2011 E70 40d - Rear disc brake exploded with biscuit!

[msm]

Could it perhaps be that you had the wrong type of spare wheel with the car. An incorrect wheel offset may push the outside brake calipers down on the disc when bolted on - hence, when you drove off there was pressure on one side of the brake disc causing it to heat up to the point of shattering it.

Just my theory...

 

[DieselFan]

Could it perhaps be that you had the wrong type of spare wheel with the car. An incorrect wheel offset may push the outside brake calipers down on the disc when bolted on - hence, when you drove off there was pressure on one side of the brake disc causing it to heat up to the point of shattering it.

Just my theory...

I also thought this. But then I thought surely the guy would have heard it

Sent from my SM-G935F using Tapatalk

 

[Solo Man]

The marie biscuit spare wheel also has me worried especially on the x drive four wheel X3 and X5 (and others), since the allowable slip on the transfer case is supposed to be 2 or 3%. Am very interested to hear what BMW is going to say/do about it! Please keep us posted. Btw., you should have the transfer box inspected as that could also have been damaged due to the smaller wheel, although you did not go very far on the spare.

---

Just out of curiosity, how did you check your tires the first time the flat tire warning came on? What i do is to physically touch every tire and compare the heat of the tires with each other. On the run flats it is actually very difficult to determine if you actually have a flat tire. Just my 2c.

 

[ChefDJ]

Cars should just be equipped with full size spares as it always has been. Those marie biscuit wheels look so unsafe and people do highway speeds with those things on.

 

[WIDEOPN-X5]

For my money it is another reason why runflat tyres are not all that. OP got the warning about tyre pressure drop. Did everything right. Then, the purpose of the runflat isto be able to allow the car to be driven at a speed of "up to 80km/h (??)" to the nearest tyre shop.

That's all well and good when one is in an urban area..... not so much when you are say halfway between Villiers and Warden on the N3. You can bet your life that "Oom Faan's Tyres Warden" ain't gonna have a runflat for an X3 in stock.

Agree 100% with Chef. Cars should have full size spare and in the case of mixed "wide narrow" then the spare must be a narrow with the same rolling diameter.

Glad you guys got out safely......if it was me I'd have left the fire to spread :rollsmile:..... I wouldn't mind a new X3:roflol:

 

[VictorMike]

Agree 100% with Chef. Cars should have full size spare

YES! Also me, I agree with this one!

#BiscuitsMustaFall

 

[Lizzard]

Well that is if you not driving the other stupid bmw's that doesnt have any spare wheel and solely rely on the run flat to get them to the next city #bmwisamoroon

 

[Craig_Za]

The marie biscuit spare wheel also has me worried especially on the x drive four wheel X3 and X5 (and others), since the allowable slip on the transfer case is supposed to be 2 or 3%. Am very interested to hear what BMW is going to say/do about it! Please keep us posted. Btw., you should have the transfer box inspected as that could also have been damaged due to the smaller wheel, although you did not go very far on the spare.

---

Just out of curiosity, how did you check your tires the first time the flat tire warning came on? What i do is to physically touch every tire and compare the heat of the tires with each other. On the run flats it is actually very difficult to determine if you actually have a flat tire. Just my 2c.

---

When the tyre pressure light came on, I pulled over, and looked and kicked the tire. Been the side of the N3, and very limited in equipment, there wasn't much I could do. So reset the pressure sensor and headed for the closest garage.

Feedback from BMW is not great. They falsely claim that I reset the pressure sensor with the biscuit on the car, sensor was reset, but that was after my inspection. They also claim a warning came on and the mileage was 83km/h. I didnt get a warning on the Idrive or instrument cluster. I also had not changed to the biscuit at this point.

I changed about 5km before the final mileage. And changed the tire by hand (without gloves) There was no heat at that stage. The failure occured in max 5km of driving with the spare wheel.

---

After further chats with BMW SA, they now say they have deferred the case to BMW Germany, but I'm not holding my breath. It basically looks like they use the pro's in the business to make it out that you didn't follow the operating manual and your negligence caused the fault.

 

[TurboLlew]

Less than 5km at 60km/h :shocked:

Disc looks badly scored in the pics (hard to see for sure though) - sure the traction control theory is on the money braking over that whole distance.

Are the x-drive cars that different TC wise though? seems like my TC light flashes often even when I don't think there is any slip. I'd have thought it would be lit up like a Christmas tree before something like this happened

 

[Craig_Za]

Less than 5km at 60km/h :shocked:

Disc looks badly scored in the pics (hard to see for sure though) - sure the traction control theory is on the money braking over that whole distance.

Are the x-drive cars that different TC wise though? seems like my TC light flashes often even when I don't think there is any slip. I'd have thought it would be lit up like a Christmas tree before something like this happened

Ye I also would have guessed they the same, but I must say in the X5 I seldom see the traction control light on. I just assumed it was not doing anything, but it appears that it's working all the time and not letting you know about it.

 

[H|TM@N]

---

After further chats with BMW SA, they now say they have deferred the case to BMW Germany, but I'm not holding my breath. It basically looks like they use the pro's in the business to make it out that you didn't follow the operating manual and your negligence caused the fault.

---

That there, is why I don't want a BMW with Plan. They do everything not to pay nowadays. Back in 2004 they replaced two front seats in my e46 due to rattle. In my ex 1M, they didn't even want to repair a peeling door card. Had to get a M/P representative to speak to me first. Asked a whole bunch of questions and then they just glued the peeling leather back onto the door card. WTF?

BTW, my old e53 X5 has the flashing TC light as soon as the wheels start slipping, and as far as I know, the transfer case and rest of the AWD system hasn't changed much from the days of the e53, the electronics have though. And the e53 still has a full sized spare as well. The good old days...

