Every listing in this shop is a send-in postal service. Once ordered, we email you packing instructions and our workshop address — most jobs are completed and returned same-day on arrival, fully tracked.
Prefer we come to you or drop the vehicle in? Request a quote — mobile service is available across the West Midlands with a call-out fee based on your postcode.
Packing instructions and our workshop send-in address are emailed to you the moment your order is placed — always enclose a note with your order number, registration and phone number.
Read the full technical guideCall-out fees are guidance only — confirm your postcode when requesting mobile attendance. Postal send-in has no call-out fee.

| Make | Model | Year |
|---|---|---|
| BMW | BMW E46 316i / 318i / 320i (N42 / N46) | 2001–2006 |
| BMW | BMW E90 / E91 318i / 320i | 2005–2011 |
| BMW | BMW E81 / E87 116i / 118i / 120i | 2004–2011 |
| BMW | BMW E83 X3 2.0i | 2004–2010 |
| BMW | BMW E85 Z4 2.0i | 2005–2008 |
The donor still carries the previous car's immobiliser and adaptation data. We clear it back to a neutral state first, then write your original data across, so the unit behaves exactly like your own ECU rather than fighting the car.
Yes. Cloning writes your data into identical hardware — a different hardware number means different memory layout and processor, and it will not run. If the number you enter does not match, we contact you and refund in full rather than guess.
No. The clone carries your original immobiliser data, so it pairs with your existing CAS, FEM or BDC. Fit it, start the car, done.
Yes — add the remap option for £95 instead of £190, and tell us what you want in the requirements box. It is written to the cloned unit before it ships.
Send it anyway. As long as the memory chips are readable on the bench we can usually recover the data, even when the unit will not power up in the car. If it is genuinely unreadable we tell you and refund.
Same-day on arrival wherever possible, back in the post the same afternoon. Most customers have their unit back within 48 hours of posting.
Send your VIN and we'll confirm compatibility before you order. We cover CAS1, CAS2, CAS3, CAS3+, CAS4/CAS4+, FEM/BDC and BDC2.