Since the purchase of our XJR last year the lower horn wasn't working which left a very weak high pitch horn. While this gets passed on annual inspection (USA-NC). It sounds weak and doesn't help in an emergency.

So, i purchased a used pair from a 2007 XJ. The install isn't bad, but takes some time to remove all the bolts and screws.

Fortunately, you only have to remove the forward splash shield, not the larger shield. 3 screws each side near front tires and then maybe 8 on the shield itself. All but 3 are star pattern while the others are normal bolts.

The horns are located on the left side near the curve of the front bumper. The bracket is difficult to reach so i removed each horn separately as its' only 1 bolt per horn. Very easy to remove and replace. Only one wire connector too.

Found the reason for the original horn to not function....something had worn a hole in the plactic and water leaked in which broke it. Unsure what is wearing the plastic, but i bent the bracket holding the lower horn to help from this reoccurring.

Here is a picture of the horns.