[NKOTB2015]

Just wanted to give a quick update after the weekend...
check the rear suspension components but couldn't find anything obvious...did increase the rear tire air pressure to 36psi as suggested by leftoverture and it seemed to help some. I'll need to make time this week and drive back out to the road where the symptom appeared to be pronounced and see.

As a side note, I'm really starting to hate these RFTs...was planning to wait till next spring but I'll pbly change the tires out to regular non-RFTs soon.

[Dom147]

what exactly did you check when you say you checked the suspension? I'd have the rear of the car in the air and try to twist and pulll on each of the arms and visually inspect the bushings as well.

What mode are you driving in btw?

[NKOTB2015]

Originally Posted by Dom147

what exactly did you check when you say you checked the suspension? I'd have the rear of the car in the air and try to twist and pulll on each of the arms and visually inspect the bushings as well.

What mode are you driving in btw?

This. Increasing the rear tire pressure feels like helped some but i'm still not happy...i'm planning to get it back up and do another round of inspections...thinking maybe using a mallet this time and tap on the suspension components to see if I can hear any differences in noise (thinking maybe a loose connection will make a diff sound...but not sure)

I'm usually in sport mode after the car warms up.

[BringBackButtons]

Oh....
Run flats?

Interesting twist. Id be interested to see if that is playing a part in this or not...what is the age on them???

[leftoverture]

I don't think RFTs have much to do with this.

[NKOTB2015]

Originally Posted by BringBackButtons

Oh....
Run flats?

Interesting twist. Id be interested to see if that is playing a part in this or not...what is the age on them???

3yrs old

[NKOTB2015]

Originally Posted by leftoverture

I don't think RFTs have much to do with this.

I don't think so either...I just hate the ride on the RFTs

[morphomeman]

RFTs are a convenient scapegoat for many ills. But they are a blessing when you get to be as old as I am.

[BringBackButtons]

I didnt say it was, i just have experience with older rfts that looked healthy, but turned harder than normal and lost performance quicker than anticipated.

Some people who only drive a couple thousand a year think their tires will last 10 years.

I didnt assume it its the smoking gun, just part of the equation that hadnt been defined... and wondered their age. Im no expert beyond old rft arent ideal.

Carry on the scientific analysis, interested to hear what you find out!

[XutvJet]

RFT tires are trash and get worse with age. Most tires are degraded by year 3 and start to get slick/hard.

A few questions:

1) What is the car in questions and how long have you owned it?
2) Did this issue pop up with a change to cooler weather?
3) What are your power modifications, if any?
4) When this issue happens, are you driving aggressively?
5) If driving aggressively, are you shifting when in a turn?
6) RWD or xdrive and if RWD, is it equipped with an LSD?

FYI, driving aggressively while in a turn and abruptly letting off the gas will often result in the rear end stepping out or the car feeling loose. Same goes for if you're adding power through a turn. When driving aggressively in a turn, you hold your speed or lift slightly or add a tiny bit of braking if you feel the car getting out of control.

At the surface, this sounds to me like you may be driving a bit too aggressive for a RWD-biased car assuming you are talking about a real 2 series (i.e., not that front wheel drive crap current gen M235).

[Ericwd]

Hi all. First post!
I just picked up a 2017 F23 MT convertible. I've been experiencing a similar issue. However, in my case, the traction control light comes on when I'm in a sweeper corner, or turning aggressively. It took me a while to realize what was happening, but the stability system is trying to correct and keep the vehicle from going out of control. When this happens, it feels as if the car is sliding on ice, just on the verge of going out of control, but doesn't. It's very un-nerving. If I put the part in Sport + mode, then it drives normal.
I'm dropping the car off at my local bimmer shop today. I'm assuming that I have a yaw sensor, or something similar, that's bad.
Have you tried to turn off traction control to see if it helps?
I'll update with findings.

[leftoverture]

Originally Posted by morphomeman

RFTs are a convenient scapegoat for many ills. But they are a blessing when you get to be as old as I am.

Right?! I am grateful for my RFTs. They saved me once already and they are quite and handle really good for an all season tire.

