The Jaguar XJ (X351) ran from 2010 to 2019. It is an older platform by current JLR standards but key replacement on it still requires JLR diagnostic software and specialist tooling. This is what the job involves on the XJ specifically.
XJ Key System
The X351 XJ used two different security architectures depending on year. Earlier models (2010 to approximately 2015) used a BCM-based immobiliser with SDD for key programming. Later models received updates that moved some of the key security functions toward the KVM arrangement used on the XE and XF. In practice, both require JLR SDD for key work. A standard auto locksmith with no JLR software cannot programme XJ keys.
XJ Key Types
The XJ used a proximity smart key with push-button start throughout the X351 production run. The fob design changed slightly across the production life. We confirm the exact key type at booking via VIN check.
What It Costs
| Service | AJ Auto Price | Main Dealer Estimate |
|---|---|---|
| Jaguar XJ spare key | From £180 | £400 to £900+ |
| Jaguar XJ all keys lost | From £250 | £700 to £1,500+ |
Spare Key vs All Keys Lost
A spare key job on the XJ requires the existing working key to be present and takes approximately 45 to 60 minutes. An all-keys-lost job involves clearing the security module and rebuilding it with new keys, takes 60 to 75 minutes, and requires proof of ownership. Both services are carried out at your location.
For the full Jaguar key service including all models, see the Jaguar key replacement page. For Jaguar all-keys-lost services specifically, see our Jaguar all keys lost page.
Frequently Asked Questions
Do all XJ models use the KVM?
Not all. The earlier XJ (X350, pre-2010) used BCM-based security. The X351 (2010 to 2019) moved to a KVM-adjacent architecture requiring SDD. We work on all XJ generations.
Is XJ key replacement more expensive due to the age of the vehicle?
Not significantly. The cost is in the tooling and the blank rather than the vehicle age. An XJ spare key starts from £180.
Can the XJ be left at a dealer for key work?
You could, but mobile attendance at your location is faster and equally competent. Most XJ owners prefer not to leave their vehicle at a dealer for several days.
Is the XJ key the same as the XF key?
The XF and XJ of the same era use similar KVM architecture and both require SDD or Pathfinder, but the key blank hardware differs by model year and variant. We confirm via VIN.
What We See in Practice
The XJ is an executive saloon with an ownership demographic that tends towards private buyers running the car well outside its warranty period. The key systems used across the XJ’s production span several generations, from the X350 and X358 through to the X351. We attend XJ callouts across the full production history and the most common situation is a car now ten or more years old, driven on a single key by an owner who has not needed to think about key replacement until something has started to go wrong. The XJ is a platform we know thoroughly and the programming process is well-established regardless of which generation is presented.
✅ 15+ years programming Jaguar, Land Rover and Range Rover keys
✅ Trusted by UK insurance companies, fully approved
✅ DBS checked, professional indemnity insured
✅ Same-day mobile service across England and Wales
✅ OEM-quality keys with 12-month warranty on all work
✅ 5-star rated on Google
JLR KEY SPECIALIST
Need a JLR key sorted today?
Same day Land Rover, Range Rover and Jaguar key replacement across London, England and South Wales. Trade accounts welcome.
When to go to a dealer instead
If your vehicle is still under JLR factory warranty and the fault is covered, take it to a dealer. Warranty repairs are free and no specialist can match that. If you need a recall fix, the dealer is the right call. Outside of those two situations, a mobile JLR specialist will be faster, cheaper, and will attend at your location.