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#11
05-31-2023, 05:04 PM
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Look into your alternator and if you can replace the VR on it. Much cheaper than whole alternator
__________________
2011 E70 • N55 (me) 2012 E70 • N63 (wife) 
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#12
05-31-2023, 06:21 PM
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Eh. Kinda throwing the towel on this. VR is cheap but it's got more issues that I'm just throwing in the towel. I guess this is one of them but the main shitlist is the Valley Pan. It started with a small loss and almost after every trip these days, I'm popping the hood. Sometimes it needs 3 oz top off. Sometimes 12-14 oz top off. It's so varied on how much loss between each drive session but it's to the point where even buying coolant is questionable
Last edited by jsoto; 05-31-2023 at 10:14 PM.
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#13
05-31-2023, 06:36 PM
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Quote:
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#14
05-31-2023, 08:12 PM
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It's common with alt failure and e53 that you'll get trifecta if voltage momentarily drops below about 11.5. Even if the voltage recovers no sbs/dsc until you restart
__________________
2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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#15
05-31-2023, 09:38 PM
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Did someone say Brembo!?
Would love to upgrade the brakes on my X5, but they probably wouldn’t fit the 16” wheels I’ve got though.
__________________
Current Original owner 2002 E53 X5 4.4i to 4.6i swap 2026 G80 M3 6 spd 2025 G06 X5 50e Former 1972 Audi Fox 1986 Saab 900S 1996 BMW Z3 1998 BMW E36 M3 Sedan 2004 BMW E46 M3 2006 Audi A3 Quatro 1993 Mopar 318 Jeep Grand Cherokee 2015 V6 Jeep Grand Cherokee
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#16
06-01-2023, 04:48 AM
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Going back to the original topic I’ve had my motorhome battery on for the last few days. It certainly turns over more quickly than the one I took off.
Yesterday I received the new FSR in the post so I half heartedly started to install it. Couldn’t really be bothered so gave up after a while but I did notice that there was no fan noise at all from behind the console - normally it is quite evident. I’ll get round to fitting it soon I guess. At the moment I have a spare battery and jump leads in the back just in case as I’m doing a lot of longer journeys over the next few weeks. I probably should buy a small portable booster pack..
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#17
06-01-2023, 10:04 AM
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I would pull up the voltage in the dash while driving. Unlike the E70, the E53 doesn't turn the alternator on and off during normal use so should stay at 14 ± 0.4 and usually won't change more than ±0.2 from it's baseline.
__________________
2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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#18
06-01-2023, 12:39 PM
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Be curious as I have asked in the past - what readings do you see in the cluster when healthy
I've never looked at it when everything is **healthy** to see what the cluster shows.... I presume there is some V loss after modules or no, it should be 14 on average Last edited by jsoto; 06-01-2023 at 12:54 PM.
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#19
06-01-2023, 01:02 PM
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On my E53 the voltage was 13.8 ± .2 no matter the rpm.
__________________
2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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#20
06-01-2023, 02:13 PM
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The trunk unlock usually happens from water ingress. I pulled the rubber button off mine when that happened and never replaced it. Worked until the car was killed by a deer
__________________
2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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