Original BMW Rear PDC Ultrasonic Parking Sensor, Black, for BMW 5 Series, 7 Series, and X5 (1998–2002)

Parking distance control on the E38 7 Series, E39 5 Series, and E53 X5 relies on ultrasonic sensors like this Original BMW unit, which mounts behind the rear bumper and alerts the driver to obstacles while reversing. BMW names it the ultrasonic sensor, finished in black (schwarz), and production of this number began in November 1998. The sensor works as part of the PDC system, which many owners call parking aid or parking assist. It is priced and sold individually, so you replace only the sensor that has failed.

Original BMW Parts carry a 24-month parts warranty.

This number replaces the earlier sensor 66-21-8-375-533, and BMW marks the change as exchangeable retrospectively, so the newer part can go on cars built with the old one. A failing sensor usually shows itself in two ways: it stops responding when the car nears an obstacle, or the system beeps continuously with nothing nearby. Dirt, damage, or a wiring fault can all cause the constant warning.

Technical Details

• Manufacturer: BMW
• Part number: 66-21-6-902-182
• Replaces: 66-21-8-375-533, exchangeable retrospectively
• BMW part name: ultrasonic sensor
• Color: black
• Position: rear bumper
• Production from November 1998
• Priced and sold individually
• Warranty: 24 months on Original BMW Parts

Common Questions

Can I use this sensor if my car has the older part number?
Yes. BMW lists this number as a retrospective replacement for 66-21-8-375-533.

How do I know which sensor is bad?
A failed sensor either stops detecting obstacles or triggers continuous beeping with nothing nearby.

Is this sold as a set?
No. Each sensor is priced and sold individually.

Fitment & Compatibility

Use the fitment table below to confirm the exact year, make, model, submodel, and any application notes before ordering. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.