What it does
Creates the controlled spark gap inside the cylinder. Condition can reveal but not alone prove other faults.
A component is one possibility inside a larger system. Confirm its inputs, outputs, connections, and any bounded planning context before replacement.
- 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
- 04Budget5 currencies · USD / CAD / EUR / GBP / AUD · planning range only
- 05DecideReject or support the component cause
- 06VerifyApply the exact repair and recreate the symptom
Follow the sequence, stop when evidence changes the path, and verify the exact vehicle information before acting.
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.
This rounded range is a planning aid for the related service topic after diagnosis. It is not a diagnosis, part recommendation, or quote.