I hope it's okay to post a problem I'm having with my Lexus RX 300 since lot's of us have secondary cars and could possibly learn from this thread :typing:...
Today I turned the ignition key on the Rx 300, heard one single click, and nothing happened-it didn't start. I tried it once more and same thing. Here's the weird part... round 3- car turns on. I take her for a drive around the block and back, park her, turn her off and back on, again- one click. 2 more tries-nothing. 4th try- vrooom! What could this be?
2 tidbits of info: Last year the car had an idle air control valve problem where it wouldn't start no matter how many times you turned the key until you tapped the gas pedal, than it would start. The mechanic took the valve, inspected it and said it had a lot of build-up on it and said that was most likely the problem, he said I could replace it or he could clean it really good and might last a long time and I went with the cleaning. It's been about a year with no problems and I don't think it's the same symptoms, slightly different. I think this might be more of a starter issue but I'm not positive. Thoughts and ideas please :dunno:
Since you are referring the E39 M5 parts and support vehicle, I think the quesion is allowed!:grinyes:
My first thought is bad battery cable (not just on M5's) or possible issue with either ignition switch or key. Bad ground would also be a low probablity.
Ignitions switches can wear out or the contacts can go bad, but that is usually on pretty high mile cars.
The electronic keys can get a little cranky. If you have another key, try that and see if it makes any difference.