2018 Volkswagen Tiguan: doors won't lock, open or latch

Filed Oct 9, 2026 · Electrical, Lights · LA

Suspected Electrical Defect and Potential Fire Hazard – 2018 Volkswagen Tiguan SEL I am reporting a suspected electrical safety defect involving the sunroof wiring harness in my 2018 Volkswagen Tiguan SEL. While my vehicle was parked, an attempt was made to replace a blown F23 fuse. Smoke began coming from the sunroof area and filled the cabin. Afterward, multiple warning lights illuminated, the vehicle displayed a “turn car off” warning, the door locks repeatedly cycled, the climate control stopped working, and the infotainment/navigation screen shut off and restarted. A mechanic subsequently determined that the sunroof wiring harness had melted and required replacement. I was informed that the wiring harness (part number 5NA971648C) is unavailable and has been placed under Volkswagen’s “quality inspection” process due to suspected fire-hazard concerns. Volkswagen reportedly no longer supplies this harness separately, requiring replacement of the entire sunroof assembly, including the glass, even though the glass is not the source of the problem. The repair is estimated at $3,900 and requires extensive labor, including dashboard removal and a VIN-specific part from Germany. My primary concern is safety, not cost. A wiring harness that melts and produces enough smoke to fill a vehicle’s cabin could potentially cause a fire, damage other electrical systems, or endanger occupants. I am concerned other owners may face the same hazard. I request that the federal safety agency investigate whether the sunroof wiring harness or associated electrical system in 2018 Volkswagen Tiguan vehicles presents a safety defect, review similar reports, and determine whether further investigation or corrective action is warranted.

Filed Mar 31, 2026 · Airbags, Electrical · NY

The contact owns a 2018 Volkswagen Tiguan. The contact stated that while driving at an undisclosed speed, the parking brake independently activated, and the air bag warning light illuminated. In addition, while attempting to turn off the vehicle, the key failed to function as intended. The vehicle was driven to the shoulder of the road and turned off. The contact stated that while attempting to start the vehicle, several unknown warning lights were illuminated. The parking brake was not activated. Additionally, the front driver's side door latch failed to unlatch as needed. The contact stated that none of the electrical system features functioned as intended. The vehicle was taken to the dealer, where it was diagnosed with a failed wiring harness and a failed front driver's side door harness. The contact was informed that the wiring harness and front driver's side door harness needed to be replaced. The vehicle was not repaired. The dealer reset the codes. The contact was informed that until the repair was performed, the failure would recur. The contact referenced an unknown recall with a similar failure; however, the VIN was not associated. The manufacturer was not made aware of the failure. The failure mileage was unknown.

Filed Jul 9, 2024 · Electrical · MD

Door lock system Child trapped inside due to vehicle locking itself with keys in car after putting child in car seat and bag inside. Fire department used a slim jim through window to press unlock button; however, the vehicle would not unlock via interior door button. Fire department had to pull interior door handle to unlock, taking an additional 45 minutes to free child trapped inside. The problem has been reproduced. Without the ignition on, door locks will not attempt to unlock the vehicle unless the vehicle is already unlocked. Dealer confirmed issue and is stating there are numerous low voltage fault codes including the battery and passenger front and rear door latches. Vehicle has been inspected by the manufacturers dealer on 7/9/2024 at fire department's recommendation during incident. There were not any warning lamps, messages or other symptoms of the problem prior to or after the failure.

Filed Sep 20, 2023 · AZ

The automatic door locks are malfunctioning (starting early September 2023). When the vehicle accelerates, the automatic door locks continuously engage, repeatedly, causing audible distractions while driving. This is a safety issue because with three kids in the rear, the doors are not locked while driving. Typically, once you accelerate from park above a certain speed, the door locks automatically engage. Now they go on/off continuously while at all speeds, including highway speed. Now the doors can be opened, and the noise itself is considerably distracting. It also allows for anyone, while parked at a stoplight or freeway exit, to open the doors. The dealership inspected it and quoted over $900 for the repairs, however I do not agree with this assessment. For a 2018 $30k+ vehicle, a basic function like this should not be malfunctioning. This is not normal wear and tear like brake pads. The cost to repair is unreasonable, and it is not covered under the warranty. There are no warning lights and indicators appearing on the vehicle noting the issue. The issue is ongoing every instance the vehicle is driven and we do not feel safe due to the distraction or the possibility of kids opening the doors while driving (or someone on the outside). The dealer also advised there's a possibility the locks will further malfunction and we could get locked inside or outside the vehicle. Again, neither of those scenarios are safe, especially living in a hot climate like Phoenix, AZ.

Filed Oct 20, 2022 · Body, Electrical · FL

The front passenger door locking system does not function properly. The door intermittently is unable to be unlocked or opened from the outside and must manually be opened from the inside. The door also intermittently doesn't lock. This is a safety concern for thieves. If in immediate danger, ie. accident, no one is able to open the passenger door to access the person. No indication lights appear on the vehicle.