Jaguar Keyless System Failure Points to Antenna Issues

I faced nearly identical issues with my 2005 Jaguar XJ last year. The symptoms match exactly what you describe, intermittent central locking and remote start failures. The car radio and keyless system share parts of the automotive antenna network, and in my case, the problem was indeed a damaged antenna connection. The workshop found corroded wiring at the fm antenna mount point, which affected the entire keyless system. The repair involved: testing the antenna system components, Replacing damaged connection cables, Recalibrating the keyless entry system Total cost was 95€ for parts and labor, and the system has worked flawlessly since. To provide more specific guidance, could you share: Have you noticed any radio reception issues? Are there visible damages to any external antenna components? Does the problem get worse in wet weather? Which specific error codes are showing up? This information would help determine if your issue matches mine and whether you might need similar repairs.

Thanks for sharing your experience. My Jaguar XK just had its service last month at 109554 KM. Interestingly, I have noticed poor radio reception lately, especially for FM stations. The signal interference seems worse when its raining. No visible damage to the antenna mount that I can spot, but I will get it checked. The error codes are B1342 and B1343, both pointing to antenna circuit issues. Think I will book it in for diagnosis to check if the antenna repair needed is similar to your case since the symptoms match up pretty closely.

Yes, those symptoms definitely align with what I experienced. The poor FM reception combined with keyless system issues is a classic sign of automotive antenna problems in these Jaguars. When I had my XJ repaired, the technician mentioned that moisture intrusion at the antenna base is particularly common in these models. The error codes you mention are the same ones I had. B1342 and B1343 specifically relate to the vehicle antenna circuit, which affects both the car radio reception and the keyless entry system. The rain making it worse further confirms this, water getting into corroded antenna connections typically causes intermittent failures. Since your car antenna was not addressed during the recent service, and given the identical symptoms to my case, I strongly suspect youll need similar repairs. The fix is straightforward when you know what to look for. On my car, they found the corrosion at the base of the antenna mount where the wiring enters the body. The antenna replacement was relatively quick, though getting to some of the connections required removing interior trim panels. Watch out for shops quoting excessive prices, the parts themselves are not particularly expensive. My 95€ repair has held up perfectly for over a year now.

Thanks for the insights. After comparing my situation with similar experiences, I'm now quite confident the antenna system is the source of my problems. The matching error codes B1342 and B1343, combined with the FM radio issues and weather-related symptoms, point clearly to an antenna circuit problem. I've scheduled an appointment at a local specialist next week. Will make sure they check the antenna mount and connections for corrosion, especially given how the problems worsen in wet weather. The quoted repair cost of around 100€ seems reasonable based on the feedback here. Really appreciate the detailed explanation about how the vehicle antenna system affects both the radio and keyless functions. Will update once the repair is done, but feeling much better about tackling this issue now that I understand what's likely wrong.