Ignition coil

OEM: ERA 880048B 1008886 88F12029A1A

Disassembled car photo

Engine running

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What is this part and why does it matter?

The ignition coil transforms the battery’s low voltage into the high voltage needed to create a spark at the spark plug, essential for igniting the fuel-air mixture.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

  • Engine misfire, especially under load or acceleration
  • Check Engine light with a misfire or ignition coil fault code
  • Rough idle or difficulty starting

Installation information

Bolts to the top of the spark plug (on coil-on-plug designs) or connects via a plug lead — always check the spark plug and boot for condition at the same time.

Frequently asked questions

On modern coil-on-plug engines, each cylinder has its own dedicated coil — a fault in one coil affects only that cylinder’s spark, causing a misfire isolated to that specific cylinder.

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