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Ignition Coil Replacement in Vantaa
A faulty ignition coil makes the engine misfire — replacement restores smooth running.
Ignition coils often wear at the same time — replacing just one is rarely a lasting fix; it's better to renew the whole set.
Ignition coil replacement pricing:
- Single ignition coil replacement – 140 €
- All four coils together – from €350
- Manufacturer OE coil set – from €450
- Spark plug replacement at the same time – reduced price
- Diagnostics and test drive included
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Ignition coil replacement
Price includes coil and labour. Renewing all coils at once is strongly recommended if one has already failed.
from140 €
When an ignition coil needs replacing
An ignition coil steps the car's 12 V up to 30 000–45 000 V of ignition voltage, with which the spark plug ignites the mixture. The coil heats and cools with every ignition — copper windings fatigue and eventually insulation starts to leak. The result is a misfire on a single cylinder, which shows up as a rough-running engine, power loss and an engine warning with codes P0300–P0304. Symptoms of a faulty ignition coil: the engine shakes at idle, acceleration jerks, fuel consumption rises and popping noises can be heard from the exhaust. On modern cars the engine ECU can cut fuel to faulty cylinders to protect the catalyst.
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Why do ignition coils keep failing?
The most common cause of premature coil failure is worn spark plugs. When the plug's electrode gap is too large, the coil has to produce a higher than normal voltage to generate a spark — this stresses the copper winding and eventually burns it out. That's why plugs and coils should be replaced at the same time. Another common cause is heat stress: high engine bay temperatures age the coil's electronics, and if engine cooling isn't in good order, coils can fail already at 50 000 km.
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