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The battery light on the dash of my 1998 BMW 540i started to flicker. Instead of buying a pricey replacement alternator, I opted to replace the $34 voltage regulator which is located on the back of the alternator.
This process is for the air cooled alternators on the early M62s. Starting in 1998 when they added VANOS to the M62, they also switched to a water cooled alternator which is not as serviceable.
Tools Required:
-8mm socket
-10mm socket
-13mm socket
-Philips head screwdriver
-Electrical contact cleaner
-Soft wire brush
Parts Required:
-Voltage Regulator BMW: 12311713491 Bosch: 80201172
Recommended Parts to Replace
-Serpentine Belt: 11287833264
-Serpentine Belt Tensioner: 11281742858 and 11281709613
#bmw #alternator #howto #repair #e39