Catalog

BOSCH 0221504030 IGNITION COIL

BOSCH 0221504030 IGNITION COIL

Product Specifications

Product quality
OEM Equivalent Grade
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Wholesale price USD $7.08
Wholesale price CNY ¥48
bolt MOQ (Minimal order)
20 pcs
local_shipping Production time
43 days
package_2 Shipping Weight: —
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BOSCH 0221504030
BOSCH 8200699627
Overview & Operating Principle
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The IGNITION COIL is a high-voltage transformer that steps up the 12 V battery supply to the 20,000–40,000 V spark discharge required to ignite the air-fuel mixture in each cylinder. Modern pencil-type coil-on-plug (COP) units — the dominant design in current production vehicles — mount directly over the spark plug, eliminating the high-voltage lead and reducing energy loss. Each coil fires independently under ECU control, enabling precise per-cylinder ignition timing and misfire detection.

This unit — BOSCH 0221504030 — is manufactured to OEM-equivalent specifications: primary and secondary winding resistance, turn ratio, peak output voltage, and connector pinout are matched to the original part. Supplied as a direct plug-and-play replacement requiring no ECU recalibration for standard fitment. Available wholesale from 7.08 USD, MOQ 20 pcs, production lead time 43 days.

Ignition coils degrade gradually with heat cycling and mileage. A single failed coil on a multi-cylinder engine will cause a misfire on that cylinder only — always verify which cylinder is misfiring with a scanner before replacing the full set.

Symptoms & Diagnostics
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Check Engine light with misfire codes P0300–P030X — the digit after P030 identifies the misfiring cylinder.
Rough idle, hesitation, or surging under load — especially noticeable on cold start before the engine reaches operating temperature.
Hard start or extended cranking with no combustion on one or more cylinders.
Increased fuel consumption and elevated HC (hydrocarbon) emissions — unburned fuel passes through the misfiring cylinder into the exhaust.
Catalytic converter overheating — raw fuel igniting in the exhaust system; address misfire immediately to avoid converter damage.
Swapping the suspect coil to a different cylinder and confirming the misfire code follows the coil — the fastest diagnostic method before ordering a replacement.
Logistics & Customs
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International HS Code
8511.80
EAEU Customs Code (TN VED)
8511 80 000 0
Typical Net Weight
Country of Manufacture
China
Standard MOQ
20 pcs
Production Lead Time
43 days
Always verify the exact 8-digit or 10-digit subheading with your customs broker for the destination country, as tariff schedules and duty rates vary by jurisdiction.
Installation Tips
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  1. Disconnect the negative battery terminal before beginning work. On vehicles with an engine cover, remove it to access the coil rail.
  2. Identify the misfiring cylinder using an OBD-II scanner before removal — replace only the faulty coil unless the vehicle has high mileage, in which case replacing the full set is cost-effective.
  3. Disconnect the coil connector by pressing the release tab and pulling straight back — do not lever against the coil body.
  4. Remove the coil retaining bolt (typically M6, 8–10 Nm) and extract the coil with a straight pull. If the coil is seized in the plug well, use a dedicated coil puller — never twist or lever.
  5. Inspect the spark plug while the coil is removed. A fouled or worn plug is frequently the root cause of coil failure — replace the plug if in doubt.
  6. Install the new IGNITION COIL (BOSCH 0221504030), torque the retaining bolt to specification, reconnect the connector until it clicks, reconnect the battery, and use an OBD-II scanner to clear stored fault codes. Confirm no new codes after a short drive cycle.
Tools: OBD-II scanner, 10 mm socket, coil puller (if required), torque wrench, dielectric grease.
Frequently Asked Questions
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Should I replace all ignition coils at once or only the failed one?
On vehicles with fewer than 80,000 km, replacing only the failed coil is acceptable. Above that mileage, the remaining coils are statistically near end-of-life — replacing the full set avoids repeated labour costs and is standard practice in fleet and workshop environments. ok.parts supplies full sets at wholesale MOQ from 7.08 USD per unit.
Does the ignition coil need to be coded or programmed after replacement?
No. Ignition coils are passive components and require no ECU coding. Clear any stored misfire codes with an OBD-II scanner after installation and the system will adapt automatically.
How does the OEM-equivalent aftermarket unit compare to the genuine OEM part?
OEM-equivalent units in this catalogue replicate the current OEM design geometry and material specification. Quality is verified against OEM cross-reference data. When ordering in bulk, confirm with our team that the specification matches the latest OEM revision for your application.
Is white-label or custom packaging available for wholesale orders?
Yes. ok.parts works directly with the manufacturing facility and can accommodate neutral white-label packaging or fully branded packaging with your company logo, part numbers, and barcode. Minimum order quantities and lead times for custom packaging may differ from standard stock. Contact the team via the inquiry form to discuss your specific requirements.
Frequently Replaced Together
PartReason for Combined Replacement
Spark Plugs
OEM ref. varies by cylinder count		A worn or fouled spark plug increases the electrical load on the coil and accelerates coil failure. Always inspect plugs when replacing a coil — replace if worn, cracked, or heavily deposited.
Ignition Coil Set
Same part number × cylinder count		On high-mileage engines, coils age at a similar rate. Replacing the full set during one service visit is cost-effective and prevents repeat call-backs.
Coil Connector / Wiring Harness
Application-specific		Heat and vibration degrade connector pins over time. A damaged connector can cause intermittent misfire even with a new coil — inspect and replace if pins are corroded or the locking tab is broken.