rough idle when cold

[Nick9one1]

Nope, 23i isn't direct injection-the n54 and n20 engines are but the m54 /n52 engines are not
Rob

Robs correct, just checked realoem. It has no HPFP and standard injectors.

23i IS NOT direct injection
28i IS direct injection

http://www.realoem.com/bmw/enUS/showparts?id=LM32-EUR-05-2010-E89-BMW-Z4_23i&diagId=13_1186

 

[Nick9one1]

£102 is a great price for an injector from Sopers. Last time I looked, they were nearer £200 ech. Sounds like you have illiminated coil packs so injectors will certainly be next on the suspect list.

Yeah I was pleasantly surprised!

I'm going to swap all of bank 1 (cylinders 1,2,3), to begin with.

 

[ph001]

£102 is a great price for an injector from Sopers. Last time I looked, they were nearer £200 ech. Sounds like you have illiminated coil packs so injectors will certainly be next on the suspect list.

Yeah I was pleasantly surprised!

I'm going to swap all of bank 1 (cylinders 1,2,3), to begin with.

I suppose that will give you a good idea of what's involved but I bet you will need to swap the other bank as well within 12 months. If possible, it would be super to have a good DIY guide for the forum. I think the vast majority of people have had them done under warranty but you can be sure there are lots of cars falling out of warranty over the next few years so I think a good guide would be very valuable.

 

[Nick9one1]

Yeah I'm pretty sure I'll have to change the remaining three before long.

 

[mcbutler]

Nope, 23i isn't direct injection-the n54 and n20 engines are but the m54 /n52 engines are not
Rob

Robs correct, just checked realoem. It has no HPFP and standard injectors.

23i IS NOT direct injection
28i IS direct injection

http://www.realoem.com/bmw/enUS/showparts?id=LM32-EUR-05-2010-E89-BMW-Z4_23i&diagId=13_1186

OK, in that case where are the 23i injectors mounted, in realoem I cannot see any mount or hole on the inlet manifold?? Do they go into the port before the inlet valve? i.e. mounted on the head?

 

[Smartbear]

Nope, 23i isn't direct injection-the n54 and n20 engines are but the m54 /n52 engines are not
Rob

Robs correct, just checked realoem. It has no HPFP and standard injectors.

23i IS NOT direct injection
28i IS direct injection

http://www.realoem.com/bmw/enUS/showparts?id=LM32-EUR-05-2010-E89-BMW-Z4_23i&diagId=13_1186

OK, in that case where are the 23i injectors mounted, in realoem I cannot see any mount or hole on the inlet manifold?? Do they go into the port before the inlet valve? i.e. mounted on the head?

Yes, they inject into the inlet port (keeping the inlet valves clean) but not directly into the combustion chamber
Rob

 

[Nick9one1]

I've got a feeling the new injectors will never come into stock.
The availability date has been pushed back three times now.

From what I've been told,

13-53-8-648-937 (£102) is used by dealers when repairing under warranty (so they are less out of pocket until the reimbursement comes back from BMW)
13-53-8-616-079 (£240) is what the dealer wants to sell you

They are exactly the same injector.

 

[Smartbear]

I've got a feeling the new injectors will never come into stock.
The availability date has been pushed back three times now.

From what I've been told,

13-53-8-648-937 (£102) is used by dealers when repairing under warranty (so they are less out of pocket until the reimbursement comes back from BMW)
13-53-8-616-079 (£240) is what the dealer wants to sell you

They are exactly the same injector.

I wonder why they’ve given them different part numbers if they really are the same part? It makes no sense :?
Rob

 

[Nick9one1]

The code printed on the injector is 13-537-585-261 12 no matter which part number you order.

13-53-8-648-937
13-53-8-616-079



This article gives a bit more information..

The key bit being

There is no difference between 13538648937 and 13538616079 in terms of quality. The injectors are identical in every measurable way. Originally, the 937 injector was the improved version as part of the TSB but now both part numbers have the improved version. Why does the 937 injector cost less? It costs less because it's more of the true cost of the part. This reduces the cost the dealerships need to inherit for warranty work on a common failure item until reimbursement from BMW. The separate numbers are also established to artificially decrease the reported failure rate. One part is to handle the warranty and recall claims (not reported) and the other is strictly for retail and regular service work (more profit).

