2018 Volkswagen Tiguan electrical problems

ELECTRICAL SYSTEM

2018 VW Tiguan. The fuel injector harness failed. There is a NHTSA letter stating 2018-2019 Tiguans had this issue and there’s an extended warranty up to 120,000 miles. My Tiguan is at 91,000 miles, but VW is saying the warranty isn’t assigned to my VIN. So there’s a warranty for this exact issue and year, but my vehicle isn’t covered. This warranty obviously needs to be extended by build date as it’s a pretty costly repair.

NHTSA complaint #11732357 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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.

NHTSA complaint #11728207 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

My 2018 Volkswagen Tiguan experienced a failure of the airbag control module caused by water intrusion through the HVAC access area and failed seam seal tape at the cowl support. The dealership confirmed that water leaked through a factory seam, accumulated at the airbag module, and caused the module to fail. The airbag warning light is illuminated, and the system is inoperable. This failure matches the same defect pattern covered under Volkswagen’s recall campaigns for the Atlas and Atlas Cross Sport (water intrusion leading to airbag control module failure), but my VIN is not included. The root cause and safety implications are identical: water entering through a body seam/HVAC area and compromising the airbag system. This is a safety‑critical issue that disables the airbags and creates a risk of injury in a crash. I am requesting NHTSA review this defect for potential recall expansion. Dealership Findings: • Water present at airbag control module • Water leaking through HVAC access hole • Failed seam seal tape at cowl support • Water accumulation damaging the airbag module • Cowl trim cracked and repaired • Recommended replacement of airbag control module and seam sealing tape • Estimated repair cost: $1,377 + tax Safety Concern: Airbag system is disabled due to water intrusion from a factory seam. This creates a risk of injury or death in the event of a collision.

NHTSA complaint #11726578 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

One time the car Just Lost power on the freeway and the e-card engine light came on and the cat Ran rugh and stalled and jerked hard almost causing me to cause a serious accident...I took it to vw and explained the severity and they bypassed that And installed a new water pump..2months later the same thing happened exactly to where I was very lucky and very upset...and took it to them once again and explained more issues where I'm urging . As to the front warning light and motion has came into play a few times witch was shocking...also the car would be on slow mo mode....and constant warning lights would come on the dashboard as well as the car would feel so unstable and Feel as if it were On gear 1/L while in the drive position...also the Eco turn of feature would playout ..and stall from time to time..then the car would get stuck on speed when foot would come off the accelerator to brake before a stop sign or red light intersection witch just started to concern me and I again took these concerns to Rick case vw and They thought I was inventing this story..then the car leaked coolant..and it rusted out the whole bottom of my car ..hoses...and they replaced the thermostat this time around and now the car has misfired..could not start ..idle was ver rough and just vibrated dramatically and damaged coils and spakplugs and blew out fuel inject #2 and can't hold pressure past 30 ..changed out the spak plugs and coils and the car is just crippled and its a safety hazard and in many occasions has almost caused me to cause a serious accident...

NHTSA complaint #11704422 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

On September 19th 2025, while driving on the highway at normal speed, the instrument cluster fuel gauge misread the fuel level and indicated that the tank still had fuel. Without any warning light or low-fuel alert, the vehicle suddenly lost power because it was actually out of gas. I was traveling with my boyfriend and our three dogs. We became stranded on the shoulder of a busy highway as vehicles passed at 70–80 mph. The outside temperature was about 85-90 at the time. This created a serious safety hazard: The cluster’s inaccurate fuel reading prevented me from knowing we were nearly empty. The engine shut down unexpectedly, leaving limited steering and braking control as we coasted to the shoulder. We were exposed to high-speed traffic and extreme heat while waiting for assistance. Additional cluster/safety issues observed: No audible turn-signal “click” or indicator sound when using the blinker. No warning chime if the car is left running when the driver exits (for example, if the ignition is on but the door is opened or the key is removed). The vehicle is out of warranty, but the dealership diagnosed a failed instrument cluster and quoted about $2,500 for replacement. Why This Is a Safety Concern: The instrument cluster provides critical driver alerts. Inaccurate fuel readings, lack of turn-signal audio, and the absence of an engine-on warning chime all reduce driver awareness and can directly lead to dangerous situations on the road. Requested Action: I urge NHTSA to investigate whether the 2018 Volkswagen Tiguan’s instrument cluster/fuel-level system and related warning features contain a design or manufacturing defect and to consider a recall or other remedy to prevent accidents or injuries.

