Hi - I joined this fantastic forum just today, in order to hopefully get advice from fellow owners with regard to an issue experienced daily.

My wife's R57 (N16) regularly stalls with no check engine light illumination. It does NOT have 'start stop' functionality. This stalling only occurs once the engine is warm, after around 10 mins driving and when the car is either approaching or at a junction (slowing down to a stop / coasting to a stop). Feels like the engine tick over is too low when warm, leading to engine stall. The engine is restarted and we're always able to drive away....until we reach another junction! There aren't any rough running symptoms, no misfires, popping sounds or fluctuations in the tickover rpm. Have watched youtube videos posted of this behaviour, but never any solutions mentioned!

So...being familiar with INPA (I'm an E46 owner), we purchased a cable and software compatible with the R57. The DME has one error logged, 2845 (A8). Trawling the forum, this code appears to indicate a vanos related issue and that the vanos solenoids should be inspected and cleaned or replaced. I'm comfortable tackling that, just waiting for a window of opportunity.

My initial thoughts, given the symptoms, were fuel starvation - possibly due to a clogged fuel filter or failing pump. Looking at the service history, the fuel filter has never been replaced. I was surprised to learn this, given the car is 8 years old...so I searched realoem for the fuel filter part number...and it appears there isn't one!

Is this correct, the 2010 R57 with N16 engine and 40 litre fuel tank doesn't have a fuel filter? Can anyone confirm/deny?

 

There's a filter in the tank.

http://www.realoem.com/bmw/enUS/part...&q=11252754870

 

BMW/Mini intended that the filter not be replaced for the life of the vehicle. However, there is a filter for the R56, which I assume will fit the R57 as well. See ECS Tuning for a part number.


Unless there is noticeable loss of power at/near WOT, I doubt that a fuel starvation problem exists.


Bad VANOS control seems more likely.


Last point: My 2007 R56 is the most difficult vehicle to diagnose of any I've owned over the last 30 years. Thus, be aware that the DTC may only indicate of that condition the ECU fault logic located first, and may only be indicative of symptoms and may not point to the root cause.


Case in point: A bad HPFP will typically cause misfires and set codes P300, P30x, simply because low fuel pressure causes misfires. Not because the coils are at fault.

 

Hi - I used the partial vin "TZ11072" in realoem, leading to the following diagram/parts list:

http://www.realoem.com/bmw/enUS/show...diagId=16_0676

...no corresponding fuel filter.

 

Yes, its the same part. 11252754870

Here is the DIY for the change if you want to tackle that first and check things out.

https://www.northamericanmotoring.co...-change-2.html

I would check the fuel pump itself, for the N16 it does not have the HPFP, just the Low pressure. 16112754806 That would be the next check and make sure the pump is runing and making a whirl noise.

https://www.ecstuning.com/Search/Sit...h/16112754806/

 

You have a MINI One, not a Cooper. Now is see. Yes just the fuel pump. I dont know why there would not be a pre filter, can you check under the rear seat and see what you find it there are 2 cap tops, one on each side.

 

ECS tuning 'vehicle model' drop down list doesn't contain 'Mini One' (this mini is not a 'cooper' model) - maybe this variant is UK only? Engine code is N16B16A.

Power delivery is as expected (unless stalled!)...and no misfires experienced. Only the one error code read from the DME, related to vanos, so as you suggest, bad vanos control seems likely culprit.

 

I lifted the rear bench yesterday to investigate, only one metal 'porthole', under left hand rear seat position.

 

Yes, we dont have the Euro only models, our site is built around US models. But lots of things cross over. See what I posted above on the n16 engine.

Ok, then its got to be a clogged pump or one on its way out. My bet is that the N16 One has a little screen filter before the pump and it may be clogged or the pumps on its way out. If you run the gas low... like only filling up when you are on empty you will pick up junk in the tank from dirty gas stations and sediment.

 

Seems bad practice not to include a replaceable fuel filter. Maybe I'm just behind the times!

 

When the weather abates here I'll remove, clean and replace the 2 vanos solenoids. Then delete errors from the DME, go for a test drive, then re-scan - will report back findings.

 

Great advice, thanks. I'll inspect the pump too when I get an opportunity to work on the car (I don't have a garage to work in).