can anyone please just drop a few lines telling me where to find the ecu and what tools are likely to be needed. much appreciated 97 jetta gl 2.0
The ECM is mounted in the right-hand side of the air plenum - you'll have to remove the plastic cover directly in front of the windscreen.
Wait at least one minute after turning the ignition off to disconnect the battery and unplug the wiring harness. It's held in with a simple bracket, a wrench should be all you need to get it out.