DSC, ABS, and brake light on highway

[jdstrickland]

You can replace the voltage regulator, you do not have to get the entire alternator.

This might be the wrong unit, but you need Item 2,

RealOEM.com * BMW E53 X5 3.0i Generator single parts 120A Bosch

[Riggodeaux]

Pardon my ignorance, but I thought the six? diodes in the alt were internal and different from the voltage regulator. If a diode problem, I have to replace the alt, and not just the VR, correct?

[TiAgX5]

Diode replacement........

How to rebuild Bosch water cooled alternator

[Ricky Bobby]

Would the steps be the same or similar on the air cooled alternators? I think us I6 guys have the non-watercooled one

[TiAgX5]

I would think the I6 aircooled alternators are DIY rebuildable also, I haven't looked into it.

[HalifaxMike]

Well got the X back from the Indy but still have the trifecta. The only Auto-logic code left is 117 Brake-light switch (line). The brake light switch has been replaced and the fault is intermittent. We assume it is the module that needs rebuilding, does this make sense?

Thanks again guys!

Mike

[Ricky Bobby]

If you haven't rebuilt the module yet its a good place to begin

[Riggodeaux]

So, I replaced the alternator, using a reconditioned Bosch AL0703X [BMW -599 p/n]. While in there, I replaced the power steering reservoir and drained/replaced the fluid. The problem with this task is getting to the banjo bolt at the rack, its up above the metal protective cover. I used the ebay 32mm fan clutch tool, a good $17 [plus shipping] investment. Unfortunately, charging the battery [an 18 month old interstate] while doing the alt install, it appeared not to take/keep a charge, confirmed when I tested the alt and battery on the meter at my local O'Reilly's. I supposedly have a 30 month free replacement warranty on the Interstate, we'll see. If not, to Pep Boys for the Bosch. Still showing the trifecta, even without the tell-tale click, which I hope is alt/battery related, for the moment. Fix one at a time, I suppose ....

[ScoobyDooBMW]

Originally Posted by Riggodeaux

So, I replaced the alternator, using a reconditioned Bosch AL0703X [BMW -599 p/n]. While in there, I replaced the power steering reservoir and drained/replaced the fluid. The problem with this task is getting to the banjo bolt at the rack, its up above the metal protective cover. I used the ebay 32mm fan clutch tool, a good $17 [plus shipping] investment. Unfortunately, charging the battery [an 18 month old interstate] while doing the alt install, it appeared not to take/keep a charge, confirmed when I tested the alt and battery on the meter at my local O'Reilly's. I supposedly have a 30 month free replacement warranty on the Interstate, we'll see. If not, to Pep Boys for the Bosch. Still showing the trifecta, even without the tell-tale click, which I hope is alt/battery related, for the moment. Fix one at a time, I suppose ....

That sucks. I'm surprised the interstate didn't hold up. My buddies shop sells them and I never hear of them coming back under warranty. Hopefully it's the battery this time around.

[Ricky Bobby]

My alternator is spot on, never dips below 13.4v, and the Bosch batt must still be running strong too. I have a feeling I need a DSC pressure sensor or brake light switch from the intermittent error I still am throwing. But at least I know the module is good to go now, lol