Help! 335i crippling electrical issues

Tom K. · 01-02-2016, 11:30 AM

Before replacing the alternator/regulator, I'd thoroughly check the IBS. This is what caused the alternator on my E91 to put out over 17 volts intermittently, and was only discovered after throwing two alternators at the problem.

Tom

dannyjones · 01-02-2016, 11:46 AM

Can't the IBS be disconnected to rule it out?

KNS · 01-02-2016, 07:08 PM

IBS..?

08tt335 · 01-03-2016, 11:13 AM

How would I check the IBS before changing the alternator? Definitely don't want to keep dumping unnecessary money into the car. $250 for a battery is painful enough but I knew what I was getting myself into when buying a bmw.

dannyjones · 01-03-2016, 11:27 AM

Quote:

Originally Posted by 08tt335

How would I check the IBS before changing the alternator? Definitely don't want to keep dumping unnecessary money into the car. $250 for a battery is painful enough but I knew what I was getting myself into when buying a bmw.

It's the intelligent battery sensor. I believe it's the big thing on top of your battery, and I've heard it can be disconnected by unplugging just one cable. Search the forum and you should find some info on it

08tt335 · 01-03-2016, 11:38 AM

The IBS is the black ground cable. I'm pretty sure that's what was replaced during the recall.

Tom K. · 01-03-2016, 01:18 PM

Quote:

Originally Posted by 08tt335

The IBS is the black ground cable. I'm pretty sure that's what was replaced during the recall.

IIRC, the IBS was not part of the cable recall in 2013. Luckily, the intermittent problem with mine was discovered when the dealer's tech couldn't restart the car. This was the third time it was in the shop and since the IBS (which is contained in the cable) was replaced in 2011, and subsequently the OEM battery the following year, there have been no more electrical issues.

Tom

08tt335 · 01-28-2016, 11:15 AM

They replaced the ibs sensor and entire alternator. Not sure which fixed the problem but its fixed.

galahad05 · 01-28-2016, 11:32 AM

Thanks for the update man. Helps close the thread properly, and will help others in the future who have the same issues.

08tt335 · 02-12-2016, 11:03 PM

Quote:

Originally Posted by Gohan335i7

C. Check to see if your turbos have been replaced because if they haven't then you can replace them under the BMWNA turbo warranty that lasts until 82,000 miles I believe -Gohan335iE90

How do I go about getting the turbos replaced under warranty? I'm at 77,000 now so I'd love to get that done if possible.

Abax335 · 02-12-2016, 11:35 PM

You may be out by years. It's 8yr/82k.

You'd need a fault (30ff) or a waste gate rattle or both. The right dealer could hook you up

fazman · 02-13-2016, 03:16 PM

Quote:

Originally Posted by 08tt335

How do I go about getting the turbos replaced under warranty? I'm at 77,000 now so I'd love to get that done if possible.

might i suggest: https://www.penfed.org/Route-66-Extended-Warranty/

JEDH9 · 09-20-2024, 04:02 AM

Currently having the exact same electrical issues, christmas tree on dash including airbag, seatbelt, abs, tyre press, engine temp etc aswell as no electrical input for windows or indicator/wiper stalks, radio on steering wheel and random inputs from AC system........ worse thing is i can smell a horrible phosphorus/burning smell..... hoping its just a bad earth, alternator, ibs sensor or voltage reg

01-02-2016, 11:30 AM	#23
Tom K. Major General 125 Rep 5,626 Posts Drives: '07 328iT, '13 Boxster Join Date: Mar 2008 Location: Maryland iTrader: (0)	Before replacing the alternator/regulator, I'd thoroughly check the IBS. This is what caused the alternator on my E91 to put out over 17 volts intermittently, and was only discovered after throwing two alternators at the problem. Tom
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01-02-2016, 11:46 AM	#24
dannyjones Lieutenant 87 Rep 405 Posts Drives: 2011 BMW 335i M-Sport Join Date: Jan 2014 Location: Florida, USA iTrader: (0)	Can't the IBS be disconnected to rule it out?
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01-02-2016, 07:08 PM	#25
KNS Lieutenant 139 Rep 439 Posts Drives: 128i and Porsche Join Date: Dec 2014 Location: Arizona iTrader: (0)	IBS..?
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01-03-2016, 11:13 AM	#26
08tt335 Enlisted Member 13 Rep 35 Posts Drives: 2008 E92 335i Sport Join Date: Dec 2015 Location: Virginia iTrader: (0)	How would I check the IBS before changing the alternator? Definitely don't want to keep dumping unnecessary money into the car. $250 for a battery is painful enough but I knew what I was getting myself into when buying a bmw.
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01-03-2016, 11:38 AM	#28
08tt335 Enlisted Member 13 Rep 35 Posts Drives: 2008 E92 335i Sport Join Date: Dec 2015 Location: Virginia iTrader: (0)	The IBS is the black ground cable. I'm pretty sure that's what was replaced during the recall.
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01-28-2016, 11:15 AM	#30
08tt335 Enlisted Member 13 Rep 35 Posts Drives: 2008 E92 335i Sport Join Date: Dec 2015 Location: Virginia iTrader: (0)	They replaced the ibs sensor and entire alternator. Not sure which fixed the problem but its fixed.
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01-28-2016, 11:32 AM	#31
galahad05 Brigadier General 158 Rep 3,158 Posts Drives: '07 335i e90 Join Date: Mar 2008 Location: Long Island NY iTrader: (0)	Thanks for the update man. Helps close the thread properly, and will help others in the future who have the same issues. __________________ Always do right. This will gratify some people and astonish the rest. --Mark Twain
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02-12-2016, 11:35 PM	#33
Abax335 Lieutenant 81 Rep 540 Posts Drives: 2008 BMW 335xi 6spd Join Date: Oct 2015 Location: Orange/Rockland iTrader: (1)	You may be out by years. It's 8yr/82k. You'd need a fault (30ff) or a waste gate rattle or both. The right dealer could hook you up
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09-20-2024, 04:02 AM	#35
JEDH9 Registered 0 Rep 1 Posts Drives: BMW 335I E92 Join Date: Sep 2024 Location: NCL UK iTrader: (0)	Currently having the exact same electrical issues, christmas tree on dash including airbag, seatbelt, abs, tyre press, engine temp etc aswell as no electrical input for windows or indicator/wiper stalks, radio on steering wheel and random inputs from AC system........ worse thing is i can smell a horrible phosphorus/burning smell..... hoping its just a bad earth, alternator, ibs sensor or voltage reg
	Appreciate 0 Quote