I folded a small piece of paper and placed it between the windshield and dash years ago to fix that same issue Still works! While driving have someone reach up and put pressure on areas of the dash near the windshield to see if the noise stops to find the area

 

Also the defrost vents can come loose & rattle.

 

Years ago I was a service Mgr. for an Oldsmobile dealership. We had a Cutlass with a terrible creak in the dash by the windshield while crossing railroad tracks. After trying everything to insulate the dash with no results, I asked the mechanic to pop the hood release while driving very slowly over the railroad tracks. The noise quit! It was the rubber bumpers at the rear of the hood that were squeaking! We put a dab of lithium grease on all the hood bumpers. Car never came back for that squeak. If your 2003 hood opens at the rear no problem, if it opens from the front, it will catch on the secondary latch.

 

 

Had a terrible squeek in my XKR conv. Turned out to be outer windshield mldg. rubbing against glass. Inserted small piece of rubber tape in offending areas. A maddening problem solved. I had made a 1100mi trip with it.

 

.

I had a squeak from the instrument panel area, turned out it was just the burl wood instrument surround, By pressing on it the squeak would stop, so I cut and inserted one of those soft cupboard door pads under it, and.....silence. So much silence that I could now hear an occasional squeak from the dash in front of the passenger seat, turned out this was the glove box, which has adjustable latches, a quick adjustment and............. hey presto, cured!

.

 

 

Well my defrost vent grille gave up the ghost & fractured, anyone know where I could preferably locate a new one ?! Even the used ones appear scarce & only partials @ that.

 

 

KC, is it parts 4 & 5 that you are referring to?
https://www.jaguarmerriamparts.com/p...iagram=4721255

 

Yes #4's in pieces but my logic is to replace all @ once, thanks for the link.

 

Looks like those items are no longer available from Jaguar.

I did find the part #s though......
Left section= GNC6601ACLEG
Center section= GNC6616ACLEG
Right section= GNC6600ACLEG

I did find this link for a used left-hand one.........in the UK
https://www.autoreservejaguar.com/ja...coal-left.html


.

 

A 3D printer & the proper colored material would prove useful w/ these cars (pontificates) lol.

 

Yep, I hear those 3D printers are getting cheaper by the minute.......but maybe not quite into our economic price range yet!


.

 

I've found #4 on eBay but it's missing a tab & dirty, sure I can clean it but w/ the missing tab I'm not sure it would remedy the noise issue that lead to this in the 1st place.

Update :

Went ahead & removed the fractured part of the grille, it made it much quieter instantly. I pinpointed the remaining creak to where the dash meets the windshield, I inserted about a 3 inch long piece of corrugated cardboard into the space between dash & windshield. It's almost silent, a vast improvement ! I initially tried white paper folded up, but the stark white on my tan dash drew my eye the wrong way. Now it's just how long it will take my missing the left hand part of grille to irk me lol.

 

I have replaced left & middle I still need the right GNC6600ACLEG if anyone can assist lol.

These pieces crumble like dominoes when you remove/install a new piece, go figure ?!

 

PSA

I found my rare vent w/ the below e-Bay listing just message him & ask, then he will find & list it for you !

https://www.ebay.com/itm/123621147024

Username : molee1981

 

Finally got mine completely replaced, it's so quiet now lol.

Here's a complete set if anyone's looking.

https://www.ebay.com/itm/1998-1999-2...A/143109817424

 

My defroster plastic just below the windshield does not fasten down all the way, will creak when it's cold. Unsure how to access to fix it.