Idle Problem

[It's Good]

BMW has "opened a case" on an idle problem I brought up during the first service on the car.When I'm at a stop,the engine is off,I release the brake,and the engine restarts,the idle is rough and actually shakes the car. It seems to smooth out a little after 15-20 seconds.It seems like a relatively simple problem but they haven't diagnosed it yet after 4 days.Corporate will not release the car so I'm taking the loaner (with the dealer's knowledge) on a 400 mile road trip.The 740i is nice except for the wind noise I mentioned in another post.I'm lucky to have that!I could have the Echo the same dealer stuck me with 18 years ago when I took my '06 in.Ha!Any other members experiencing the same problem?

[dcfl39]

I am having the same exact problem and am brining the car in next week. What did the dealer say was wrong with yours?

[pegogetem]

Originally Posted by It's Good

BMW has "opened a case" on an idle problem I brought up during the first service on the car.When I'm at a stop,the engine is off,I release the brake,and the engine restarts,the idle is rough and actually shakes the car. It seems to smooth out a little after 15-20 seconds.It seems like a relatively simple problem but they haven't diagnosed it yet after 4 days.Corporate will not release the car so I'm taking the loaner (with the dealer's knowledge) on a 400 mile road trip.The 740i is nice except for the wind noise I mentioned in another post.I'm lucky to have that!I could have the Echo the same dealer stuck me with 18 years ago when I took my '06 in.Ha!Any other members experiencing the same problem?

Yes, I’m also having rough idle at start up.

[It's Good]

BMW replaced all 8 injectors and the problem is still there.Again, it only happens when the ASS cuts the engine and then restarts through a brake release or A/C demand.It doesn't happen on start up or in sport mode.It will idle roughly for 8-10 seconds and then slowly start to smooth out.I feel it may have something to do with the ASS but that hasn't gotten much traction with them.Right now I'm living with it and will mention it again when I'm in for service.It's been out of service for 25 days in 10 months so I'm not looking for more down time.

[pegogetem]

Originally Posted by It's Good

BMW replaced all 8 injectors and the problem is still there.Again, it only happens when the ASS cuts the engine and then restarts through a brake release or A/C demand.It doesn't happen on start up or in sport mode.It will idle roughly for 8-10 seconds and then slowly start to smooth out.I feel it may have something to do with the ASS but that hasn't gotten much traction with them.Right now I'm living with it and will mention it again when I'm in for service.It's been out of service for 25 days in 10 months so I'm not looking for more down time.

I notice my engine moves a little more than I assumed it’s supposed to move. I’ll get them to check my mounts. It shakes the entire car when I just tap the gas so I’m wondering if weak mounts are exaggerating the engine idle.

[pegogetem]

Originally Posted by It's Good

BMW replaced all 8 injectors and the problem is still there.Again, it only happens when the ASS cuts the engine and then restarts through a brake release or A/C demand.It doesn't happen on start up or in sport mode.It will idle roughly for 8-10 seconds and then slowly start to smooth out.I feel it may have something to do with the ASS but that hasn't gotten much traction with them.Right now I'm living with it and will mention it again when I'm in for service.It's been out of service for 25 days in 10 months so I'm not looking for more down time.

What was the outcome on this?

[pegogetem]

Originally Posted by dcfl39

I am having the same exact problem and am brining the car in next week. What did the dealer say was wrong with yours?

Any update?

[jacobkaan]

Following, i have same issue please share any update

[BMW5and7]

Originally Posted by pattyolighter

I have the same issue with a CPO 2023 760i 25k miles. Rough idle, smooth out on acceleration. Multiple tests have been done including compression test for the last 3 weeks. Finally heard back from BMW NA-> engine head needs to be replaced. Now no ETA on part delivery may need to be shipped from Germany. What a headache! Should I ask for a compensation?

Oh my goodness…This really frightening, sorry to hear about that.
I notice a substantial number of owners here on this subforum with same issue, which is quite surprising considering the relatively small size of this community for the new G70 in general with 760 specifically. Sounds like the 760 should be avoided in the meantime... I really hope BMW will issue a TSB soon to expedite solving this same issue for those who are still trying to address it.

Compensation I guess depends don how quickly they can fix the issue. Do you think you can ask them to buyback the car? By the way, new cylinder heads for both banks may require the entire engine to be removed (or at least most techs would prefer to do it that way). For the N63 engine, even if the tech decides tp keep the engine in without full removal, it would require removing the rear bumpe to pull the entire exhaust system and transmission backward before removing the upper catalytic converters to begin the process of removing cylinder heads while engine is in. Still heavily involved process. Best of luck; keep us posted.

