Help! The center windscreen wiper keeps coming loose at its base on my new 2025 Plus Four. Can anyone enlighten me as to the "workings" underneath? Is there a nut that I can't see that has vibrated loose? I tighten the outer nut but after a few trips in the rain, it loosens again and the entire outer mechanism dances around on the bonnet. Its threaded "tube" protrudes much further (higher, more threads exposed) than the other two wipers. Isn't this bending the wipers' connecting bar by drawing it upward more than the other two wipers? The dealer thinks that the dashboard has to be removed to diagnose and fix the ongoing problem. I'll reserve that as my absolute last employed action. I'd appreciate advice or even a parts book illustration so I might better understand what's going on and "creatively" tighten it properly from the exterior. I have an idea that might work but I need to comprehend what's going on underneath before implementing my idea. Thanks guys!
Good afternoon Moggin, ok we have been where you are now. I have a 2020 Plus Six, it has had 3 sets of wiper linkage.
If the problem is the trunnion drive coming loose ( the bit that sticks up and the wiper blade attach to it ) then you have to drop the dash to access the interior wiper mechanism. As you car is 2025 it should still be under warranty. Having had major issues with the wipers I strongly suggest you do not work on them if the vehicle still has warranty. The internal mechanism is very adjustable plus the trunnion drives to the wipers should more or less be at the same height, their securing nuts location should be similar within a thread or two.
If the vehicle still has warranty I would contact John Bower at the factory, he is the aftersales manager and responsible for warranty claims.
dave
