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Message: <blockquote data-quote="BimmerDan" data-source="post: 25670" data-attributes="member: 3935"><p>This must be the year where the focus is on my car cos' signs of wear and tear is finally showing. My poor old E39 (M54)...Not long ago it was the  A/C thermostat, key, power window and now the loss of power during drive.The symptoms are as follow:1. During drive, car started to loss power, RPM starts to drop creating the loss of pedal feeling and car just doesn't go forward and sometimes the RPM will mysteriously climb back up again and car move normally. Otherwise the engine will just shutdown.2. No jerking or stuttering feeling before the engine shuts down.3. With the engine shut down while car still rolling, restarted the engine each time with no problem and car resume motion....4. This problem can occur about 10 times within a 5 Km distant.Had the following possibility ruled out at my mechanic today.- Precat Sensors ( both sensor changed)- Fuel Filter changed.- AF sensor cleaned and tested with a new sensor.- Diagnostic showed no fault codes.- Idling is perfect.- Spark plug/coil are all goodQuestion is. What was that all about? thank you</p></blockquote><p></p>