At last I now have three keys. It was handed over with just one and the others have not been found. I had to order 2 new keys from MMC via the dealer (key part no MDE1986, transponder chip part no MDE1987) and have the keys cut by a local specialist who also recoded the ECU and keys at a reasonable cost of £50. Finding the diagnostic port was the hardest part - well hidden up under the glovebox FWIW. The dealer is going to reimburse the cost. So it is not correct that a lost master key requires a new ECU. If anyone else finds themself in this situation, I now know what needs to be done and have kept details. It is a Ford ECU/immobiiser system, yet the key itself is a Freelander key - adapted to take a Texas 4D transponder - and is unique to MMC (surprise surprise) so you can't just order one from an aftermarket supplier.
Morning Nigel,
Sounds like you're enjoying the car, which is great!
The above info is very interesting as you won't be the first person, or the last, who needs to replace 1 (or more) keys. The cost you've mentioned are very reasonable when you compare what BMW charged when I had to change all locks on a new model car!
