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he first thing is a compression test to check for gasket or cracks ( any qualified mechanic will know that)
next is to check if the scan tool in use has the right protocol for bmw electronics
there are plenty of manual checks that can be done without resorting to a scan tool
Try turning the key on to the run position and leaving it there for about 90 seconds before starting the car. That was how we reset the brake wear indicator on the e36 model so it may work the same on the e46.
SES lights are mostly just "HEY I NEED AN OIL CHANGE" warnings...or some other standard maintenance. Only your dealer or an independent shop with BMW OEM CDI tools can reset this.
Hi , to reset the service light you will need to insert the key and turn the ignition lights on but do not start the engine. you will see a push button on the lower left side of the instrument panel press and hold this until you have a triangle appear which then turns to the brake warning symbol , release the push button then press and hold the bc button in the indicator arm until reset appears , release and again press and hold the bc button until you have a moving clock symbol appear , release the bc button and wait for the display to change , once this has reset turn off the ignition and the service symbol should have reset .
you may want to print these instructions before resetting , regards Mark.
Most probably it is synthetic oil ad unless you own the tool to open the computer you will need a BMW tech to reset the light or at least a certified BMW mechanic.
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