 

[Blue Shirt]

---

After further chats with BMW SA, they now say they have deferred the case to BMW Germany, but I'm not holding my breath. It basically looks like they use the pro's in the business to make it out that you didn't follow the operating manual and your negligence caused the fault.

---

That there, is why I don't want a BMW with Plan. They do everything not to pay nowadays. Back in 2004 they replaced two front seats in my e46 due to rattle. In my ex 1M, they didn't even want to repair a peeling door card. Had to get a M/P representative to speak to me first. Asked a whole bunch of questions and then they just glued the peeling leather back onto the door card. WTF?

BTW, my old e53 X5 has the flashing TC light as soon as the wheels start slipping, and as far as I know, the transfer case and rest of the AWD system hasn't changed much from the days of the e53, the electronics have though. And the e53 still has a full sized spare as well. The good old days...
[/quote]

---

The early pre-LCI E53 X5's did not have the X-drive system that the LCI E53's and later E70's have, so there are mechanical and electronic differences if you had a pre-LCI car.

 

[H|TM@N]

---

After further chats with BMW SA, they now say they have deferred the case to BMW Germany, but I'm not holding my breath. It basically looks like they use the pro's in the business to make it out that you didn't follow the operating manual and your negligence caused the fault.

---

That there, is why I don't want a BMW with Plan. They do everything not to pay nowadays. Back in 2004 they replaced two front seats in my e46 due to rattle. In my ex 1M, they didn't even want to repair a peeling door card. Had to get a M/P representative to speak to me first. Asked a whole bunch of questions and then they just glued the peeling leather back onto the door card. WTF?

BTW, my old e53 X5 has the flashing TC light as soon as the wheels start slipping, and as far as I know, the transfer case and rest of the AWD system hasn't changed much from the days of the e53, the electronics have though. And the e53 still has a full sized spare as well. The good old days...

---

The early pre-LCI E53 X5's did not have the X-drive system that the LCI E53's and later E70's have, so there are mechanical and electronic differences if you had a pre-LCI car.
[/quote]

---

I have the LCi, hence my comment, that the AWD systems are similar. I get that the electronics will be different.

 

[TurboLlew]

---

After further chats with BMW SA, they now say they have deferred the case to BMW Germany, but I'm not holding my breath. It basically looks like they use the pro's in the business to make it out that you didn't follow the operating manual and your negligence caused the fault.

---

That there, is why I don't want a BMW with Plan. They do everything not to pay nowadays. Back in 2004 they replaced two front seats in my e46 due to rattle. In my ex 1M, they didn't even want to repair a peeling door card. Had to get a M/P representative to speak to me first. Asked a whole bunch of questions and then they just glued the peeling leather back onto the door card. WTF?

BTW, my old e53 X5 has the flashing TC light as soon as the wheels start slipping, and as far as I know, the transfer case and rest of the AWD system hasn't changed much from the days of the e53, the electronics have though. And the e53 still has a full sized spare as well. The good old days...
[/quote]

---

Sorry for the slight diversion: Dealing with the back and forth is still better than no plan IMHO. Some of the aftermarket warranties are not worth the paper they are printed on as many will attest to. I've also had to speak to a technical rep first, replicate the issue as well as have them send large amounts of data to Germany for large claims which is a bit annoying as they follow their processes. I do believe they wouldn't be getting this bad if not for the number of owners who got away with fraudulent claims in the past. It was surprising this didn't happen even sooner. Unfortunately we pay the price for it somewhere. From the stories N54 and N55 owners have on motorplan extension costs (many times more than M5/6), I can only assume they are trying to discourage owners from extending plan or trying to replenish the fund.

 

[KingKeith]

That's just crazy, glad it did not cause an accident.

 

[Yuben]

Agree 100% with Chef. Cars should have full size spare

YES! Also me, I agree with this one!

#BiscuitsMustaFall

And how about going back to full size spares and non run flats tyres? The ride will be 200% better compared to the runflat ride and changing a tyre has never been an issue before should the need arise.

I'm battling to understand what BMW is trying to get you to pay for by trying to shift the blame onto you by the looks of trying to repudiate and absolving themselves from any responsibility :RedNo:

 

[msm]

Out of curiosity, please can I request some info: Can you please provide the size of the spare tyre and size of the original rear tyre? Surely the rolling diameter should be almost the same, which negates the issue of any difference between the axle. If not, it would actually be BMW's fault in not providing the correct spare size for the vehicle.

 

[Craig_Za]

Out of curiosity, please can I request some info: Can you please provide the size of the spare tyre and size of the original rear tyre? Surely the rolling diameter should be almost the same, which negates the issue of any difference between the axle. If not, it would actually be BMW's fault in not providing the correct spare size for the vehicle.

Hey so the short answer is I'm not sure. The car was towed to Boksburg and still sitting there. I see it listed as follows in the original car description.

Extra options
Manufacturer Fitted
Code Description
300 Emergency spare wheel

According to another forum, he says the OEM wheel is 155/90-18. Sure this was the OEM, it had the original stickers from manufacturing, and clearly had never been used. (I did buy this car 2nd hand).

I will try get out there with the insurance assessors next week and double check. But I'm sure BMW would have thrown this out very quickly, had I been driving on a under specced wheel.

 

[WIDEOPN-X5]

So what was the outcome of this ?

 

[Craig_Za]

So what was the outcome of this ?

BMW came back saying they will cover the cost of the repair. They then going to upgrade the DSC software, and do a test with the spare wheel on the rear right side.

The dealer is busy sourcing the parts, hoping it's repaired early next week.