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I had a tyre failure with my 2007 X3 BMW 2.5 right rear. Drove about 30km with narrow spare, and then replaced both rear tyres with same size as in front but slight difference in height. lower at the back than front. Now I find a surge when gearbox change from 1st to second! What can the cause be? Could it be the tyre height difference?

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No. The tire height has nothing to do with it

Posted on Nov 25, 2013


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Turn the ignition on and attach your seat belt. Use the thumb wheel to scroll thru to the tire indicator. Press and hold the button at the end of the stalk(turn signal) for appx. 2 seconds and then release and then press and hold again. It will either have a box that comes up empty that will have a checkmark when the system is initialized or it will say "resetting". At the BMW national website for whatever country you are in you can go there and look at the complete manual and it will state for sure what your vehicle takes to reset.

Posted on Aug 29, 2010

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I have a 2007 X3 BMW 2.5 Automatic BMW and had a blown out tyre on the right rear, forcing me to drive about 30km on the narrow spare wheel. Then fitted 2 10% used tyres to rear, same size but slightly...

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.;

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