NHTSA complaint #11689357 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Vehicle sending transmission alarms and also exit vehicle in P mode only alarm. First had issue around 25,000 miles and gear shift assembly was replaced under warranty for what I was told was a faulty sensor. Same issue returned at 100,000 miles and Volkswagon is replacing the gear shift assembly again at customers expense. I was told by Volkswagon that the car is safe to drive.

NHTSA complaint #11610452 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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.

NHTSA complaint #11600555 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

EPC electronic power control light is on and indicates speed of 40 mph, transmission light on, car aggressively vibrating.

NHTSA complaint #11540171 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Solo prendieron la luz

NHTSA complaint #11531615 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

EPC electronic power control light is on and indicates speed of 40 mph

NHTSA complaint #11528869 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

fuel injector wire hardness failed , very costly to fix

NHTSA complaint #11519089 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

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.

NHTSA complaint #11490146 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

The dealership for my vehicle is over 70 miles away. My battery died and I went and replaced it. When I did all sorts of lights came on in my car, my power steering wouldn’t work, my cruise control wouldn’t work, and my AC wouldn’t work. I took it to the dealership to see what was going on with it. It turns out my battery was placed backwards in my car and when that happened it fried the fuse for my entire system, it broke my AC unit, it broke my alternator, and messed up my electrical system. Yes I do believe there is a risk to my safety with this issue. I could not turn my car when I drove it. I was told by service representative that this has been happening a lot more often with people who are just trying to change the battery. The only time the vehicle was inspected was by the service department at the dealership. No they’re weren’t any problems prior to failure and they appeared after the battery was placed.

NHTSA complaint #11483734 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

While driving down the highway, my car completely shut off and shut down while going 45mph. Due to everything shutting off, there were no brake lights, hazards, blinkers, etc that I was able to use to warn other drivers of what was happening, therefore I was almost hit multiple times. It turned back on, then back off while driving, 4 more times until the final time when it would not turn back on or turn over at all, I had to pull off the road and it wouldn’t turn back on again. At this time I got the battery tested and it was bad. I bought the new battery and the new battery didn’t change anything. It still was doing the same thing, not turning on at all. Not even trying to turn over to turn on. I had my vehicle towed to the Volkswagen dealership in Ocala on college road. While at this shop, they have told me that the NEW battery is what has cause the issues, which is incorrect as the issues began BEFORE I got a new battery. They are also saying that because I got a new battery that they will not cover the repairs under my warranty. I had to get in a new battery for my safety after almost being hit on the highway due to the electronics or other issues being faulty in the car.

NHTSA complaint #11477017 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Micro switch in driver door module I believe is the cause. I cannot open the door even when hitting the unlock button on the keys or inside the vehicle. All other doors will unlock and open fine but not the driver door. Safety issue comes that if I were to be in an accident, unconscious, people would be unable to get my door open even if unlocking it on the passenger side. Currently, I have to go through the passenger door and pull the inside handle to open the door.

