What are the reasons for the Audi Q5 horn not working?
2 Answers
Audi Q5 horn not working reasons are introduced as follows: 1. Contact point erosion. Prolonged pressing of the horn can easily cause the horn contacts to erode, creating impedance, which weakens the current flowing through the electromagnetic coil, reduces the electromagnetic attraction, and prevents it from attracting the armature to drive the diaphragm to vibrate normally, resulting in a hoarse sound or even no sound. 2. Poor sealing leading to moisture. Although the interior of the horn is sealed, if the sealing is not tight, moisture can enter during car washing or water vapor can be present in the internal space, which can easily cause the contacts to become damp and fail to work properly. 3. Poor contact at the electromagnetic coil terminal. Some horns have aluminum metal rivet crimp connections for the enameled wire terminals of the internal electromagnetic coils, rather than secure welded connections. If the insulation paint on the enameled wire ends is not properly removed or the rivet crimping is not secure, it can easily lead to a loose connection fault, causing the horn to malfunction. This fault is due to the quality of the horn and cannot be repaired; only a new part can be replaced.
Last time I drove an Audi Q5, I also encountered a sudden horn failure. After struggling for a while, I found out it was due to oxidized pressure contacts inside the steering wheel. The design of this car is quite unique—the copper strips near the steering column tend to accumulate dust, leading to poor contact when honking. Additionally, it’s worth checking the small horn relay in the engine bay. Audi often hides it in a box near the battery, which can fail if water gets in during rainy weather. Remember to first inspect the F5 fuse for the steering wheel, located behind the small drawer on the driver’s side—I once tested it with a test light. If all else fails, the horn itself might be faulty. This car uses a snail horn, and replacing it requires removing the front bumper, which is a hassle. Finally, a reminder: driving on the highway without a horn is extremely dangerous, so address any issues promptly.
