M-code · 911 997.1
M521
Tilt (towing) sensor for alarm
On the Porsche 911 997.1 (2005-2008), option code M521 means: Tilt (towing) sensor for alarm.
- Code
- M521 · also 521
- Category
- Security
- Type
- M-code
- Model
- 911 997.1
- Years
- 2005-2008
- Confidence
- Medium confidence
01Explained
About M-code codes
M-codes (“Mehrausstattung”) are the classic Porsche factory option numbers printed on the build sheet, window sticker and the option sticker in the service book or front trunk. On a 997.1 you will usually find M521 on the option sticker in the service/maintenance booklet, the front-trunk data label, or the original window sticker (Monroney label in the US).
02Confidence
“medium”: one solid public source; plausible but not double-checked. Option meanings can differ between markets and model years.
M521 on other generations
03Related
More security codes on the 997.1
All 997.1 codes →- M524Immobiliser/central locking, 433 MHzM-code
- M525Immobiliser/central locking, 315 MHzM-code
- M532No alarmM-code
- M534Alarm system, 433 MHzM-code
- M535Alarm system, 315 MHzM-code
- M536Alarm sirenM-code
- M544Anti-theft system without interior infrared monitoringM-code
- M545Anti-theft system without interior infrared monitoringM-code
Verified against kindel.com. Description is our own wording.
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