[leftoverture]

Originally Posted by XutvJet

RFT tires are trash and get worse with age. Most tires are degraded by year 3 and start to get slick/hard.

Now that's a very subjective opinion not based on fact. If you don't like RFT's that's understandable, but they are not trash. I've been very happy with mine.

[NKOTB2015]

Originally Posted by XutvJet

RFT tires are trash and get worse with age. Most tires are degraded by year 3 and start to get slick/hard.

A few questions:

1) What is the car in questions and how long have you owned it? 2015 M235i F23. Owned since March 2024.
2) Did this issue pop up with a change to cooler weather? No
3) What are your power modifications, if any? None
4) When this issue happens, are you driving aggressively? No. Usually feel it in my gut when getting on off ramps from highway at normal speed, or taking a steady sweeper turn on smooth roads.
5) If driving aggressively, are you shifting when in a turn? No
6) RWD or xdrive and if RWD, is it equipped with an LSD? RWD. Unknown on the LSD, but I'm guessing no.

FYI, driving aggressively while in a turn and abruptly letting off the gas will often result in the rear end stepping out or the car feeling loose. Same goes for if you're adding power through a turn. When driving aggressively in a turn, you hold your speed or lift slightly or add a tiny bit of braking if you feel the car getting out of control.

At the surface, this sounds to me like you may be driving a bit too aggressive for a RWD-biased car assuming you are talking about a real 2 series (i.e., not that front wheel drive crap current gen M235).

See above for responses. One more interesting bit...the symptom feels worse (in my guts) while taking left turns than right. Again, it's not actually losing traction and sliding out (I don't have the balls to keep pushing to see if I actually slide out lol)...just feel it in my gut.

[NKOTB2015]

Originally Posted by leftoverture

Now that's a very subjective opinion not based on fact. If you don't like RFT's that's understandable, but they are not trash. I've been very happy with mine.

The RFTs performed fine (till this recent issue, which may not be the RFTs). I just don't like the ride...my dislike may be due to the fact that I regularly drive on less than ideal road surfaces (potholes, across train tracks, etc). It's been decades since I've had a flat tire so loss in ride comfort doesn't feel worth it to me (knock knock).

[NKOTB2015]

Originally Posted by Ericwd

Hi all. First post!
I just picked up a 2017 F23 MT convertible. I've been experiencing a similar issue. However, in my case, the traction control light comes on when I'm in a sweeper corner, or turning aggressively. It took me a while to realize what was happening, but the stability system is trying to correct and keep the vehicle from going out of control. When this happens, it feels as if the car is sliding on ice, just on the verge of going out of control, but doesn't. It's very un-nerving. If I put the part in Sport + mode, then it drives normal.
I'm dropping the car off at my local bimmer shop today. I'm assuming that I have a yaw sensor, or something similar, that's bad.
Have you tried to turn off traction control to see if it helps?
I'll update with findings.

No traction control light for me, plus I rarely drive aggressively. I think I'll drive the same section of the road (where I feel the symptom) in different modes and see if it feels any different...yes, please let me know what the shop says, please.

[NKOTB2015]

Originally Posted by BringBackButtons

I didnt say it was, i just have experience with older rfts that looked healthy, but turned harder than normal and lost performance quicker than anticipated.

Some people who only drive a couple thousand a year think their tires will last 10 years.

I didnt assume it its the smoking gun, just part of the equation that hadnt been defined... and wondered their age. Im no expert beyond old rft arent ideal.

Carry on the scientific analysis, interested to hear what you find out!

Not trying to give you a hard time at all, and I don't think @leftoverture is either. What limited dialogs I've had with him in the past has always been pleasant and he's always helpful in my experience.

[XutvJet]

Originally Posted by leftoverture

Now that's a very subjective opinion not based on fact. If you don't like RFT's that's understandable, but they are not trash. I've been very happy with mine.

Naaa...they're trash. They suffer sidewall blow outs by a far greater margin than standard tires, especially these cars with short 40 series profile rubber. Sure, you can drive on a flat for a little while, but when the likelihood of full on tire failure is dramatically higher, not sure what real benefit is. Don't believe me? Search "tire blowout m235" or any other BMW model that is outfitted with RFTs. These tires do not handle potholes well compared to standard tires. It's the price you pay for the stiff sidewall tech.

