Car Owners Hub UK - Built by Drivers, for Drivers

I require assistance with my BMW E39 540i, please.

I observed that the battery indicator illuminated on my dashboard.
I examined the output voltage and discovered it was generating less than 12 volts, indicating that the vehicle was not charging and was solely reliant on the battery.

I detached the Bosch 120amp alternator and recognised that I required a new regulator and rectifier as well.
I experienced two malfunctioning diodes from the rectifier.

Could someone assist me in acquiring a new Bosch rectifier to repair my alternator?

Specifications of my Alternator and Rectifier

Alternator - Bosch 120 amp - 0 123 515 023
Rectifier - Bosch - 1 127 328 009

Any assistance is highly valued.


I appreciate it.

Google is your ally.

I attempted to utilise Google to search for an alternator (Bosch) as well as the Bosch rectifier.

The item was either unavailable or out of stock.

Verify the part number; you might discover an alternative brand that is compatible.

Locating an alternative alternator posed no difficulties.

Locating the components necessary to reconstruct my Bosch alternator posed a challenge.

I intended to verify the components you require; many parts are identical, merely with different labels.