BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > No start issue… not battery

Thread Tools Search this Thread
      05-21-2021, 01:14 PM   #1
New Member

Drives: Bmw e90
Join Date: May 2021
Location: Nevada

iTrader: (0)

No start issue… not battery

Hi! I have 2008 e90 335xi (manual) that is not starting. Power is on when i put the key in and everything but it would not start. I checked the battery and is good (even recharged it to be safe). I was about to start to replace the starter but i thought maybe i should get some insights here first. Im new to bmw world so im not entirely familiar with it. Im assuming maybe its electrical or computer module issue but just not sure. I would appreciate any suggestions on how to troubleshoot this issue. Thanks in advance!

Ill try to post a vid of how its doing when i tried to start it.

View post on imgur.com
Appreciate 0
      05-21-2021, 02:08 PM   #2
I only ride park
United Kingdom

Drives: e93 335i Msport - Clio 182 FF
Join Date: Aug 2020
Location: Bognor Regis

iTrader: (0)

Earth issue or maybe immobiliser? is my guess.

Though I`m sure the smart people will be along shortly and will give you a proper answer
Appreciate 0
      06-22-2021, 02:45 AM   #3
New Member

Drives: E90
Join Date: May 2021
Location: AL

iTrader: (0)

If there's no noise like having a dead battery, most likely it is the starter.
Appreciate 0
      06-23-2021, 07:51 AM   #4
Brigadier General
Antetokounmpo's Avatar

Drives: E90 6MT FBO; '18 F150 Platinum
Join Date: Jul 2013
Location: WI

iTrader: (3)

Garage List
Check chassis ground first. You can connect the oil filter housing to the ground post using jumper cables.

2008 335xi 6MT | VRSF Catless DP | VRSF 7" FMIC | VRSF CP | TIAL BOV | DCI | MHD 2+
BC Racing BR | Stoptech 600 | Firehawk Indy 500 255 Square | Atric Altimax 225 Sq.
2018 F-150 Platinum 701A | FX4 | 3.5 EcoBeast
Appreciate 1
4 Doors613.50
      06-23-2021, 01:44 PM   #5
4 Doors
4 Doors's Avatar

Drives: 2008 BMW 335xi (E90)
Join Date: Mar 2018
Location: Michigan

iTrader: (1)

Garage List
2008 BMW 335xi  [5.00]
Originally Posted by Antetokounmpo View Post
Check chassis ground first. You can connect the oil filter housing to the ground post using jumper cables.
+1 check the ground
Instagram: @4doors

Current: 2011 E91 328i M-Sport Touring
Past: 2008 E90 335xi
1996 E36 328i Sport
Appreciate 0
      06-25-2021, 01:33 PM   #6
Lieutenant Colonel

Drives: 2009 E90 335xi, 2011 E93 M3
Join Date: Dec 2012
Location: Boston

iTrader: (3)

So, since you are new to the BMW world, there are five main reasons why your car will fail to activate the starter:

1) the starter or solenoid is dead

2) the battery is old/weak

3) the ground strap between the engine block and chassis has corroded and failed.

4) the cable carrying current from battery to starter is corroded, most likely at the passthru where it leaves the bottom of the battery box. Often the result of water accumulating in the battery box

5) there is a problem with the CAS module, which is directly connected to the solenoid and activates it. This failure can be in CAS hardware or due to CAS failing to detect the clutch or brake pedal being depressed because of bad sensors/wires/connector at those pedals

Each of these possibilities is relatively easily checked. Batteries and starters are not inexpensive so it makes sense to test before blindly replacing components.

As several posters indicated, it's very easy to test the ground strap - use a jumper cable to bypass it by connecting one end to the engine block and the other to a clean chassis ground or the battery negative terminal if you can't find a good spot in the engine compartment.

You can use a jumper cable in an analogous fashion to bypass the lead from battery positive terminal to jumper terminal in the engine compartment.

Battery of course should have resting voltage above 12, preferably close to 12.6. The car may start with less but if it is less, the battery is not in good shape. Battery can always be removed and taken to an Autozone or similar parts house which generally can do a load test for free.

Testing the starter/solenoid is a little more involved because you have to remove airfilter to get better access or intake manifold to get best access. At that point, put 12v on the terminal that the small diameter wire goes to.

If all that checks out, you've got a CAS problem.
Appreciate 1
      07-12-2021, 10:29 AM   #7
E92_William's Avatar

Drives: 2008 BMW 328xi
Join Date: Apr 2021
Location: South Florida

iTrader: (0)

Get a broom stick and hit the starter motor and solenoid. This is common starter failure mode. Mine failed right after coding my battery and made no noise or click
Appreciate 0


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 12:27 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST