Wheels & tires
Tire-pressure sensor
Reports pressure from inside a wheel on direct-monitoring systems.
Attached to the valve or wheel inside the tire.
Battery-powered electronics transmit measurements to the monitoring system.
A tiny radio pressure gauge.
A missing reading can reflect the sensor, battery, compatibility or a reset procedure.
Inspect tread, age, pressure and damage rather than using appearance alone. Wheels and bearings are assessed for condition.
Inflation correction is small work; tire sets, forged wheels and damaged hubs can be much larger expenses.
Some BMW generations use indirect tire monitoring instead of pressure sensors in every wheel.
BMW models using the specified wheel and tire combination; approved sizes vary by vehicle.
Same system