What it does
Creates the controlled spark gap inside the cylinder. Condition can reveal but not alone prove other faults.
Test the surrounding system before replacing this component.
- 01ObserveCreates the controlled spark gap inside the cylinder. Condition can reveal but not alone prove other faults.
- 02Check inputsPower, ground, command, mounting, and conditions
- 03ComparePreserve cylinder and operating-condition data / Inspect the plug, well, boot, and thread area
- 04Budget30 currencies · USD, CAD, EUR, and GBP preview · full values below · planning onlyComponent$288–$399 USD · per spark-plug service · U.S. national parts-and-labor estimate · Price evidence reviewed 2026-09-28
- CAD CA$410–CA$570
- EUR €255–€360
- GBP £215–£305
- 05DecideReject or support the component cause
- 06VerifyApply the exact repair and recreate the symptom
Where it is located
Location and access vary by platform, engine, drivetrain, market, and installed equipment. Identify the exact component using the vehicle’s service information before disconnecting or removing anything.
Symptoms are clues—not proof
Start with the system symptom and operating conditions. A failed connection, control input, related component, incorrect prior repair, or mechanical condition can imitate component failure.
Use the exact safety procedure
Confirm isolation, support, pressure, temperature, and stored-energy hazards for the vehicle before testing.
Testing focus
Preserve cylinder and operating-condition data
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Inspect the plug, well, boot, and thread area
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Compare condition without treating appearance as proof
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Use the exact plug type, gap, torque, and installation procedure
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Replacement boundary
IAR does not publish a universal replacement procedure for this component.
Planning estimate only; test before replacing. Not a diagnosis or quote.
Show 26 more currencies
- Source 1: Spark Plug Replacement Cost EstimateSource date 2026-09-03 · Retrieved 2026-09-28