#119
Jaguar XJS 1992 4.0 Serpi Star GM30 / XPI Alarm & Immobiliser System – Genuine Period Security Unit
Description
Original-period Serpi Star GM30 / XPI alarm and immobiliser system, removed from a 1992 Jaguar XJS 4.0.
The Serpi Star system is an aftermarket/period security installation commonly found on 1990s vehicles. It provides vehicle immobilisation and alarm functions, interrupting selected ignition/start circuits when armed. Jaguar XJS owners have documented similar period immobiliser installations on early-1990s cars, including systems that prevent starting when armed.
Key Features
* Serpi Star security system
* Model / Markings: GM30 / XPI
* Alarm and engine immobiliser functions
* Removed from a 1992 Jaguar XJS 4.0
* Period-correct 1990s security equipment
* Suitable for replacement, restoration or matching an existing Serpi Star installation
Fits / Application
* Jaguar XJS 4.0 – 1992 donor vehicle
* May suit other Jaguar XJS models fitted with the same Serpi Star GM30 / XPI security system
* Potentially suitable for other vehicles with an identical Serpi Star installation
This is not a standard Jaguar plug-and-play module across every XJS. Period alarm/immobiliser systems were often dealer or aftermarket fitted, so wiring and installation can differ between vehicles. Serpi Star/Gemel equipment and specialist programming support still exist for these older security systems.
Common Reasons for Replacement
* Immobiliser preventing engine start
* Alarm operating unexpectedly
* Faulty or intermittent security module
* Lost communication with remote/fob
* Damaged original security ECU
* Restoring an existing period Serpi Star installation
Condition
* Genuine used period component
* Removed from a Jaguar XJS
* Fully tested and in good working condition unless otherwise stated
* May show cosmetic marks and age-related wear
Identification
* Serpi Star
* GM30
* XPI
Please Note
Please compare the GM30 / XPI markings, plugs, wiring connections and photographs with your existing system before purchasing. Because this is an immobiliser/security component, it may need to be supplied with its matching fob, transponder, touch key or associated control components to work correctly in another vehicle. Specialist recoding services are available for some XJS immobiliser systems.