle and yaw rate to detect and correct understeer or oversteer.

Critical to proper operation is maintenance of the designed air gap between sensor tip and reluctor ring surface, typically 0.5 to 1.5 millimeters. Excessive clearance weakens magnetic field coupling. Contamination from ferromagnetic brake dust disrupts magnetic field patterns. Corrosion at the electrical connector, moisture intrusion, or wiring harness damage are common failure mechanisms producing intermittent signal loss.

Symptoms & Diagnostics
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Common Failure Symptoms:

ABS warning lamp illuminated continuously on instrument cluster from ignition through entire drive cycle.
Traction control system malfunction indicator active; traction intervention does not occur during wheel spin on slippery surfaces.
Electronic stability control disabled with corresponding dashboard warning; stability intervention absent during cornering.
Complete loss of anti-lock braking function; wheels lock and skid under heavy braking without ABS pedal pulsation.
Intermittent warning lamp activation correlated with temperature changes, rough pavement, or moisture exposure.
Speedometer erratic behavior or complete failure in configurations where wheel speed sensors provide primary speed signal input.

Diagnostic Trouble Codes (OBD-II):

C0035
Left front wheel speed sensor circuit malfunction — signal missing, erratic, or outside expected parameters.
C0040
Right front wheel speed sensor circuit malfunction — ECU receiving no signal or intermittent signal from front right position.
C0045
Left rear wheel speed sensor circuit malfunction — signal loss from rear left sensor position.
C0050
Right rear wheel speed sensor circuit malfunction — ECU cannot verify signal from rear right wheel.
C1201
ABS control module internal fault or communication error — may be triggered by prolonged operation with defective sensor.
C0710
Traction control function disabled due to wheel speed sensor fault — system cannot calculate wheel slip percentage.
C1095
ABS hydraulic pump motor circuit failure — secondary fault triggered when system attempts compensation for invalid speed data.
U0121
Lost communication with ABS control module — may indicate power supply fault or damaged CAN bus wiring.
C0221
Wheel speed sensor signal comparison fault — speed differential exceeds threshold during straight-line driving.

Professional diagnostic procedures include oscilloscope analysis of sensor output waveform to verify signal amplitude and frequency consistency. Digital multimeter resistance testing between sensor terminals should indicate 0.8 to 1.5 kiloohms for functional sensors. Complete absence of resistance indicates open circuit; near-zero resistance suggests internal short circuit.

Logistics & Customs Information
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HS Code (International):
8708.99 (Parts and accessories of motor vehicles)
EAEU TN VED Code:
8708 99 970 0 (Other parts and accessories for motor vehicles)
Net Weight:
Approximately 0.10 – 0.20 kg per sensor unit including connector and wiring harness
Country of Origin:
People’s Republic of China
Manufacturer Brand:
QUATTRO FRENI (Aftermarket OEM-equivalent quality grade)
Packaging:
Individual protective packaging with anti-static bag and foam cushioning; export carton with barcode labeling
Customs Description:
Automotive wheel speed sensor for anti-lock braking system; electronic safety component
Hazardous Material:
Non-hazardous; not subject to dangerous goods transportation regulations

Final customs classification and applicable duty rates are determined by the customs authority of the importing country. Importers should consult with licensed customs brokers for country-specific requirements.

Vehicle Compatibility
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BrandModelYearsPositionKey OEM Ref.
MitsubishiLancer2002 – 2007Front RightMR527312
Important: This sensor is designed for front right wheel position installation. Vehicle compatibility is based on verified OEM cross-reference number MR527312. Fitment may vary based on specific vehicle production date, market region, and factory equipment packages. Always verify the original part number from your vehicle before ordering.
Installation Tips
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1.Position vehicle on level surface and engage parking brake. Loosen front wheel lug nuts one turn using 21 mm socket before raising vehicle. Support on jack stands rated for vehicle weight.
2.Remove front right wheel assembly. Clean wheel mounting surface and inspect brake components for wear.
3.Locate front right wheel speed sensor on steering knuckle. Sensor is secured with single 10 mm bolt. Photograph wiring routing before disassembly.
4.Apply penetrating lubricant to sensor bolt and body. Allow 15–20 minutes penetration time before removal.
5.Disconnect electrical connector. Inspect terminals for corrosion. Clean with electrical contact cleaner and apply dielectric grease.
6.Remove sensor mounting bolt using 10 mm socket. If seized, apply heat carefully. Extract sensor by pulling firmly along mounting axis.
7.Clean sensor mounting bore using wire brush. Inspect reluctor ring for missing teeth or metallic debris.
8.Clean reluctor ring surface with brake cleaner. Verify teeth are sharp without mushrooming or damage.
9.Apply thin coat of high-temperature grease to new sensor body. Do not apply grease to sensor tip or reluctor ring.
10.Insert new sensor ensuring full seating. Tighten mounting bolt to 8–12 Nm (6–9 ft-lb) using torque wrench.
11.Route wiring harness through original mounting clips. Verify adequate slack for suspension travel.
12.Reconnect electrical connector ensuring audible click. Tug test to confirm secure connection.
13.Reinstall front wheel. Torque lug nuts to 100–120 Nm (80–90 ft-lb) in star pattern after lowering vehicle.
14.Clear diagnostic codes using OBD-II scan tool. Navigate to ABS system and select code clearing function.
15.Perform road test at speeds exceeding 30 km/h for 3–5 kilometers. Warning lamps should extinguish automatically. Test ABS activation by controlled hard braking.

Critical Safety Notice: If ABS warning lamp remains illuminated after installation and test drive, immediately recheck sensor seating, connector engagement, wiring routing, and part number verification. Scan for new diagnostic codes. Persistent warning indicates incomplete repair. Operating vehicle with non-functional ABS significantly reduces braking safety. Do not ignore persistent warning indications.