[It's Good]

I was asked,as the OP, about outcome on my '23 760i.The problem was still there when I traded for my '25 in Oct. '24.Sounds like a major structural problem with the engine.I will be tracking developments since the plan is to go with an LCI '27 about a year from now.Again,have noticed intermittent minor vibration on the '25.

[BMW5and7]

Originally Posted by It's Good

I was asked,as the OP, about outcome on my '23 760i.The problem was still there when I traded for my '25 in Oct. '24.Sounds like a major structural problem with the engine.I will be tracking developments since the plan is to go with an LCI '27 about a year from now.Again,have noticed intermittent minor vibration on the '25.

If I were you, I wouldn’t even consider getting a 27’ LCI if it comes with the same engine. Considering the number of reported issues and the number of sample size on this subforum alone, there seem to be some serious problems with this engine for the 760 that I wouldn’t want to risk being in another 760 with that same engine. The sample size on this subreddit alone is large enough to prove a common, systematic issue that isn’t isolated or minor. When I had similar issue with our first LCI X7, we bareky drove it for a few days, that I sometimes even forget that we owned that one, before BMW moved us to another X7 M60. They couldn’t address the issue after 2 weeks but they confirmed there could be some serious drivetrain issue… and since I’ve only had it for a few days and few miles on the car, putting me in another X7 was an easy switch for everyone involved.

That issue alone was one reason I really appreciated the BMW brand and am still loyal to it for how professionally they handled it. But at the same time, it was one reason we heavily count on our GLS with the inline-6 as the ultimate and best family-hauler for long-trips. Super reliable, ZERO issues, never seen the shop other than for an oil change and evap sensor.

[AlteBMW]

This is all a bit surprising because the 6 cylinder BMW engine is supposed to be bulletproof.

[BMW5and7]

Originally Posted by AlteBMW

This is all a bit surprising because the 6 cylinder BMW engine is supposed to be bulletproof.

If you track the other threads, the majority (if not actually all) the engine issues are for the 760 with the V8 (S68 engine). Several reports on this sub-forum for misefires or shudder issues, one or more said they’ll do cylinder heads replacements, and another case for complete engine replacement.

[pcgeek]

FWIW, this is the main thing that drove me to an EV.

Every generation of every engine from just about every company except Toyota seems to have the one weak-point that you have to watch out for. With BMW it seemed like it was usually a problem of fluids of some kind going where they shouldn't (coolant usually). With Porsche it was IMS bearings or random other bits. With Audi it was timing chain idler pullies, etc.

I'm sure the EV's will have their own generational problems, particularly since automakers aren't exactly known for their software, and there have been more HV recalls than I'd like but it feels like there's just a lot less to go wrong.

[AlteBMW]

Originally Posted by BMW5and7

If you track the other threads, the majority (if not actually all) the engine issues are for the 760 with the V8 (S68 engine). Several reports on this sub-forum for misefires or shudder issues, one or more said they’ll do cylinder heads replacements, and another case for complete engine replacement.

Yes I know of the S68 issues.
The OP said he has a 740 which is a 6 and that is what prompted my puzzlement.

[BMW5and7]

Originally Posted by AlteBMW

Yes I know of the S68 issues.
The OP said he has a 740 which is a 6 and that is what prompted my puzzlement.

No, he has a 760.
I believe he was saying that he got a 740 as a loaner while his 760 is being serviced.

All the idle issues seen so far were for 760 V8.

[AlteBMW]

Originally Posted by BMW5and7

No, he has a 760.
I believe he was saying that he got a 740 as a loaner while his 760 is being serviced.

All the idle issues seen so far were for 760 V8.

I stand corrected. For the record, I've not had any rough idle issues ('23 760). Keeping my fingers crossed.

[Mrproper86]

My wife dailys her 24 740i since last year. We put 27.000miles on it and experience just about zero issues besides some minor glitches which where mostly related to software updates. Engine runs strong and feels amazing.

[jha96]

Originally Posted by Mrproper86

My wife dailys her 24 740i since last year. We put 27.000miles on it and experience just about zero issues besides some minor glitches which where mostly related to software updates. Engine runs strong and feels amazing.

27k miles a year is insane but glad there are no issues seeing as I have the same car.

[solo118]

I notice a little bit of a shudder, but nothing severe enough to take it in.... at any rate, since they activated the option to turn of ASS, I turn it off every time I drive in normal mode.

[BMW5and7]

Originally Posted by solo118

I notice a little bit of a shudder, but nothing severe enough to take it in.... at any rate, since they activated the option to turn of ASS, I turn it off every time I drive in normal mode.

He explicitly stated that 75K is the “due” amount. Therefore, I believe he intended to convey that this is the amount he must pay by the end of the lease to acquire the car, which is reasonable for 2,500 CAD.

[pegogetem]

Any solid information on the issue?