 

[Gaffa22]

Nick I don't think you can mix index 12 with index 7 so you might have to get all 6
the injectors (pt no 648937) you have been quoted £102 are index 12 and are slightly different to the pt no 616079

 

[Nick9one1]

Nick I don't think you can mix index 12 with index 7 so you might have to get all 6
the injectors (pt no 648937) you have been quoted £102 are index 12 and are slightly different to the pt no 616079

Yep you're right. But it's per bank you cant mix them.
Bank 1 is cylinders 1,2,3. Bank 2 is Cylinders 4,5,6.

I get errors are on cylinders 1 & 3 (both bank one). So I'm fine replacing injectors 1,2,3 without 4,5,6.

According to this article, injectors 937 and 079 are identical.

 

[Gaffa22]

Yep you're right. But it's per bank you cant mix them.
Bank 1 is cylinders 1,2,3. Bank 2 is Cylinders 4,5,6.

I get errors are on cylinders 1 & 3 (both bank one). So I'm fine replacing injectors 1,2,3 without 4,5,6.

Ah yes I see, I was thinking of just biting the bullet and replacing all of mine, as it can only be a matter of time before they all start leaking
I currently only have two leaking, and only get the rough idle and misfire if i don't start the car for a couple of weeks.
If I leave it for just 1 week it starts and idles fine.

 

[Nick9one1]

Mine is a little worse than yours by the sound of it. I get a rough idle when left overnight.

If you're willing to import, there are some cheap ones on eBay with the latest part number.
https://www.ebay.co.uk/itm/382380288904?ViewItem=&item=382380288904

They're from a BMW dealership and come in at £120 each including shipping and import tax.

 

[Gaffa22]

Mine is a little worse than yours by the sound of it. I get a rough idle when left overnight.

If you're willing to import, there are some cheap ones on eBay with the latest part number.
https://www.ebay.co.uk/itm/382380288904?ViewItem=&item=382380288904

They're from a BMW dealership and come in at £120 each including shipping and import tax.

Yes they are obviously not too bad but I have a warranty till October so will see if they will pay some towards the cost.
If I have to buy them myself I can get them for £95 plus vat, so would do that rather than import them.

 

[Nick9one1]

That's a good price. I was quoted £85 + VAT by a dealer in Lincoln. Problem is they're out of stock everywhere. The dealer originally gave me an date of 20th Jan to arrive into Germany (+1 week to UK). That got pushed back until the 28th and now the 19th Feb.

I tried a few other dealers but nowhere stocks them, they're a special order item from Germany.

 

[Gaffa22]

That's a good price. I was quoted £85 + VAT by a dealer in Lincoln. Problem is they're out of stock everywhere. The dealer originally gave me an date of 20th Jan to arrive into Germany (+1 week to UK). That got pushed back until the 28th and now the 19th Feb.

I tried a few other dealers but nowhere stocks them, they're a special order item from Germany.

For £85 + VAT you should order them that's a really good price.
My mate who's a parts dealer could not get them that cheap. I know BMW UK are expecting stock, I was told 5th Feb but that obviously didn't happen

 

[Nick9one1]

I think that's the going rate. I called four different dealers to see if they had stock and all quoted the same price.

They told me once ordered I couldn't request a refund or return. As they keep getting pushed back I've got not idea when they might come into stock. Could be months!

That's why I was tempted in ordering from the US. pretty much the same price and guaranteed to arrive in a week.

 

[Nick9one1]

I took a gamble on some brand new injectors from eBay in the UK. Paypal is pretty good at protecting the buyer, so I knew I could send them back if they turn out not to be brand new.

They turned up this morning. And they are brand new as far as I can tell. All the seals/caps are on. No installation or tool marks, dont smell of petrol.

Took about an hour to install and code.

First start took about 10 seconds and I was starting to get worried! But I think they just needed an initial prime.

The real test will be tomorrow morning once the cars sat overnight, although I'm pretty confident they have solved my rough running issue mas the car is already running better than it ever has.

Not bad for £350 and 1 hour of my time!

 

[Gaffa22]

That's a good deal, did they have any more or just the six you bought ?

 

[Nick9one1]

I'm afraid not. He only had the 6.