Chrisdut:
not sure you can code a second hand key to a mk5
mk4 yes
but when you order a mk5 from parts it comes part coded already and then its matched to the car
anyone managed to code a second hand key to a mk5?
Yes s/h remotes can be coded for a MK5. (I have done one for our MK5):
1. Open the current key you have.
2. Buy a replacement (used) key from eBay (etc) that has the same part No. and frequency (MHZ) as your current key.
3. Buy a new TP23 transponder and blank key blade from Hickleys.com
4. Get the new key cut at a local locksmith who has a LASER cutter
5. Find someone with VAG commander and get them to retrieve your SKC (secret key code) so the new transponder can be programmed.
6. Get someone with VCDS to program the remote and new immobilizer. (eBay cables do not work on the MK5 on wards so you need a genuine Ross-Tech cable)
Total cost (including paying for the services of people with VAG commander and VCDS) should come in at less than £50 - I paid a total of £30, but i have my own VCDS cable.
old_no7's thread will walk you through the process (although this was done on a MK4, it is essentially the same for a MK5, BUT they use a different transponder)
Skoda Superb Comfort 1.9TDi (130)
Golf MKV SE 1.9 TDi (105)
VCDS owner (genuine interface - covers all VAG cars)