Passat / Audi A4 / A6 1.8T Ignition coil 06A905115L classic tuning upgrade

For Passat and Audi A4/A6 1.8T, ignition coils with OEM number 06A905115L can be directly replaced and are highly versatile. Their core function is to convert low voltage to high voltage to precisely ignite the air-fuel mixture and ensure smooth engine operation. After installation, they can resolve acceleration hesitation, rough idle, and power drop, especially suitable for classic tuning and upgrade needs. If cold-start is difficult, fuel consumption increases for no reason, or the engine fault light comes on, more often than not the coil is aging and leaking current; replacing this part restores smooth operation.