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#81
08-18-2015, 05:48 PM
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__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) 
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#82
08-19-2015, 01:07 AM
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in my opinion if your alternator is full of gunk like you say it is I would go with a new or rebuilt unit. because your brushes in your alt are probably full of crap also .
__________________
 2003 bmw x5 3.0i ,219000km build date 2003-08-18
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#83
08-19-2015, 11:47 AM
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Quote:
How does VR fail? The electronic inside it (such as rectifier etc.) fails. If you have a modem or router at home, then you will know what I mean: electronic components have finite lifespan, modem, router have a lifespan around 4-5 years or so. Back to the VR business, after millions of cycles working as a rectifier, it will eventually fail.
__________________
1998 E39 528i 5sp MT 2006 E53 X5 3.0 6sp MT
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#84
08-19-2015, 05:29 PM
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rectifier is an elecronic part of the alternator, the brushes which there are 2 of them touch the commutator the piece that spins inside the alternator, that has copper windings .
__________________
2003 bmw x5 3.0i ,219000km build date 2003-08-18
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#85
06-30-2016, 04:59 PM
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Quote:
I replaced my alternator back in Jan 2016 with a Duralast one from AutoZone. It has a lifetime warranty. This past Saturday my instrument cluster lights keeping going and off for DSC 4x4, Battery, ABS etc. With a miles from my house I decided to park it immediately. Should I also test the battery ? When I head to AutoZone for an exchange.
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#86
06-30-2016, 05:10 PM
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Voltage Regulator
Just an update to those who may find it interesting or useful. What I ended up doing was replacing my voltage regulator as well. Mine was the 3.0 model. It is much more affordable than replacing the alternator and almost the same amount of work. And, yes, it sits right on the alternator so removal just involves removing two screws after taking the alternator out. My regulator cost $25 online and immediately fixed my 4x4, abs, etc lights.
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#88
07-02-2016, 02:25 PM
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Thought I would drop this link to a DIY video I made a few months ago for replacing the M54 alternator. Hope it helps someone!
https://www.youtube.com/watch?v=GQ3wkR_STlI
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#89
08-26-2016, 12:18 PM
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What am I don't wrong with the serpentine belt? The belt rubs when it goes around the tensioner and the wheel with the alternator bolt. Do I need a new tensioner pulley? Thanks for any help
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#90
08-26-2016, 05:38 PM
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The idler on the top... look at the back side of it carefully. It is keyed and has a little dimple in it. Make sure the dimple is aligned correctly and seated against the engine. It only seats one way. That should cure the belt issue.
Your belt routing looks a little interesting too. Here's the routing - this is my 330i, but same engine.
__________________
12 E70 3.5i xDrive 03 E46 330i ZHP 01 E53 3.0i 98 E36 323is 12 Audi A4 Quattro 79 Triumph Spitfire 73 MGB Last edited by Scott ZHP; 08-26-2016 at 05:44 PM.
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