Option code M521 · Safety & Security
Tilt (towing) sensor for alarm
Documented on
- Panamera (970)
- Boxster/Cayman (981)
- 718 Boxster/Cayman (982)
- Boxster/Cayman (987.1)
- Boxster/Cayman (987.2)
- 911 (991.1)
- 911 (991.2)
- 911 (997.1)
- 911 (997.2)
How to confirm it on a real car
Porsche records factory equipment in the service booklet and usually under the front lid. Stickers go missing and cars get modified, so the ground truth for any specific VIN is the factory build record: every option code the car was born with, including M521 if it was ordered.
Was M521 on your car's original build?
The CarWhere build sheet decodes any Porsche VIN into its full factory record — every option code, the original paint, trim and equipment, as built. $9.99, instant.
More safety & security codes
Independent reference; not affiliated with Porsche. Applicability varies by market and model year.