2012 xdrive50i rough acceleration

[svt1998gt]

Hey guys, waking this back up. So far the car has been in the shop for a week and a half. I had them try everything recommended in this link, and they are testing the alternator. The changed the battery, changed the transmission fluid and pan filter they said it is a little better but still present.

They are not seeing any errors but its still there, we will see when i pick up the car how it runs.

[BlackX5]

I have never seen a transmission Jerk on acceleration and changing the fluid wouldn't help. I suppose the blinker fluid is next.

[TKR]

Did they run all the software test for the injectors? Misfiring, leaks?

[svt1998gt]

Originally Posted by BlackX5

I have never seen a transmission Jerk on acceleration and changing the fluid wouldn't help. I suppose the blinker fluid is next.

They said it helped but the jerk is still there.

Originally Posted by TKR

Did they run all the software test for the injectors? Misfiring, leaks?

I will ask but they said they arent seeing any codes, also when the car is cold the jerk isnt there, after about 5 minutes of driving its gets really bad.

[svt1998gt]

I got the car back and it rides the same, so far i have done the following:
- Change all plugs
- change all coils
- change transmission fluid and filter
- change battery
- ran electrical test
- ran software test
- found that i have index 11 injectors

No check engine light, looking like transmission issue but i have nothing that proves this.

I am game for any other recommendations. hoping to help anyone in the future that has experienced these issues.

Can we log the run and see what data i can pull off the car?

[svt1998gt]

Just remembered there was a recall for the driveshaft, i will take it in this week and see if that fixes the issue.

[Jpinner]

I am also having a problem with my 2011 50i. Was driving normally And suddenly I got a check engine light and idrive saying “engine malfunction, reduced output”. I then got the x5 towed to my usual shop. The check engine light codes were: P0306, 2B1D1, 2B1C1.
The owner of the shop said we can try replace the spark plug and coil pack for cylinder 6 misfire. So he replaced it and no change. aNyone ever have these codes and problems before?car is not drivable, when you rev the engine there is a ticking knocking sound.

[svt1998gt]

Originally Posted by Jpinner

I am also having a problem with my 2011 50i. Was driving normally And suddenly I got a check engine light and idrive saying “engine malfunction, reduced output”. I then got the x5 towed to my usual shop. The check engine light codes were: P0306, 2B1D1, 2B1C1.
The owner of the shop said we can try replace the spark plug and coil pack for cylinder 6 misfire. So he replaced it and no change. aNyone ever have these codes and problems before?car is not drivable, when you rev the engine there is a ticking knocking sound.

I had 2 coils go out which caused this symptom where it wasnt driveable, i ended up changing all plugs and coils in the end just for peace of mind. Are they getting the same codes? have they tried swapping the coil and plug with another cylinder to see if the codes change?

[JoeyBimX5din]

Originally Posted by BlackX5

I have never seen a transmission Jerk on acceleration and changing the fluid wouldn't help. I suppose the blinker fluid is next.

'Jerking' may be a different descriptor to some people then it may be to you. Generally speaking, sometimes a failed torque converter lockup clutch can cause a 'jerking' on acceleration. My Thunderbird does that right now, and it has a bad torque converter, specifically a bad lockup clutch.

[JoeyBimX5din]

Originally Posted by svt1998gt

I got the car back and it rides the same, so far i have done the following:
- Change all plugs
- change all coils
- change transmission fluid and filter
- change battery
- ran electrical test
- ran software test
- found that i have index 11 injectors

No check engine light, looking like transmission issue but i have nothing that proves this.

I am game for any other recommendations. hoping to help anyone in the future that has experienced these issues.

Can we log the run and see what data i can pull off the car?

I think you need a BMW dealer, or a really good indy to dig into some transmission pids and pressure readings. Has anyone said anything about the transfer case? When I change my TC fluid and my indy reset the parameters, he said something to the effect of 'that came back a lot in the settings'. So maybe a quick look at the transfer case? They are known to go bad often.

[svt1998gt]

Originally Posted by JoeyBimX5din

I think you need a BMW dealer, or a really good indy to dig into some transmission pids and pressure readings. Has anyone said anything about the transfer case? When I change my TC fluid and my indy reset the parameters, he said something to the effect of 'that came back a lot in the settings'. So maybe a quick look at the transfer case? They are known to go bad often.

i will give it a shot, I asked the indy follow the recommendations in this thread and that is what they said they did. In the end they didnt do a good job putting the battery cover back on.

I know you are in MD, anyone know of a good indy in so-cal, so far it seems as if the ones with a good reputation are a little lost when it comes to working on an x5.

I need to get the car to the dealer to do some recall work, so i will have them diagnose it and see what they come up with.

[bmwx5er]

Have you checked out https://www.allgermanauto.com/home ? These guys made the n63 valve stem repair tool that allows for doing the job without dropping the engine. I’d give them a shot if you haven’t already.

[svt1998gt]

Originally Posted by bmwx5er

Have you checked out https://www.allgermanauto.com/home ? These guys made the n63 valve stem repair tool that allows for doing the job without dropping the engine. I’d give them a shot if you haven’t already.

Thanks i will do that!

[svt1998gt]

Finally resolved the issue and I would have never guessed it. Found that the outside of my front tires were wearing thin. Took the car in to get a new set of tires and had an alignment done. The car runs fine now. Doesnt make sense to me but I had the alignment done when i bought all 4 new tires 6 months ago but thats about the time the problem started.

So far the car runs like a brand new car now.

[heatmizr]

Hmmm, interesting. Or, could the new rubber be masking it to some degree?
I had what I thought was a TC issue, that 'crabbing' feeling when turning almost full lock in the parking deck... I happened to put new tires on it and it DID feel better... for a few weeks, then it came back.
Turns out the dealer diagnosed the bad TC and replaced 6 days before my warranty ran out (yes!).

So, not sure in your case but be wary of the 'new tires solved it'. Unless somehow your fronts got worn a lot more than the rears, going over the allowable difference, and your new set solved that...?
Pls update if things change.

[svt1998gt]

Originally Posted by heatmizr

Hmmm, interesting. Or, could the new rubber be masking it to some degree?
I had what I thought was a TC issue, that 'crabbing' feeling when turning almost full lock in the parking deck... I happened to put new tires on it and it DID feel better... for a few weeks, then it came back.
Turns out the dealer diagnosed the bad TC and replaced 6 days before my warranty ran out (yes!).

So, not sure in your case but be wary of the 'new tires solved it'. Unless somehow your fronts got worn a lot more than the rears, going over the allowable difference, and your new set solved that...?
Pls update if things change.

I will, but the difference is night and day, not even a hiccup. But i will come back if it starts to have any symptoms.

[JoeyBimX5din]

This is a common issue with many different modern AWD systems (and stability traction systems to), its is not isolated to BMW, so keep that in mind. I have had this before on customer vehicles before.

[svt1998gt]

it was the transfer case all along, figured i would update this thread as the maybe alot of folks experiencing these same issue.

i pulled fuse f92 to diagnose the issue, its in the trunk area, much easier to diagnose this way versus getting under the car and looking for the connector.