Sadly i don't have any recommendations for you Marie, hopefully someone else will be along soon that might have a suggestion though.

Thank you again, Dave. That's a really good suggestion. Do you (or maybe anybody reading this post) know of an autoelectrician I could get in touch with in London? Most Jag specialists seem to be welded to their diagnostic equipment which (in my case at least) is just producing multiple 'options' - all seemingly quite different from each other. Marie

Sorry, it's the airbag warning light, some cars have "SRS" others have a pictogram of the steering wheel, a balloon and persons head. Just so you'll know, SRS stands for Safety Restraint System which we know as airbags. I can certainly understand you losing confidence, many moons ago i worked in a main dealers as an autoelectrician (it wasn't a Jag dealers) and we had a very similar fault to what you've described come in. My initial diagnosis was as i outlined yours might be above, a faulty/worn door latch so it wasn't operating the microswitch and consequently giving all kinds of false alarms. My boss had other ideas and insisted i used the manufacturers computer to interrogate the system. Many wasted visits including a new door loom later plus other miscellaneous parts, it still wasn't fixed so i convinced my boss to let me have a look and sure enough, worn latch so the microswitch telling the system the door was open was worn. One new latch later, no more problems. As you might guess, the customer had lost all confidence until i forgot about using the computer and did it the old fashioned way. It might be worth your while finding a local autoelectrician or perhaps a Jag specilist who has an autoelectrician they use (or better still, know of the most likely cause of this fault) and having it investigated.

Thank you so much for replying, Dave. It was a Jag garage who diagnosed it (that was their fourth diagnosis - after battery, BCM and rear sensor - so I rather lost confidence). What is the SRS warning light? Is that something I can ignore if I unplug the front impact sensor?

Let's hope not John! 👍🏻

Welcome aboard Marie, first thing to check is the diagnosis is correct - who actually told you the front impact sensor and security sounder were faulty? To me, it sounds more like a worn latch (NOT lock) in one of the doors not moving the microswitch sufficiently to give a "door closed" signal to the security/alarm ECU. Usually the security sounder either works or it doesn't, it shouldn't really have an effect on the system. Also it might be worth unplugging the front impact sensor, i'm not overly familiar with the Jag system but most systems will ignore an unplugged sensor. Please be aware this might cause the SRS warning light to come on as i believe the impact sensor is shared between the two systems.

My central locking causes the alarm to go off after the car has been locked - a few minutes later. I have been told that the fault is in the front impact sensor and the security sounder - both of which need replacing. Possibly related, the pedestrian sensors work intermittantly. Does anybody else have experience of these faults/suggested solution? The quoted price for replacement is around £1200 so I don't want to go ahead unless I am reasonably happy that these replacements will solve the issue(s) and that the price feels right. I would be so grateful for any advice.