Bmw Technical Help

Are these the original tires? I had the same problem with a BMW years ago with my first set of replacement tires. Turned out the wheels were porous, and the air was leaking through the wheels. We needed to put tubes in the tires. If all 4 are going down at the same rate, that may be it.

Depending on the manufacturer and type of tire, the tire pressure spec's will be different, The labeling imprinted on the sidewall of the tire will specify the recommended tire pressure. Most average tire pressures used for highway tires is 32 P.S.I.

This is usually caused when one tire is several pound lower that the others but not flat, especially if you system includes the spare tire which is easy to forget to check.

Yes

32psi

from the rear tyre. there is a little adjuster
you will need to remove one tyre bold the with a light look through as turning the tyre. you will see the adjuster

For legal reasons the tyres on your vehicle must be of all the same profile . That is for example if you have 195- 75 15 on the car you must have all 195-75 15 on the car. You cannot have 195-75 15 on the front and 195-45 15 on the rear. IT is not just a bit smaller it lowers that rear of the car by 30mm. However it may cause the problem but I would expect it to happen in all gears . I suspect that the engine RPM's ares hanging on a bit and not reducing sufficiently for when the clutch is again for second gear. There is a large ratio change from 1 to 2 and less so for the remainder. Run fault codes to check for idle sensor/ accelerator position problem sensor.;

Watch out for a vehicle thats had a 2 inch or greater upgrade in tyres. These things chew up the inner sides of the rear tyres pretty savagely, the standard tyres (eg a 235/65/17 for a base model) relies on having sidewall flex and low(ish) tyre pressures to spread the weight and wear on the rears. Lower profile and or higher pressure will chew out rear tyres.
Also look out for the drivers door handle, its called the 'carrier' its weak and wears out, a genuine BMW carrier fitted in a BMW workshop can cost you over $600 all up. You can get OEM parts for $100 on Ebay, From the same factory and packed in same box and then make whoever is fitting it quote you on hours and dollars before they start. You drive away under $250 AuD
Keep up the oil changes, air and fuel filters and you will have a vehicle to be proud of, Fantastic motoring, Enjoy.

This will only come on when a tyre has dropped in pressure (not spare). It work on the principle that a tyre with less air has a smaller rolling circumference and therefore a different wheel speed. This is then monitored against other signals from other wheels and determined that a loss in pressure has occured.

If all tyre pressures seem ok, there could be a chance of a small unoticeable leak and would require a bath test. This is when the tyre is dipped in water and bubbles would appear where the puncture is.

Ultimately the system may just need to be reset, or has incorrectly been reset from a tyre change. For this you just press and hold the TPC button (located on the centre console above the gearstick - looks like a flat tyre with an exclamation) turn on the ignition to position 2 and the light will come on re then yellow,go out, come back on yellow. When it comes back on yellow it re-initializing the system. You can let go of the button and after 20 odd seconds the light will go out for the final time, completing the reset.

If the light continues to come on after the reset then you definitely have a puncture somewhere!

Hope this helps!

THE LIGHTS COMES ON WHEN ONE OR TWO WHEELS STARTS SPINING (WHEN TERES NO TRACTION) ITS STOPS THE CAR FROM SPINING SO ITSTOPS POWER GOING TO THAT WHEEL.

MAKE SURE YOR TYRES ARE INFLATED RIGHT OR YOUR TYRES ARE WEARING OUT