2021 Volkswagen Tiguan electrical system problems

“2021 Tiguan parking brake comes on without being commanded. There is a fault with the drivers door. I believe the the driver door module or corresponding wiring. The front drivers window toggle switch does not work the toggles switches for the rest of the window work only if the is not an error displayed on the dash. The lock button does not work on the drivers door at all and only works on the rest of the door when an error message is not displayed on the dash. The dash displays the following errors: 1. Driver Door Contact Switch. 2. Start/Stop. 3. Electronic Parking Brake. It also displays Attention: Engine is running. So far the parking brake only comes on(un commanded) when the vehicle is stopped.”

“The J949 SOS emergency communication unit failed, disabling vehicle 911 automatic crash notifications and emergency response capabilities.” NHTSA opens defect investigations based on consumer complaint clusters for this exact failure pattern.”

“My name is [XXX], and I am writing today to express my complete frustration mentally and financially with a CPO 2021 Volkswagen Tiguan (VIN [XXX]) I purchased XXX. To date my vehicle has been in for service multiple times – countless times for an issue with the infotainment system and driver warning indicators that is still unresolved and again for months waiting on a new engine due to an oil consumption issue that was finally resolved November of 2025 (Case XXX). My recent service visit on XXX was due to a “12 v battery not charging” error message. The vehicle was immediately taken to VW of [XXX] where we were advised it would be 3 weeks before my vehicle would even be looked at (which is atrocious) and not to drive it because further damage would be caused with no alternative solution offered for transportation. I then had the vehicle towed to a repair shop where I was advised the alternator “fried a 400-amp fuse and killed the battery, which should not happen, especially on a vehicle that has less than 50,000 miles on the odometer.” I paid $1,605.37 for a new alternator, 400-amp fuse and battery. Completely appalling and disappointing considering I take…”

“Tha back up camera system is glitching out. We reset the system but is keeps freezing/blacking out after about 30 seconds. This is known issue with this model of Volkswagen.”

“Vehicle was just turned on and put into reverse. Dash and infotainment center lights flashed and shut off. Vehicle rolled backwards uncontrollably down a sloped driveway. Steering and brakes were not properly functioning. Vehicle came to a stop when it struck a parked vehicle in its path.”

“The contact owns a 2021 Volkswagen Tiguan. The contact stated that while his wife was driving slowly in traffic, several unknown warning lights illuminated orange, and the speedometer and RPM went to zero. In addition, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The contact stated that minutes later, the vehicle returned to function as intended. The contact's wife stated that after several minutes, the lights and indicators returned to normal function. A short while later, the failure reoccurred, and the vehicle failed to accelerate as intended while depressing the accelerator pedal. The vehicle then returned to function as intended. The contact stated that on a separate occasion, the driver’s side door failed to open. While using the key fob, the doors failed to open. The contact's wife tested the door, and the only door that opened was the rear passenger’s side door. The contact's wife opened the driver’s side door manually. The vehicle then failed to start. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. Three hours later, when the…”