Lumpy Idle - Starting Problems ....

[AndyBeech]

I'm convinced they could be bought cheaper elsewhere ......
I just got conflicting information from various suppliers about how many pins in the connector ........ and I believe the length of the wire is specific for the Z4 .....
I used the stealers because the had them in stock and ...... if they didn't fit I could drive back there in 10 mins and get them changed.

I reckon I could have got then for about half the price ...... if I had had the time and patience ....

RealOEM lists other models that share the same part as:

11787540167

Lambda probe, black

L= 950MM

Part 11787540167 was found on the following vehicles:
•5' E60   (02/2005 — 02/2007)
•5' E60 LCI   (11/2005 — 12/2009)
•5' E61   (02/2005 — 02/2007)
•5' E61 LCI   (11/2005 — 03/2010)
•6' E63   (02/2005 — 07/2007)
•6' E63 LCI   (04/2006 — 07/2010)
•6' E64   (02/2005 — 07/2007)
•6' E64 LCI   (04/2006 — 07/2010)
•Z4 E85   (11/2004 — 08/2008)
•Z4 E86   (10/2005 — 08/2008)


I've had a google of the part number, doesn't bring up many results, a few American sites that do it cheaper though, notably:

EEuroparts.com,an American site has it for $141, roughly £92 so quite a saving! Basically £200 delivered, don't know how much if anything customs would be on it though. Is it legit though, genuine parts?...and worth the risk...not so sure :/ Anyone here got any experience of them? Any of our American friends maybe? TrustPilot gives them pretty much 5 star reviews...worth a punt maybe?
http://www.eeuroparts.com/Parts/47821/Oxygen-Sensor-15168/

EuroCarParts here offer an apparently BOSCH sensor for £90 each......suspicious?

BMW dealership in America as well would be £340 delivered, but by the time you've paid customs potentially going to be the same as getting them dealers here.


Otherwise it's Soper BMW, £384 for two, delievered, with forum discount......

If anyone knows anywhere else that's cheaper and deffo OEM part, I'm all ears!

 

[AndyBeech]

440 quid for the pair from BMW ........ looked online at various suppliers ( 200 quid the pair ) who all without exception told me that the Z4M is fitted with 5 pin plugs ...... they are not, they have 6 pins. Stealer seemed like the safe option.

Fitted them myself, easy enough if you are a bit spanner savvy ........

Bitter experience in the past with a multitude of old motors ....... have spent many hours trying to fix problems only to find out that the O2 sensors were on their way out.
Now I do the simple things first lololol ........

Can you verify it absolutely had 6 pins/6 wires? Bosch themselves lists the part as 5 wires - so 5 pins presumably...:

Surely BMW don't modify it when they get it from Bosch to add another pin/wire...that would be weird........ Might go and ask BMW if I can have a look at one tomo :|

 

[goon]

My Z has this lumpy idle /low throttle response problem too,its been down the diagnostic route which showed a faulty coolant temp sensor which was replaced and the problem still exists,had the o2 sensors changed a while back,my car gets just local short runs mostly and its not doing it any good I reckon,looking for a new daily driver so I can lay it up for a few months.

 

[teamemmenracing]

Was definitely 6 pins ........... and 5 wires

 

[teamemmenracing]

Just looking at swapping the O2 sensors on my 2006 Jeep Wrangler ......... 40 quid each lolol

 

[goon]

Is there a way of testing these buggers I'm sure one of mine is playing up again and their not that old,cant someone invent a dummy unit that can just plug in and then we can blank them off and save money whilst getting our cars to run properly.

 

[goon]

Did you try lambda sensors.uk they have them listed for z4 3.2 at £47 and £82?

 

[teamemmenracing]

Is there a way of testing these buggers I'm sure one of mine is playing up again and their not that old,cant someone invent a dummy unit that can just plug in and then we can blank them off and save money whilst getting our cars to run properly.

From what I understand there is no simple way of testing wide band lambda sensors ....... which are fitted to the Z4 ....... other than plugging into the car. Then you get a proper readout of how they are performing.

