Seems that the back of my undertray has fallen off and is dragging on the ground. Of course, I found out as I was about to pull out and go for a nice evening drive and heard a horrific crunching/dragging noise. Has this happened to anyone else?

I imagine the nylon nuts attaching the undertray to the chassis/frame have worn out. Any idea what the part number might be for this? I'm going to head to the dealer tomorrow to try to get some replacements. After I verify that this is the problem!

 

Bummers...good time to paint it gloss black while you have it off. Just thinking of doing that to mine.

 

The use of tie wraps is another temporary measure that will work.....

I've seen this method used quite successfully several times as a get you going measure, that some have left in place for much longer

 

Why would you paint it? It's under the engine!

 

Thanks, I might use a zip tie or a toggle bolt if I can't find the right part. God knows that if I use one of those, I will probably never get around to doing the proper repair...

 

Alan,
My 2007 XK had similar problem except only one nut fell off; they are just 10mm nuts, I used steel with a lock washer...........no need for OEM part. Noticed when crawling around underneath. Having had Jags for over 50 years have learned to look underneath periodically !


Cheers, Adrian









Cheers, Adrian

 

Do you mean these?

 

Yes, that's exactly where it's dangling!

 

Fixed for $5! The back of the undertray is secured by 2 M6 metric (10mm head) nuts. I also used a 1.5" fender washer to secure the tray, and put two nuts on each stud for extra security. Purchased the generic pieces from a local auto parts store.

The last people to work on the car were my local Jaguar dealership a few weeks ago. I took it there for an oil change specifically so I could avoid these sorts of shenanigans. Why even bother going to the dealer if they're not going to do the job right?

 

Good question. Have you ever found a dealer that does?

 

So sorry. Was thinking of the small piece of grayish plastic on the bottom of the rear bumper.
Are you going to call the dealership who changed your oil?

 

I guessed from the MY that you have the early pattern Undertray. Here are the relevant Part Numbers:


(click on the image to enlarge it)

I can't see any way to use the zip tie method on this pattern Undertray without putting additional holes through it.

Graham

 

I might send them a note. I'm just glad it's something I fixed easily myself.

When I first heard the noise, I thought the worst. Oh geez! The front brake calipers have fallen off! Or the wheel bearings are toast!

 

Have yet to crawl under my Jag, guess I should.

 

You are confusing dealer accreditation with competence. The junior techs given the simple jobs like oil changes may be no more skilled/experienced than the guys at the local grease emporium - possibly less. Which is why my car is booked in to my favourite independent for its next service.