Puncture in rear wheel not detected

[TomZ4]

I had puncture on the way to work yesterday and my tyre was completely flat, however, the TWPS didn't alarm out all I could hear is the noise and feel poor steering.

I had a puncture in the front wheel as well a few months back but the TWPS alarmed out instantly.

Is there anything I can do to make sure TWPS will work in case this happens again?

 

[Zforbes]

If I understand correctly pre LCI cars like yours and mine have puncture warning systems rather than pressure warning. I believe this works using the wheel speed sensors rather than pressure sensor in the wheel itself. The flaw is slow reduction in pressure isn't captured. It works by calculating the difference in rotation and I think also the steering angle.

You can't rely on this sort of set up to detect a slow reduction in pressure, my guess is you've had the puncture longer than you think and you should keep an eye on your pressures like you should on a car without this kind of set up.

That's my understanding and open to be corrected

 

[ronk]

Thats how it was explained to me as well

 

[Pondy]

If I understand correctly pre LCI cars like yours and mine have puncture warning systems rather than pressure warning. I believe this works using the wheel speed sensors rather than pressure sensor in the wheel itself. The flaw is slow reduction in pressure isn't captured. It works by calculating the difference in rotation and I think also the steering angle.

You can't rely on this sort of set up to detect a slow reduction in pressure, my guess is you've had the puncture longer than you think and you should keep an eye on your pressures like you should on a car without this kind of set up.

That's my understanding and open to be corrected

My LCI doesn't have sensors in the wheels.

My understanding was with all E89s it is a by-product of the ABS, by measuring rolling radius with each rotation. It may be different and may also be different on cars with Idrive that have a more sophisticated system.

Could be wrong. Won't be the first or last

 

[Zforbes]

If I understand correctly pre LCI cars like yours and mine have puncture warning systems rather than pressure warning. I believe this works using the wheel speed sensors rather than pressure sensor in the wheel itself. The flaw is slow reduction in pressure isn't captured. It works by calculating the difference in rotation and I think also the steering angle.

You can't rely on this sort of set up to detect a slow reduction in pressure, my guess is you've had the puncture longer than you think and you should keep an eye on your pressures like you should on a car without this kind of set up.

That's my understanding and open to be corrected

My LCI doesn't have sensors in the wheels.

My understanding was with all E89s it is a by-product of the ABS, by measuring rolling radius with each rotation. It may be different and may also be different on cars with Idrive that have a more sophisticated system.

Could be wrong. Won't be the first or last

We agree on the system and how it works, mine is pre LCI so puncture warning for sure, I thought newer LCI cars had the sensors but maybe not :yu:

 

[Argyll Andy]

If I understand correctly pre LCI cars like yours and mine have puncture warning systems rather than pressure warning. I believe this works using the wheel speed sensors rather than pressure sensor in the wheel itself. The flaw is slow reduction in pressure isn't captured. It works by calculating the difference in rotation and I think also the steering angle.

You can't rely on this sort of set up to detect a slow reduction in pressure, my guess is you've had the puncture longer than you think and you should keep an eye on your pressures like you should on a car without this kind of set up.

That's my understanding and open to be corrected

My LCI doesn't have sensors in the wheels.

My understanding was with all E89s it is a by-product of the ABS, by measuring rolling radius with each rotation. It may be different and may also be different on cars with Idrive that have a more sophisticated system.

Could be wrong. Won't be the first or last

We agree on the system and how it works, mine is pre LCI so puncture warning for sure, I thought newer LCI cars had the sensors but maybe not :yu:

Yeah the newer ones have the TPMS systems, mentioned on True Blue’s new wheels, and I had to buy new ones for my new wheels for the E89. What I do remember reading is there’s a battery life for the sensors, 5 yr guarantee iiirc, so there’s an outside chance these may have/be failing because of age. I got genuine new BMW ones on eBay for £120. No idea how you’d check if this was the issue :roll:

 

[flybobbie]

My pre lci tyre monitor went off, pressure was 28 psi down from 38.

Of course you have to reset it after setting tyre pressures.

 

[enuff_zed]

If I understand correctly pre LCI cars like yours and mine have puncture warning systems rather than pressure warning. I believe this works using the wheel speed sensors rather than pressure sensor in the wheel itself. The flaw is slow reduction in pressure isn't captured. It works by calculating the difference in rotation and I think also the steering angle.

You can't rely on this sort of set up to detect a slow reduction in pressure, my guess is you've had the puncture longer than you think and you should keep an eye on your pressures like you should on a car without this kind of set up.

That's my understanding and open to be corrected

My LCI doesn't have sensors in the wheels.

My understanding was with all E89s it is a by-product of the ABS, by measuring rolling radius with each rotation. It may be different and may also be different on cars with Idrive that have a more sophisticated system.

Could be wrong. Won't be the first or last

Mine is a 64-plate, no IDrive, LCI. Has TPMS sensors.
I would double check yours. Just because there are standard valves fitted doesn't mean there should be.
Are you sure your system works?
A previous owner could have swapped wheels, or even fitted standard valves as there was a problem with the sensing system on the car?
Worth a double check any way.
Easy way to check would be to let a few psi out of one tyre and see if it tells you.

 

[Ole gits rule]

Post LCI and mine has gone off a few times, 26PSi and it goes off

 

[sars]

I got a low pressure notification yesterday, I could still drive but had to add air, three tyres had 2.0 bar and one at 2.2 bar. The new system on the M40i is pretty damn good giving both pressure and temperature

 

[Smartbear]

If I understand correctly pre LCI cars like yours and mine have puncture warning systems rather than pressure warning. I believe this works using the wheel speed sensors rather than pressure sensor in the wheel itself. The flaw is slow reduction in pressure isn't captured. It works by calculating the difference in rotation and I think also the steering angle.