I got one of those Bavaria things .......

 

[Mangozac]

So as someone who is aching to get his hands on a Z4M this is really interesting!

Was definitely 6 pins ........... and 5 wires

5 wires on the sensor itself? Are you able to confirm how many wires are present on the connector that the lambda sensor plugs into?

I just looked up the WDS for the Z4M S54 DME (MSS70) - apparently there are 6 connections (2 for the heater, 4 for the sensor). BUT because this is a wideband sensor and looking at the simplified diagram of the sensor internals, it's possible that not all of the sensor biasing connections are required.

Surely BMW don't modify it when they get it from Bosch to add another pin/wire...that would be weird........ Might go and ask BMW if I can have a look at one tomo :|

They definitely wouldn't. I bet that the 5 pin and 6 pin connectors are compatible (the 5 pin is simply missing one of the pins) and that the DME is smart enough to figure out how to operate either sensor type.

 

[AndyBeech]

So as someone who is aching to get his hands on a Z4M this is really interesting!

Was definitely 6 pins ........... and 5 wires

5 wires on the sensor itself? Are you able to confirm how many wires are present on the connector that the lambda sensor plugs into?

I just looked up the WDS for the Z4M S54 DME (MSS70) - apparently there are 6 connections (2 for the heater, 4 for the sensor). BUT because this is a wideband sensor and looking at the simplified diagram of the sensor internals, it's possible that not all of the sensor biasing connections are required.

Surely BMW don't modify it when they get it from Bosch to add another pin/wire...that would be weird........ Might go and ask BMW if I can have a look at one tomo :|

They definitely wouldn't. I bet that the 5 pin and 6 pin connectors are compatible (the 5 pin is simply missing one of the pins) and that the DME is smart enough to figure out how to operate either sensor type.

The 6th pin is used to calibrate the sensor at the factory, not used when on the car. They will all have the 6th pin, at least from Bosch anyway. Bosch produce the sensor and then the only difference is the length of wire, rather than any differences to the sensor itself. The Z4M specific sensor has a 950mm cable, Bosch's default sensor that can be picked up anywhere for less than half the price of the BMW specific part has a 1000mm cable and is the only difference that I've been able to find. I see no difference from using the default sensor or the BMW part, should produce the same results. I'll confirm Monday if there's any issues as I'm getting them fitted then.

 

[Mangozac]

The 6th pin is used to calibrate the sensor at the factory, not used when on the car. They will all have the 6th pin, at least from Bosch anyway. Bosch produce the sensor and then the only difference is the length of wire, rather than any differences to the sensor itself. The Z4M specific sensor has a 950mm cable, Bosch's default sensor that can be picked up anywhere for less than half the price of the BMW specific part has a 1000mm cable and is the only difference that I've been able to find. I see no difference from using the default sensor or the BMW part, should produce the same results. I'll confirm Monday if there's any issues as I'm getting them fitted then.

But that seems back to front from what teamemmenracing noticed: only 5 wires on the sensor. If it was as you suggest then the sensors would have 6 wires/6 pins and the car would have 5 wires/6 pins. According to WDS the car has 6 wires/6 pins and the Bosch website indicates the sensor has 5 wires/5 pins. The connectors will almost certainly mate regardless of the number of pins populated.

I do agree however that using the generic Bosch part should be successful. Either way we'll find out on Monday

 

[AndyBeech]

Yes it has 5 wires and 6 pins, I guess Bosch plug it into something at the factory which uses the 6th pin to calibrate the resistor(?) in the connector itself and is then redundant on the car. Probably not explained that very well but I've had that confirmed by a few sellers and it's on the Bosch tech literature somewhere. Don't know why the female connector on the car has 6 wires though, don't know enough about that part.

 

[goon]

I'm convinced they could be bought cheaper elsewhere ......
I just got conflicting information from various suppliers about how many pins in the connector ........ and I believe the length of the wire is specific for the Z4 .....
I used the stealers because the had them in stock and ...... if they didn't fit I could drive back there in 10 mins and get them changed.

I reckon I could have got then for about half the price ...... if I had had the time and patience ....

