Last post on Jul 28, 2013 at 1:05 PM
You are in the BMW 5-Series
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BMW 5 Series, Electrical, Engine, Sedan, Wagon
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#2116 of 2735 Crankshaft Sensor
Apr 28, 2008 (4:12 pm)
Hi; I own a 2002 530. There is a problem with the cranck shaft sensor. Or so the computer says. The car runs fine and I have been told this code appear very often on BMW and driver just canīt notice any problem with the car. My question is, how can this happen?, It sounds pretty bad to loose info on the crankshaft positioning and yet the car runs fine......
One the repair is done should I expect better low end torque, better MPG or what?
#2117 of 2735 Re: Crankshaft Sensor [feroz]
by MrShift@Edmunds HOST
Apr 29, 2008 (8:11 am)
The computer is probably sensing some fluctuations in the Crankshaft Sensor---which fortunately don't seem to be severe enough to produce any symptoms. These sensor outputs can be tested by diagnostic equipment. Whether your car will run any better is hard to say, as it is all relational (better than what?).
Here's a YouTube video on these sensors with an obnoxious soundtrack, but it does tell you the different types of crankshaft sensors and how they work. I'm not sure which one your BMW uses but it's probably the most complicated one
Mr. Dull EngineerTalks About Crankshaft Sensors
PS: Turn down your volume, this soundtrack is LOUD.
Apr 29, 2008 (9:28 am)
My 1999 528i's alarm goes off nightly b/t 2:00-2:30 (I'm sure the time does not matter) no sign of foul play. Wondering- is the computer sending this bad signal or do the batteries in the key fob need to be replaced? I have secure parking while at the office, so I leave it unlocked during the day, but the alarm goes off when I lock it in other areas.
We have on the street parking and we love this vehicle (with it's 232 G miles) but I know my neighbors want to put this car out of commission as much as I do.
#2119 of 2735 Re: Crankshaft Sensor [Mr_Shiftright]
Apr 29, 2008 (2:06 pm)
Thanks; saw the video. Iīm still puzzled as to why such an important imput may be failing and the cars runs Ok, Will replace the sensor and let you know what happens.
#2120 of 2735 Re: Crankshaft Sensor [feroz]
by MrShift@Edmunds HOST
Apr 29, 2008 (4:14 pm)
I can only assume that the variance is large enough for the engine light to detect but not large enough for the driver to detect.
#2121 of 2735 Re: Crankshaft Sensor [Mr_Shiftright]
Apr 30, 2008 (9:14 am)
I had a similar problem with the VANOS Control Module. The CEL came on and the diagnostic codes indicated a problem with the VCM. I was tempted to do a "black tape repair" as the car ran just fine, mileage was unchanged.
The techs told me that I'd probably experience a gradual decline in performance so I elected to replace it because I had partial warranty coverage.
#2122 of 2735 1988 E34 Engine Questions
Apr 30, 2008 (7:06 pm)
I bought a 1988 JDM E34 535i with 146k Kilometres last year. After a head gasket and oil gasket, it's good to go...except someone broke in, and smashed the deck and center computer out of it, and cut through all of the wiring harnesses in the dash... OKay, fine, wtvr, however the fuel gauge, temp gauge, speedo, odometer and tach don not function properly, the low fuel light does work however. The Speedo and tach function some times, and other times fluctuate wildy in comparison to actual road speed and engine speed...any clues? Also, at start up, the car makes a sound like that of a loud digital camera with a zoom lense...what is that? And lastly, it appears that there is 2 intakes on the vehicle...but only one air filter box, with the "other intake" piping into what appears to be some sort of belt driven contraption on the engine, w/out any filtration, if it were a super or turbo charger would that air not need to be filtered? or is that the exhaust charge piping being routed back into it? I really no little about this particular car as info is hard to come by, any suggestions would help
#2123 of 2735 Re: Drivers seat modification [dukiedoug]
May 04, 2008 (12:47 pm)
I had the same problem with my 2004 545i's seat. I am 5'5' and the driver's seat was very uncomfortable. I needed a 1.5inch pillow (I used a very firm lumbar support pillow) to sit on, just so that the seat's comfort was tolerable. I drove around like that for 3 years, embarrassed every time I pulled in for valet parking or carwash. When I was looking for my next car, I was very turned off by BMW b/c of the seat problem. Someone on this board recommended the comfort seats. I was doubtful, but I tried it and it is great. I now have a 2008 535i with the comfort seats, no pillow needed. What a relief! I recommend you look for a car w/ comfort seats so you don't have to pretend you look cool sitting on a phone book for the next few years!
#2124 of 2735 Re: Drivers seat modification [bmwgal3]
May 05, 2008 (4:21 pm)
Thanks for your input. I will definitely keep that in mind. However, I think I have decided on going with the infiniti g35, their power seats have more than enough lift for me. But thanks again for your suggestion. I definitely do like the 5 series and will not rule them out of my next purchase.
#2125 of 2735 2005 525i Battery replacement
May 06, 2008 (6:03 pm)
My battery is completely dead and we are trying to figure out how to replace it...all we can find from the manual is that it is in the trunk...what next? Also, after reading some posts, it sounds like it might just need to be recharged..is it best to jump it with another car or to use a Battery Tender..if so, how do we do it? How long should an original battery last? I have not been driving it much and maybe have gradually drained it? Mileage is 63K. Please help!!