They ride worse/harder than a standard tire.

They are louder than a standard tire.

They wear faster than a standard tire.

Did I mention the sidewall blow outs?

[leftoverture]

Originally Posted by NKOTB2015

The RFTs performed fine (till this recent issue, which may not be the RFTs). I just don't like the ride...my dislike may be due to the fact that I regularly drive on less than ideal road surfaces (potholes, across train tracks, etc). It's been decades since I've had a flat tire so loss in ride comfort doesn't feel worth it to me (knock knock).

I've had a flat on each of my vehicles in the last year. One was a screw I picked up and the other (with the RFTs) was some debris that sliced my sidewall. Instant tire pressure loss. I barely slowed down and easily made it the 3-4 miles to the nearest Discount Tire.

[leftoverture]

Originally Posted by XutvJet

Naaa...they're trash. They suffer sidewall blow outs by a far greater margin than standard tires, especially these cars with short 40 series profile rubber. Sure, you can drive on a flat for a little while, but when the likelihood of full on tire failure is dramatically higher, not sure what real benefit is. Don't believe me? Search "tire blowout m235" or any other BMW model that is outfitted with RFTs. These tires do not handle potholes well compared to standard tires. It's the price you pay for the stiff sidewall tech.

They ride worse/harder than a standard tire.

They are louder than a standard tire.

They wear faster than a standard tire.

Did I mention the sidewall blow outs?

Again, your opinion. Not my experience. Not at all. My Driveguard Plus RFTs have been fantastic, smooth, far quieter than the original Pirellis, superior traction on wet roads, and they seem to be wearing well. I'm very satisfied with them. I have the 17" wheels so better side wall aspect ratio.

[BringBackButtons]

Originally Posted by NKOTB2015

Not trying to give you a hard time at all, and I don't think @leftoverture is either. What limited dialogs I've had with him in the past has always been pleasant and he's always helpful in my experience.

None taken, i figure trying to help is the ultimate goal. Data is important, wrong right or otherwise, I just wanted to know if that data was a consideration as you can see, rft is a divisive function between individuals. Ultimately, I believe a few factors may be at play. Is this one of them in some slight or degree? Maybe, maybe not. Opinions are like....well, we all know the rest.

How it plays out from here to be fixed and get us up to back and running confidently is all i care about! Im an diy mechanic that has had his fair share of upkeep on a much heavier awd platform than the f2x platform, so if i see something I can further provide constructive input on, ill supply.

[Ericwd]

Originally Posted by Ericwd

Hi all. First post!
I just picked up a 2017 F23 MT convertible. I've been experiencing a similar issue. However, in my case, the traction control light comes on when I'm in a sweeper corner, or turning aggressively. It took me a while to realize what was happening, but the stability system is trying to correct and keep the vehicle from going out of control. When this happens, it feels as if the car is sliding on ice, just on the verge of going out of control, but doesn't. It's very un-nerving. If I put the part in Sport + mode, then it drives normal.
I'm dropping the car off at my local bimmer shop today. I'm assuming that I have a yaw sensor, or something similar, that's bad.
Have you tried to turn off traction control to see if it helps?
I'll update with findings.

Updating my earlier report.
Nothing is wrong with the traction control system. There are two primary issues. The first is that the alignment was out by a degree in both rear wheels. The tow in rear was also out so that both rears were thrusting to one side.
Alignment fixed 75% of the problem.
HOwever, I still get the TCS light when driving "spirited" in sweepers. But in conditions that should not be producing significant tire slip. So that leads me to my next conclusion, which issue is that the car is on the Pirelli run-flats. This was my original suspicion since I've only had a one set prior, and did not enjoy those. I've reduced air pressure and that bought me a bit more control. I plan on changing, but need to do some more thinking on ideal set: square versus staggard tire set, as I'm just learning this chassis and it's characteristics....
I'm not after looks with wheel/tire, just trying to improve balance and feel.