Vehicle electronics & repair service
Immobilisers for Rover, MG and Land Rover
We provide vehicle-specific solutions for Lucas 5AS, Lucas 10AS, ALM, Pektron immobilisers, the Discovery II BCU and the Freelander 27VT immobiliser. Depending on the system, replacement modules, modifications or repairs may be possible.
Video: How the system works and typical faults
This video explains in general how a Lucas 5AS, 10AS or ALM immobiliser works, how it communicates with the engine control unit and which typical problems can occur.
Alternatively, open the video directly on YouTube.
Plug and play
For suitable 5AS applications, a replacement module can be connected without modifying the vehicle wiring loom.
Retain original functions
Depending on the system, the solution can be integrated into the original housing so that central locking and alarm functions remain available.
Individually adapted
Existing vehicle data is read and processed to suit the relevant control unit.
Systems covered
- Lucas 5AS
- Lucas 10AS
- Land Rover ALM
- Pektron immobilisers
- Land Rover Discovery II BCU
- Land Rover Freelander 27VT
- Selected Rover and MG systems
- Other suitable applications after inspection
Supported vehicles
- Classic Mini with SPI or MPI injection
- MG F, MG TF, MG ZR and related models
- Rover 100, 200, 400, 600 and 800
- Selected Rover models with Honda PGM-Fi engine management
- Lotus Elise with Rover engine
- Land Rover Defender, Discovery and Freelander
- Morgan and Caterham with Rover engine
- Other vehicles after inspection of the electronics
Which solution is possible?
Depending on the vehicle, engine management and immobiliser type, we may provide a separate replacement module, a modification inside the original housing or a repair of the existing unit.
For selected 5AS systems, the module can be connected directly to the original plug. For 10AS, ALM, Pektron, BCU and 27VT applications, the appropriate solution depends on the exact fault and the functions that must be retained.
Examples of supported systems
Where is the immobiliser located?
The location depends on the vehicle model and the system fitted. The following positions are intended as practical guidance:
| Vehicle | Typical location |
|---|---|
| Classic Rover Mini | Inside the cabin behind the radio, mounted to the bulkhead |
| Rover 25 | High on the left-hand side near the clutch pedal |
| Rover 100 | Behind the glove box |
| Earlier Rover 200/400 | Behind the instrument cluster |
| Rover 214/218/220 | High on the left-hand side near the clutch pedal |
| Rover 414/416/420 | Under the centre console |
| MG F | Inside the centre console; remove the footwell trim |
| MG ZR | Under the dashboard above the clutch pedal |
| Lotus Elise | Behind the instrument cluster or STACK; open removal instructions |
| Land Rover Freelander I, 27VT | On the rear of the fuse box |
| Land Rover Discovery | Right-hand side of the passenger footwell |
| Earlier Land Rover Defender | Behind the instrument panel |
| Land Rover Defender Puma | Behind the left-hand speaker next to the steering column |
| Land Rover Discovery II BCU | Behind the glove box, secured by one screw |
Equipment level, model year and left- or right-hand drive may affect the exact position. Disconnect the vehicle battery in accordance with the manufacturer’s instructions before removal.
Ordering and processing
- Complete the form: Provide the vehicle model, model year, engine, immobiliser type and required functions.
- Wait for our reply: We check which solution is suitable and confirm the price, shipping and parts required.
- Locate and remove the unit: Use the location table as a guide. Contact us first when uncertain.
- Send the unit: Pack the relevant control unit securely together with all required or still available remote key fobs.
- Processing: We read the data and carry out the agreed modification, repair or individual solution.
- Payment and return shipping: Giropay or bank transfer are preferred. PayPal is also accepted, but it incurs additional fees. The unit is returned after payment has been received.
A standard order is typically processed within approximately one working day after arrival, provided that no additional fault is found.
Current prices are listed on the immobiliser services and prices page.
Shipping address
Please only send units after prior confirmation:
Ingenieurbüro Grafe
Ralf Grafe
Hammersteinstr. 3
47807 Krefeld
Germany
Shipments from outside the EU
Repair shipments from non-EU countries may result in import duties and handling charges. Declare the shipment correctly as a defective item sent for repair and return, and follow the requirements of the relevant customs authority and carrier.
Please use tracked shipping. Customs declarations must be complete and truthful.
Request or order an immobiliser solution
Please use only the following form for enquiries and orders. Include the vehicle model, model year, engine, immobiliser type and whether central locking or alarm functions must remain available.
Please do not send control units without contacting us first.