PEPS vs UWB Smart Keys on Jaguars — What the Difference Means for Owners
Jaguar smart keys come in two main architectures on current and recent models: PEPS (Passive Entry Passive Start) and UWB (Ultra-Wideband). Both give you keyless entry and push-button start. The difference is in how precisely the vehicle knows where the key is, which has practical implications for both security and everyday use. How PEPS Works […]
UWB Keys on the Jaguar — What They Are and Whether Upgrading Is Worth It
Ultra-Wideband (UWB) key technology has been introduced across the JLR range on newer platforms. If you own an older Jaguar or are considering a newer model, here is a plain explanation of what UWB actually changes. PEPS vs UWB: The Practical Difference Standard PEPS (Passive Entry Passive Start) uses 125 kHz low-frequency antenna fields around […]
Protecting Your Jaguar Against Relay Theft in 2026 — What Actually Works
Jaguar models with passive entry are targeted by relay attack theft in the same way as Range Rovers and Land Rovers. The F-PACE and I-PACE in particular appear in UK vehicle theft data at a higher rate than many comparable vehicles. This is what actually reduces the risk. Why Jaguars Are Targeted A combination of […]
What Is the Jaguar KVM and Why Does It Matter When Programming Keys?
The KVM (Key Vehicle Module) is mentioned in most conversations about Jaguar key replacement, but very few explanations go beyond naming it. Understanding what it actually does helps explain why Jaguar key programming cannot be done with standard automotive tools and why the process differs from older vehicles. What the KVM Is The KVM is […]
Jaguar I-PACE Over-the-Air Update Caused Key Problems — What to Check First
A small but consistent number of Jaguar I-PACE owners contact us following an over-the-air software update with key recognition issues that were not present before the update. This is a specific pattern worth understanding if your I-PACE has recently updated and is now showing key warnings. What OTA Updates Do on the I-PACE The Jaguar […]
Jaguar F-PACE Pre and Post-2020 Facelift — Why the Keys and Programming Process Are Different
The Jaguar F-PACE received a significant mid-cycle facelift for the 2021 model year. Most of the changes were to the exterior styling, interior materials, and infotainment system. Less discussed is the fact that the key fob design also changed, and with it the programming parameters in Pathfinder. For anyone doing F-PACE key work, this distinction […]
Why the Jaguar I-PACE 12V Battery Causes Key Faults Even When the EV Battery Is Full
One of the most confusing calls we receive is from an I-PACE owner whose key has stopped working despite the car showing a healthy traction battery charge. The explanation comes down to how the I-PACE distributes power between its two battery systems, and understanding it prevents a lot of unnecessary confusion and expense. The I-PACE […]
Jaguar Key Programming in Watford and Hertfordshire — Same-Day Mobile Service
AJ Auto provides same-day Jaguar key replacement across Watford, Hertfordshire, and the surrounding areas. Whether you need a spare key, a replacement fob, or a full all-keys-lost recovery, we attend at your location and complete the job on site. Jaguar Key Services in Watford and Hertfordshire We cover the whole of Hertfordshire including Watford, St […]
Jaguar F-Type Key Replacement in the UK — Costs and What to Expect
The Jaguar F-Type X152 launched in 2013 as the first Jaguar to use the new KVM-based security architecture across the full model range. Key replacement on the F-Type is a specialist job and the same process applies whether you have a convertible or coupe. This covers what the job involves and what it costs. F-Type […]
Jaguar XJ Key Replacement — Older Platform, Still a Specialist Job
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. […]