RealOEM lists other models that share the same part as:

11787540167

Lambda probe, black

L= 950MM

Part 11787540167 was found on the following vehicles:
•5' E60   (02/2005 — 02/2007)
•5' E60 LCI   (11/2005 — 12/2009)
•5' E61   (02/2005 — 02/2007)
•5' E61 LCI   (11/2005 — 03/2010)
•6' E63   (02/2005 — 07/2007)
•6' E63 LCI   (04/2006 — 07/2010)
•6' E64   (02/2005 — 07/2007)
•6' E64 LCI   (04/2006 — 07/2010)
•Z4 E85   (11/2004 — 08/2008)
•Z4 E86   (10/2005 — 08/2008)


I've had a google of the part number, doesn't bring up many results, a few American sites that do it cheaper though, notably:

EEuroparts.com,an American site has it for $141, roughly £92 so quite a saving! Basically £200 delivered, don't know how much if anything customs would be on it though. Is it legit though, genuine parts?...and worth the risk...not so sure :/ Anyone here got any experience of them? Any of our American friends maybe? TrustPilot gives them pretty much 5 star reviews...worth a punt maybe?
http://www.eeuroparts.com/Parts/47821/Oxygen-Sensor-15168/

EuroCarParts here offer an apparently BOSCH sensor for £90 each......suspicious?

BMW dealership in America as well would be £340 delivered, but by the time you've paid customs potentially going to be the same as getting them dealers here.


Otherwise it's Soper BMW, £384 for two, delievered, with forum discount......

If anyone knows anywhere else that's cheaper and deffo OEM part, I'm all ears!

Yes Euro carparts Bosch 710111860 lambda sensor £90, same part in carparts 4 less £75, Halfords £137, so at least in this case you havent got to pay through the dealers nose for them ( they are still not cheap though)

 

[teamemmenracing]

No idea how true this is ......... but I was reading a report that a lot of O2 sensors that are being offered for sale at hugely discounted prices are in fact more than 5 years old ...... Not really a problem you would think, but the claim is that the older ones have a 20 to 30 thousand miles lifespan whereas the new ones are supposedly good for over 100 thousand miles .......

 

[Mangozac]

I'll confirm Monday if there's any issues as I'm getting them fitted then.

So how did it go, Andy? What did you get fitted and does it work?

 

[AndyBeech]

I had fitted the one's I mentioned earlier in the thread. (EDIT the M Lambda thread that is). All work fine, no error codes or any issues there, appear to work the same as the one's that came off unsurprisingly seeing as they are basically the same. The sensors that came off were very blackened and dirty as hell, more so the one that has done 70000 miles from new so no doubt a change worth doing at that kind of mileage.
Haven't noted any difference in performance as yet but I only got round to resetting adaptations yesterday before a short drive so I'll report back over time if anything changes.

 

[Mangozac]

Great work! I'd still love to find out why the ECU has provision for 6 wires when the sensor is only 5 though

For anybody stumbling across this the other thread can be found here: http://www.z4-forum.com/forum/viewtopic.php?t=81469

 

[AndyBeech]

No idea, but the BMW one's I've taken off have the same amount of wires / pins on the connector as the one's I've put on so who knows!

 

[Crusoe]

Couple of days since my coil packs and plugs were changed and it seems to have fixed my occasional starting issue (sometimes turned over a bit longer than usual or started first time if I gave it a second attempt. It wasn't bad enough for me to get it looked at straight away but was starting to get more regular). If the lamba doesn't cure it I would check coil packs next, especially if you have a lumpy idle.

 

[AndyBeech]

Couple of days since my coil packs and plugs were changed and it seems to have fixed my occasional starting issue (sometimes turned over a bit longer than usual or started first time if I gave it a second attempt. It wasn't bad enough for me to get it looked at straight away but was starting to get more regular). If the lamba doesn't cure it I would check coil packs next, especially if you have a lumpy idle.

Cheers for the info I would imagine coil packs and plugs is an expensive job though, how much for the lot if you don't mind me asking?