You can't rely on this sort of set up to detect a slow reduction in pressure, my guess is you've had the puncture longer than you think and you should keep an eye on your pressures like you should on a car without this kind of set up.

That's my understanding and open to be corrected

My LCI doesn't have sensors in the wheels.

My understanding was with all E89s it is a by-product of the ABS, by measuring rolling radius with each rotation. It may be different and may also be different on cars with Idrive that have a more sophisticated system.

Could be wrong. Won't be the first or last

Mine is a 64-plate, no IDrive, LCI. Has TPMS sensors.
I would double check yours. Just because there are standard valves fitted doesn't mean there should be.
Are you sure your system works?
A previous owner could have swapped wheels, or even fitted standard valves as there was a problem with the sensing system on the car?
Worth a double check any way.
Easy way to check would be to let a few psi out of one tyre and see if it tells you.

My 63 plate (September) facelift car uses the abs rings, i think the change to internal wheel sensors happened sometime in 2014.
Rob

 

[Pondy]

Mine is a 64-plate, no IDrive, LCI. Has TPMS sensors.
I would double check yours. Just because there are standard valves fitted doesn't mean there should be.
Are you sure your system works?
A previous owner could have swapped wheels, or even fitted standard valves as there was a problem with the sensing system on the car?
Worth a double check any way.
Easy way to check would be to let a few psi out of one tyre and see if it tells you.

I have a 2013 LCI car but a 2012 owner's manual (don't ask!). In my owner's manual it gives details of both systems; FTMS (without wheel sensors) and TPMS (with sensors). So I'm presuming pre LCI were either available with TPMS as an option, or different spec for different markets.

 

[Smartbear]

Mine is a 64-plate, no IDrive, LCI. Has TPMS sensors.
I would double check yours. Just because there are standard valves fitted doesn't mean there should be.
Are you sure your system works?
A previous owner could have swapped wheels, or even fitted standard valves as there was a problem with the sensing system on the car?
Worth a double check any way.
Easy way to check would be to let a few psi out of one tyre and see if it tells you.

I have a 2013 LCI car but a 2012 owner's manual (don't ask!). In my owner's manual it gives details of both systems; FTMS (without wheel sensors) and TPMS (with sensors). So I'm presuming pre LCI were either available with TPMS as an option, or different spec for different markets.

What date was your car registered? :?
Rob

 

[mcbutler]

If you have the non TPMS system it needs to be reset every time you inflate/check your tyres.
This is done via iDrive if you have it, if you dont I have no idea how you would do that, maybe someone else knows?

 

[Pondy]

What date was your car registered? :?
Rob

Mine was registered April 2013, build date is March 2013.

 

[Pondy]

If you have the non TPMS system it needs to be reset every time you inflate/check your tyres.
This is done via iDrive if you have it, if you dont I have no idea how you would do that, maybe someone else knows?

A set of spanners and a big hammer usually does the trick :lol:

 

[Pondy]

My 63 plate (September) facelift car uses the abs rings, i think the change to internal wheel sensors happened sometime in 2014.
Rob

Sounds right, as my 2013 LCI does NOT have wheel sensors. I checked and it has manual reset. My 2008 E92, however, has wheel sensors so is TPMS :?

 

[B21]

I had puncture on the way to work yesterday and my tyre was completely flat, however, the TWPS didn't alarm out all I could hear is the noise and feel poor steering.

I had a puncture in the front wheel as well a few months back but the TWPS alarmed out instantly.

Is there anything I can do to make sure TWPS will work in case this happens again?

I've had 2 punctures in my Zeds..the first one in the front didn't warn until it was very very flat, the second one in the rear warned by the time it was 'squidgy'.

The abs sensor based ones I think are supposed to flag after about a 1/3 pressure has been lost.

However, because they are based on the relative motion of the 4 wheels having different diameter tyres from stock will 'throw' the calculations out a bit.

In the first case I had quite a difference in ratio sizes front and rear.

So as others have said, the system needs to be set when tyres are cold and correct pressures..then you have a fighting chance..but if you messa round with tyre sizes that will throw the logic a bit!

Of course the TPMS system fitted to later cars is far more sensitive aka better

 

[Nictrix]

If you have the non TPMS system it needs to be reset every time you inflate/check your tyres.
This is done via iDrive if you have it, if you dont I have no idea how you would do that, maybe someone else knows?

I thought you had to reset the system for TPMS as well after adjusting tyre pressures.
The tyre system can be reset through the stalks if the car doesnt have idrive.

 

[Nictrix]

My LCI doesn't have sensors in the wheels.

My understanding was with all E89s it is a by-product of the ABS, by measuring rolling radius with each rotation. It may be different and may also be different on cars with Idrive that have a more sophisticated system.

Could be wrong. Won't be the first or last

We agree on the system and how it works, mine is pre LCI so puncture warning for sure, I thought newer LCI cars had the sensors but maybe not :yu:

Yeah the newer ones have the TPMS systems, mentioned on True Blue’s new wheels, and I had to buy new ones for my new wheels for the E89. What I do remember reading is there’s a battery life for the sensors, 5 yr guarantee iiirc, so there’s an outside chance these may have/be failing because of age. I got genuine new BMW ones on eBay for £120. No idea how you’d check if this was the issue :roll:

If the car is supposed to have sensors in the wheels and they are not fitted there will be a warning alarm and a light on the dash every time you start the car.