Automotive Electronics
Lucas, Rover, MG, Nissan and Land Rover immobilizer solutions
Replacement modules, modifications and repair services for selected 5AS, 8AS, 10AS, 27VT, Pektron, ALM, CH12 and DH12 immobilizer systems.
Supported vehicles and systems
The service covers a range of British and related vehicles fitted with Lucas, Pektron and associated immobilizer systems.
Including selected vehicles with Honda PGMFi engines.
Including Micra and Serena applications.
Available solutions
Depending on the vehicle and immobilizer type, we provide a replacement module, a modification inside the original housing, or a repair and modification service.
For selected 5AS applications, the replacement module connects to the existing plug without soldering or searching for individual wires. The original configuration can be restored later if required.
Where central locking must remain available, the solution can be integrated into the original immobilizer housing. For 10AS units, the module is installed inside the original unit.
Because the required immobilizer code is vehicle-specific, the original immobilizer and available key fobs must normally be sent to us for reading and programming.
A lifetime warranty is provided for the proper function of our replacement module.
Examples of supported immobilizer units
Original images from our existing technical page showing typical 5AS, 10AS and ALM units.
Prices
Current price list, valid from 1 May 2026.
Prices include 19% German VAT and exclude shipping. EU business customers may provide a valid VAT ID for invoicing without German VAT where applicable.
Shipping: Germany €7; other EU countries €17 by tracked DHL Premium Parcel; destinations outside the EU upon request.
Sending your immobilizer
Please send the immobilizer together with all available key fobs to:
Ingenieurbüro Grafe
Ralf Grafe
Hammersteinstr. 3
47807 Krefeld
Germany
Reading the codes and producing the individual module is typically completed within one working day after receipt, provided no additional fault is found.
Important for customers outside the EU
Customs declaration and carrier recommendation
Based on our coordination with the local customs office, defective immobilizer units sent to us for repair should be declared as defective goods temporarily sent for repair and return.
For the CN22 customs declaration, we recommend stating a value of EUR 40 and clearly marking the parcel on the outside with: “Defective item, for repair and return only.”
Please do not use DHL Express. In our experience, DHL Express does not reliably process this type of temporary repair shipment under the intended customs procedure.
We recommend using UPS or FedEx instead. When using UPS or FedEx, please pay any customs fees in advance. Fees charged to us will otherwise be added to the invoice.
Customs requirements may vary by country and carrier. Customers should also follow the instructions of their local customs authority and complete all declarations accurately.
Where is the immobilizer located?
Classic Rover Mini: inside the vehicle behind the stereo.
Rover 25: to the left of the clutch pedal.
Rover 100: behind the glove box.
Older Rover 200 and 400: behind the instrument cluster.
Rover 214, 218 and 220: to the left of the clutch pedal.
Rover 414, 416 and 420: underneath the oddments compartment.
MG F: underneath the oddments compartment.
MG ZR: under the dashboard above the clutch pedal.
Lotus Elise: behind the instrument cluster.
Land Rover Freelander I: 27VT CCU on the rear of the fuse box.
Land Rover Discovery II: right-hand side of the passenger footwell.
Older Land Rover Defender: behind the instrument cluster.
Land Rover Defender Puma: behind the left loudspeaker beside the steering column.
Land Rover Discovery BCU: behind the glove box, secured by one screw.
Order or request advice
Use the form below and include the vehicle model, year, engine type, immobilizer type and whether central locking must remain functional.
The DHL shipping-label option in the form is available for shipments within Germany only and requires the sender’s full address.