Should I replace all coils at once?

Not necessary unless they are all original and high-mileage. Replace the one that failed.

Are aftermarket coils OK?

Quality aftermarket coils work fine. Avoid the cheapest options — Delphi, Denso, and NGK are reliable.

High Severity

Ignition System

Coil on cylinder 2 has a circuit fault.

Common Fix

Replace ignition coil

Estimated Cost (DIY)

$20 - $80

Failed coillikely

Wiring issuepossible

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Should I replace all coils at once?: Not necessary unless they are all original and high-mileage. Replace the one that failed.
Are aftermarket coils OK?: Quality aftermarket coils work fine. Avoid the cheapest options — Delphi, Denso, and NGK are reliable.

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