obc temp sensor

Wed Dec 13, 2006 5:05 pm

can anyone please tell me where the outside temp sensor for the obc is located... looked in n/s/f air intake but cant see it???

Wed Dec 13, 2006 6:34 pm

it is there on mine ..it comes down into the intake ,,,check if it has not fallen out ..there will be a hole ...anyway its a yellow thing with a point...sorry i cant be more help

Wed Dec 13, 2006 10:23 pm

As DaveD says. On facelift cars there's a hole and split tube sprouting out of the LH brake air intake duct, and the sensor should be pushed in here.

Wed Dec 13, 2006 10:58 pm

here is what you are looking for,

if your OBC is bonging its head off and showing -55, then it could just be missing!

Thu Dec 14, 2006 8:54 am

Mine looks different, full black color and a slightly different shape.

Thu Dec 14, 2006 12:54 pm

I think the pre-facelift ones are all-black?

Thu Dec 14, 2006 12:58 pm

thanks guys

Thu Jan 25, 2007 12:01 am

where is it on pre-lift cars. mine doesn't work and makes a gong when i turn the car on. need to find it before i get a sensor to replace it.

Thu Jan 25, 2007 10:04 am

From memory, there's an extra small hole in the black-bit of the front spoiler on the passenger side. If you have a sensor, it's behind this.

But I don't know how you get at the sensor?

Thu Jan 25, 2007 8:29 pm

thanks, i think I've found it. kinda looks like it could of been a snapped screw poking out of a hole under the screw that holds the bumper in place.

I'll try and get it out and see if the connections are bad and maybe redo them. supposedly these things are supposed to have a lifetime use out of them due there no moving parts construction.

Thu Jan 25, 2007 9:03 pm

Are all the OBC temp sensors the same regardless of the age of the E30? Will a sensor from a facelift car work on an OBC from say an 86??
Cheers Spadge..

Thu Jan 25, 2007 10:14 pm

it appears that the early ones are all black with a long cable attached, while the later ones have a plug into the body. not sure if the resistance ranges are the same.

Thu Jan 25, 2007 10:37 pm

ravennexus wrote:it appears that the early ones are all black with a long cable attached, while the later ones have a plug into the body. not sure if the resistance ranges are the same.

Cheers
I know they differ in appearance and that the plug is different but i have fitted a later temp sensor to my early obc and it is showing about 90 degree's C at the moment when it is minus something or other

Perhaps this is down to the resistance as you say?

Thu Jan 25, 2007 10:52 pm

more then likely.

same reason why different fuel senders give different readings on different gauges. say the early OBC is set to work with 200-2000ohms and the later sender is 2000-5000ohms then the reading will be all wrong. not sure exactly what the ranges are on both temp senders those are just for example.

Fri Jan 26, 2007 9:14 am

It's supposed to "bong" when you start the car ... if the temp is under 2.5 C

Mon Jan 29, 2007 7:50 am

there is an early one on ebay now

http://cgi.ebay.co.uk/OLD-TYPE-BMW-E30- ... dZViewItem

Mon Jan 29, 2007 9:43 am

there's a couple just need to know how to search.

It's weird being a board that doesn't have a no ebay link posting rule. the old volvo board i'm a morderator on has this policy as peop.............

ahh found it EBAY: Unless you're the seller, its usually not good conduct to broadcast great finds on ebay (especially if there are already bids on it, possible from other tbricks members), as it "steps on toes" of those that spend time looking for good prices.

no worries here though everywhere has different rules.