Two problems related to ignition module have been reported for the 1997 Audi A4. The most recently reported issues are listed below.
My Audi a-4 was parked all day, all of a sudden the car caught on fire only in the dash. I have reported this to Audi they refuse to give me a report after looking at the car. They also said they could not tell if it was tampered with. The fire dept that put out the fire, said it was an electrical fire. This car is stock, I have had to replace the ignition switch and module. This car has had recalls and may complaints. This could caused injury and death if my child and I were in the car. I feel as if I am being blown off, I have called and spoke to many people and there is no straight answer. Now my car is sitting at scottadale paint and auto body where I was instructed to leave it by Audi. I have called there today to check on my car and no one can find it. I have also been sending e-mail and so on.
Intermittent problem with engine computer kept it from accelerating. It would suddenly only idle out from a stop. If you were to pull into traffic you could not accelerate and would be hit or cause someone else to swerve to avoid you. It took the dealer 7 months to find the problem and replace the ecu. It became obvious after replacement that it had been bad since day one and gradually got worse since all acceleration hesitation went away. This unit quickly failed and had to be replaced also.