Frequently Asked Questions
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Q1: Is this sensor compatible with all Mitsubishi Lancer variants from 2002-2007?
Yes, this front right wheel speed sensor is compatible with Mitsubishi Lancer models from 2002-2007. The ABS sensor installation is independent of engine type or trim level as it mounts to the front steering knuckle. However, always verify your original part number matches MR527312 before ordering to ensure correct fitment for your specific vehicle configuration.
Q2: Does this wheel speed sensor require programming or calibration after installation?
No programming or calibration is required. This passive magneto-resistive sensor generates analog voltage signals based on reluctor ring rotation. The ABS control module automatically recognizes the sensor signal once electrical connection is established. Installation completion requires only clearing stored diagnostic codes using a standard OBD-II scan tool. After code clearing, drive the vehicle 3–5 kilometers above 30 km/h to allow the module to verify sensor function and extinguish warning lamps.
Q3: How does this aftermarket QUATTRO FRENI sensor compare to genuine Mitsubishi OEM parts in quality?
QUATTRO FRENI manufactures this sensor to OEM-equivalent specifications using comparable magnetic sensing elements and environmental sealing standards. The sensor utilizes magneto-resistive technology identical to Mitsubishi OEM designs. While genuine Mitsubishi OEM sensors carry factory warranty, quality aftermarket alternatives like QUATTRO FRENI offer cost savings of 40–60% below dealer pricing while delivering functionally equivalent performance. Quality aftermarket sensors typically provide reliable service life of 100,000–150,000 kilometers under normal operating conditions.
Q4: What should I do if the ABS warning light remains on after installing the new sensor and clearing codes?
First, verify the sensor is fully seated with proper bolt torque. Disconnect and reconnect the electrical connector to ensure full engagement. Use an OBD-II scanner to retrieve current diagnostic codes. Common causes of persistent warnings include: damaged reluctor ring on hub bearing, incorrect air gap, pinched wiring harness, corroded connector terminals, or incorrect sensor variant installed. Measure sensor resistance between terminals which should read 0.8–1.5 kiloohms; readings outside this range indicate defective sensor. If sensor tests correctly but warning persists, professional diagnosis may be required.
Q5: Can this product be supplied with white-label packaging or private branding for wholesale distribution?
Yes, custom packaging and private label branding options are available for qualified wholesale buyers meeting minimum order quantity requirements. Available customization includes custom printed boxes with your company branding, branded product labels in multiple languages, and SKU barcode integration. QUATTRO FRENI supports packaging programs for automotive parts distributors and e-commerce retailers. Custom packaging programs typically require minimum order quantities of 500–1,000 units per SKU. Lead time for custom packaging is generally 20–30 business days beyond standard production. Contact the supplier directly to discuss branding requirements and volume pricing.
Frequently Replaced Together
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ComponentReason for Concurrent Replacement
Front Wheel Hub Bearing AssemblyFailed or worn front wheel bearings produce excessive play and vibration that damages the integrated reluctor ring, causing erratic wheel speed signals. Lateral runout from worn bearing races creates variable air gap between sensor and reluctor ring resulting in signal amplitude fluctuation. When diagnosing persistent sensor problems despite sensor replacement, worn hub bearings are frequently the root cause. Replacing hub bearing assembly during sensor service eliminates reluctor ring damage and prevents recurring sensor failures.
Prevents reluctor ring damage; eliminates signal instability from bearing play
Front Brake Pads and RotorsWheel speed sensor replacement requires wheel removal providing direct access to brake components for inspection. Metallic brake dust from deteriorating pads is a leading cause of sensor contamination, forming conductive deposits on sensor tip that disrupt magnetic field sensing. Severely worn brake pads produce excessive dust that accelerates sensor fouling. Replacing brake pads and machining or replacing rotors during sensor service eliminates primary contamination source and extends new sensor service life.
Eliminates metallic contamination source; efficient combined service
ABS Hydraulic Control ModuleProlonged operation with defective wheel speed sensor forces the ABS hydraulic control unit to operate abnormally, rapidly cycling solenoid valves attempting to compensate for invalid or missing speed data. This excessive valve actuation causes premature wear of solenoid coils, valve seats, and hydraulic seals. If multiple sensors have failed within short time period or ABS warning persists after sensor replacement with codes indicating hydraulic faults, ABS module testing or replacement may be necessary to restore complete system functionality.
Addresses secondary damage from sensor fault compensation cycles
Battery and Alternator SystemWeak battery voltage or unstable alternator output produces erratic ABS sensor behavior as magneto-resistive sensors require stable electrical power supply. System voltage fluctuations below 11.5V during cranking can trigger false sensor circuit faults. Intermittent voltage drops cause ABS module to store spurious codes incorrectly indicating sensor failure. Testing battery cranking voltage, alternator output regulation, and charging system ripple during sensor diagnosis prevents misdiagnosis and unnecessary sensor replacement.
Ensures stable power supply; prevents false sensor fault codes
Sensor Wiring Harness and ConnectorCorroded connector terminals, abraded wiring insulation, or broken wire strands are common causes of wheel speed sensor circuit faults producing identical symptoms to sensor failure. Physical damage from road debris impact, improper routing near exhaust components, or age-related insulation brittleness creates intermittent open circuits or short circuits. Connector terminal corrosion from moisture intrusion degrades electrical contact resistance and signal quality. When sensor signal problems are diagnosed, thoroughly inspect complete wiring harness from sensor to ABS module.
Eliminates intermittent electrical connection failures; prevents misdiagnosis