What do I do about a thudding noise that comes from the middle undercarriage?

SOURCE: Roaring Noise

check the mounts for the shock absorbers

SOURCE: 2001 A4 Quattro Back Seat Passenger Side Door

There is a child lock on it. Open the door and look on the edge of the door, where it mates to the body when the door closes. There's a lever there that is labeled as the child lock. It'll show her which way to switch the lever to allow the door to be opened from inside the car.

SOURCE: groaning noise on my peugeot 306 passenger door/ cl unlock n locking thing

open the door pull the rubber boot back that houses the wiring loom you will find that there are a number of wires broken if doable solder them back to gether and insulation tap them up, you should find this solves your problem.
your noise should and your windows should work if there are to many wires brocken you can get a new loom from the dealer

good luck

this is a very common problem i do 2 ore 3 of these a day

SOURCE: Front passenger door lock wont work, seat belt light on

Sounds like the plastic clip that connects the lock has broken however regardless of fault the inner door panel has to be removed to diagnose and repair.It could also be inner door lock assembly.

Harvey N Tawatao

• 3854 Answers
• Posted on Aug 21, 2009

SOURCE: Thud Thud Thud noise from centre rear back

Your Caravan has no rear differential. The van is a front wheel drive, you may have a bad brake or your spare tire under the back of the van is lose. the other thing to look for in the back is the rear shocks could be broken or lose. Good luck and keep me posted, be glad to help get your van running 100% again soon. 

Testimonial: "Yes, you are correct that front wheel drives have no rear differential. Man, I feel stupid! Thanks though as that eliminates that as a source. "