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.
Volkswagen Tiguan door locks problems
23 of the 2,354 owner complaints about the Volkswagen Tiguan describe doors won't lock, open or latch, most of them for the 2018 model year.
- owner complaints
- 23
- worst model year
- 2018
- typical mileage
- 31,000
By model year
Often reported together
Key fob 3Screen failure 3Airbag light 2Warning lights 1Seat belt 1Overheating 1Jerking 1
What owners say
The vehicle experiences sudden loss of motive power during acceleration. Between 30–60 mph, the transmission fails to upshift correctly, causing the engine RPMs to spike to 5000 while the vehicle fails to gain speed. This creates a severe safety hazard when merging into high-speed traffic. Additionally, the infotainment system frequently blackouts and reboots while driving, and there are intermittent malfunctions with the power windows and door locks. Authorized dealerships have been unable to resolve these persistent safety defects after multiple repair attempts.
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.
The infotainment center freezes and spontaneously disconnects. At first, I though it was my phone and switched carriers. It was not. It also does not recognize my key is present and I have to pshycially lock and unlock it. Sometimes the doors won't open and it happens several times. It is unsafe when I am driving and the gps goes out and I have been distracted, missed turns and put myself and others in danger. Also, you can only get gas if the doors are unlocked. This is not safe becasuse someone could take your purse or child while you are pumping gas. The vehicle has been updated, keys replaced but nothing has helped the issue. There were no warning lights.
I had unlocked the doors with the botton on the door handle with my key in my purse. I was putting my kids in the car and put the key in the car. I closed all of the doors with the key in the car and it automatically locked with the car off in the summer heat. Luckily my oldest was able to unlock the car from the inside. My other child is 2 and wouldn’t have been able to do it.
Passenger door (front) will not open with fob or door lock/unlock button. You can not open the door from the outside. Driver has to reach across to use the door latch. Won’t unlock with app either.
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.
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.
I put my groceries in the passenger side of my car and walked around to my driver's door. I touched the button on the door handle to unlock the door and it didn't work. I tried the key fob and it also did not work. I tried another key fob and it still did not work. I had to end up calling the dealership and they told me how to take off the door handle cover to use the manual key, which was difficult to pry off, and also scratched the car. This seems like it could be a safety issue. This could have easily been a mother putting her child in a car seat and walking around to get in the vehicle.
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.
Related recalls
Latches/locks/linkages
- What is wrong
- Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2016 CC vehicles manufactured January 12, 2016, to February 3, 2016, Golf R and Tiguan vehicles manufactured November 25, 2015, to January 28, 2016, and e-Golf vehicles manufactured November 25, 2015, to January 11, 2016. Vibrations, such as those created by opening and closing a vehicle door, may cause the rear child door locks to disengage, allowing a child to open a rear door while inside the vehicle.
- Risk
- If an unrestrained child unexpectedly opens a door, they may fall from the vehicle increasing their risk of injury.
- Remedy
- Volkswagen will notify owners, and dealers will inspect, and if necessary, replace the child lock(s), free of charge. The recall began on August 22, 2016. Owners may contact Volkswagen customer service at 1‑800‑893‑5298. Volkswagen's number for this recall is 58C9.
Recall number 16V464000 · Recall details
Questions about the Volkswagen Tiguan door locks
Which Volkswagen Tiguan years have doors won't lock, open or latch problems?
The model years with the most reports are 2018 (5 complaints), 2019 (5 complaints) and 2014 (3 complaints).
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