These instructions apply to the Alpina B5 / D5 (G30/G31) 2017-2024.
For other models, please choose your vehicle here.
If the tyre-pressure warning has come on in your Alpina B5 / D5 (G30/G31, 2017–2024) after you’ve adjusted the pressures or changed a wheel, you reset it from the iDrive menu and a short drive. The warning at this point is normal — the car is asking you to confirm the pressures as the new reference — and it is not, by itself, a sign of a fault. Here’s how to reset it and what to check if it won’t clear.
How It Works on the B5 / D5
The B5 and D5 monitor the pressure at each wheel and warn when a corner drops meaningfully below the stored reference. Rather than relearning automatically the instant you inflate a tyre, the system holds its last confirmed figures until you set a new baseline through iDrive. When you select Reset, the car takes the current pressures as the target and monitors against them once you drive — so the tyres need to be correct before you confirm. A cold morning, a slow leak, or a garage setting a different figure are the usual reasons it lights up.
When to Reset
- After checking or adjusting the tyre pressures.
- After changing one or more wheels or tyres.
Before You Start
- Set the pressures cold — before driving, or after the car has stood a few hours — so warm-up expansion doesn’t skew the stored figures.
- Use the door-pillar label values, and match the load/speed column if you’re running loaded or at sustained high speed.
- Check the spare if it carries a sensor.
- Only run the Reset once all four are set correctly — the car saves whatever it reads at that moment.
Resetting the System
- Set all four tyres to the correct cold pressures.
- Using the iDrive controller, go to ‘My Vehicle’ > ‘Vehicle status’ > ‘Tyre pressure monitoring’.
- Turn the ignition on and select ‘Reset’ from the menu.
- Drive the vehicle at over 30 km/h (18 mph) to complete the procedure.
If the Warning Stays On
- Recheck every tyre — one below spec keeps the warning on even after a reset.
- Complete the drive so the system can confirm the pressures; a very short hop may not be enough.
- Re-run the reset after any wheel swap — winter wheels or a fresh set leave the old baseline out of step.
- A cold overnight can drop every tyre a couple of psi — top up to the label figure and reset again.
- A tyre that keeps going down is a slow puncture, not a menu issue — inspect the tread and valve.
- Still showing with correct pressures? A sensor may have a flat battery — look up the code on autodtcs.com.
What to Expect After
With the pressures set and the confirming drive done, the warning clears and the car monitors against the new reference. It should only return if a tyre genuinely loses pressure or the temperature drops sharply. If the warning comes back within a day or two despite correct, stable pressures, treat that as a real leak worth chasing rather than repeating the reset.
Frequently Asked Questions
How do I reset the tyre pressure light on an Alpina B5/D5?
Set the pressures, then iDrive > My Vehicle > Vehicle status > Tyre pressure monitoring > Reset, and drive above 30 km/h. The car takes the current pressures as its new reference during that drive and clears the warning. Make sure all four are correct and cold before you press Reset, since it stores whatever it reads.
Why won’t the warning clear?
Usually a tyre still below spec, or the confirming drive wasn’t completed. Recheck every corner with a gauge, top up any that are low, run the Reset again, then drive above 30 km/h for a few minutes. A tyre that keeps dropping points to a slow puncture that needs inspecting rather than another reset.
Do I need a tool?
No for a normal reset; a tool is only needed if a pressure sensor is replaced.
Does adjusting one tyre need a full reset?
Set all four correctly first, then run the iDrive reset so the baseline is right. The system re-references every corner together when you confirm, so even a single top-up is best followed by checking the other three and then running Reset, rather than assuming the one tyre will clear the warning on its own.
Why does it warn in cold weather?
Air contracts as it cools, so a cold morning can pull every tyre down a few psi and trip the warning with no leak present. Re-inflate to the door-pillar figure while the tyres are cold, run the reset, and drive above 30 km/h; it should stay off once the pressures are back in range.
I fitted winter wheels — do I reset again?
Yes. A different set of wheels or tyres carries its own pressures and the old stored reference no longer matches, so run the iDrive reset after fitting them and set the pressures to the label figure first. Repeat the same step when you switch back to the summer set.
If the warning came on with other lights, decode the code on autodtcs.com.
Independent guide — not affiliated with Alpina. Always follow your official service manual and safety precautions. Read our full disclaimer.