Question about 1994 BMW 3 Series

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Where is the IAT sensor in the E39 5 Series.

Hello,
can anybody help me to find the IAT sensor in my 1998 E39 523i and will i have to disconnect the battery to change this as i would rather not as i have no code for the D player.
Any help would be great as the engine looks like a maze.
cheers.

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6 Suggested Answers

  • 95 Answers

SOURCE: IAT and oxygen sensor on a 1994 BMW 740i

http://www.bmwtips.com/tipsntricks/Exhaust/O2sensor.htm

Posted on Jan 07, 2010

  • 50 Answers

SOURCE: my car bmw 523i 1998 turned off whine it's on n

sounds like the crank sensor is bad.

Posted on Jan 15, 2010

tbarratt
  • 96 Answers

SOURCE: Where is the Crank Sensor '99 BMW 523i E39 Auto

are you sure you need the crankshaft position sensor changed. it is at the back of the engine i believe, but.....
check for a wet ecu first... read the note on e36...

the ecu compartment is under the windshield on the passenger side on E36

you gain acess to it under the hood....
this compartment gets wet, the ecu lays on a flat surface in that
compartment.

the bottom side of the circuit board gets wet and starts corrosion.

remove the ecu, take the bottom plate off, clean the bottom of the circuit
board with alcohol and a soft tooth brush.

you should be able to see the signs of corrosion or conductive build up.

this gunk bridges solder points doing all sort s of wierd things to your
car, including false sensor readings from asc/abs controllers and other
sensors....

all the way to engine failure and worst case burnt and shorted wiring
harness.

I'm on my 3rd ecu, took me and the repair boys a few years to figure this
one out.

BTW: i would get that ecu mounted above that flat surface, use some sort
of standoff to raise it so that it is not laying in the wet.

Posted on Feb 07, 2010

miket756
  • 2702 Answers

SOURCE: bmw 5 series 1998 (R) 523i water problem temp

you wont like me if i do? oh well nobody like me anyhow!
if the water jaket built up this much presher its likley to be a stuck thermostat or a blown head gasket,,,,to test for this,, have a "sniffer test" done they take some water out the water jaket and test it to see if it has any hydrocarbons in it,, if it has then its the head gasket poped or a cracked head!
this test takes no longer than 30 seconds to do,,,even stoping for tea!
if you fit a new thermostat first,,,, blead the air out the water jaket as well ,,,,,,,then if it boiles up,,,,its the head gasket?
see,,,you hate me now!!!! dont yer?

Posted on Aug 07, 2010

Testimonial: "your right i don't like you for that!!, however you have pin pointed it down for me i can live in hope it is the thermostat thanks for your help. "

  • 1 Answer

SOURCE: will the Pioneer AVH-P3100DVD fit the 1997 bmw

Yes, I just installed one today. You will have to remove the tape deck and the 6 disk changer to make it fit.

Posted on Feb 09, 2011

  • 14036 Answers

SOURCE: i got a bmw 1998 523i, and cannot turn the

problem could be the rain and driving light sensor faulty or problem could be in the light switching center control unit.the dealership has to fix.most everything on bmw computer control.

Posted on Apr 14, 2011

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  1. Disconnect engine control sensor wiring (12A581) from intake air temperature sensor (IAT sensor) (12A697) .
  1. Remove intake air temperature sensor from air cleaner outlet tube (9B659). (This is the tube that goes from the air cleaner to the engine.)
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--------------------------------------------------------------------------

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