My VW polo car got electric “clicking noise” when step on accelerator. It happened since last year. The noise get louder when the engine was hot. Diagnosed – No error codes. Other symptoms were lost of power, unstable RPM, rough idling and shift to wrong gear when driving especially in hill road.

After troubleshooting all the possible causes, suspected the ignition transformer possibly causing the issue (I am pretty sure). So ordered the ignition transformer which cost just little over RM1k.

Took out the old one and found one of terminals was crack.

Ignition Transformer

Ignition Transformer – Crack Terminal

Ignition Transformer – PN# 032 905 106B

Replaced with the new one and so far no more clicking noise.