NHTSA complaint #11458456 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

At 48k miles, fuel efficiency began to significantly drop. At next start up, engine would not turn over and EPC light came on. I waited 30 minutes, unlocked the steering wheel and was able to start the vehicle and EPC light turned off. I took it into Volkswagen dealership to have it looked over and they could not duplicate the issue nor find cause for lower fuel efficiency. The issue with fuel persisted intermittently. Then at 57k, while driving long distance, I noticed what seemed like misfiring when accelerating above 65 mph. There were no noises, no warning lights, and fuel efficiency seemed about the same. I continued driving and about 6 hours into my drive, EPC light came on, RPM's shot up to 4,000 and car began violently shaking while losing significant power and dropped down to 30 mph. I was in the left lane when it occurred and had to quickly move over to the right lane. The car then could not exceed 40 mph with the pedal held to the floor. I turned on my hazards while I continued driving an additional 30 miles to the nearest Volkswagen dealership. Because of how heavy the traffic was and the high speeds of the travelers, it put myself and my passengers at risk from not being able to accelerate, along with the other drivers having to either brake hard or quickly change lanes to avoid my car. At the Volkswagen dealership, diagnosis found code p0204 cylinder 4 injector. They confirmed 4th cylinder misfiring and replaced the fuel injector harness. Since that repair, my car has been shaking at idol, when initially taking off, and if I turn of the start/stop function.

NHTSA complaint #11457881 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Epc light came on and engine started to stall

NHTSA complaint #11435730 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

LIKE MANY OTHER COMPLAINTS I HAVE READ, AN ERROR APPEARS SAYING THE ENGINE HAD EXCEEDED 4000RPM, WHEN IT DOES NOT. THEN THE CAR DROPS DOWN TO 10 MPH AND WILL NOT EXCEED. THE CAR SHAKES UNCONTROLLABLY. THE CAR IS 28 MONTHS OLD AND HAS BEEN HAVING THESE ISSUES SINCE 6 MONTHS IN. THE CAR HAS BEEN AT VOLKWAGEN DEALERSHIPS FOR 3-4 WEEKS AT A TIME 4 TIMES ALREADY FOR THE SAME ISSUES. I HAVE FILED MULTIPLE COMPLAINTS WITH VOLKSWAGEN AND THEY HAVE DONE NOTHING TO RECTIFY THIS DANGEROUS SITUATION.

NHTSA complaint #11320877 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

WHEN ACCELERATING, ENGINE DOES NOT RESPOND ACCORDINGLY. ENGINE HESITATES TO ACCELERATE AND WILL STAY IN THE LOW RPMS DESPITE THE PEDAL BEING FULL PUSHED IN. AFTER A FEW SECONDS(MAYBE 15-30SEC), IT WILL RAPIDLY ACCELERATE CORRESPONDING TO WHERE THE PEDAL IS. THIS CONSTANTLY HAPPENS, IT HAS OCCURRED EVER SINCE I PURCHASED THE VEHICLE 1 YEAR AGO. I CANNOT TELL IF IT IS AN ISSUE WITH THE ENGINE, THE TRANSMISSION, OR THE ELECTRICAL COMPONENTS BETWEEN THE 2. IT MAKES TRYING TO MERGE ONTO A HIGHWAY, ACCELERATE INTO ANOTHER LANE, OR TURN ONTO A STREET VERY DANGEROUS AS I CANNOT BE CERTAIN WHEN IT WILL ACCELERATE. THIS ISSUE OCCURS IN ALL MODES (ECO, NORMAL, SPORT). I HAVE TAKEN THIS TO A DEALERSHIP ONCE BUT THEY SAID THEY COULDN'T FIND ANYTHING WRONG WITH IT. ADDITIONALLY, THERE IS AN ISSUE WITH THE SIDE PASSENGER SEATBELT SENSOR. IT KEEPS GOING OFF IF I HAVE MY PHONE CHARGING SITTING ON TOP OF IT OR IF I REST MY HAND ON THE SEAT.

NHTSA complaint #11319180 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

I BOUGHT A CAR FROM VW SOUTH ORLANDO 7 MONTH AGO AND SINCE THAN I HAD A LOT OF ISSUE WITH THE CAR ENGINE LIGHT WAS GOING ON AND OFF I BEEN THEIR LIKE 5 TIMES NOW AND JUST PISSING ME OFF I WANT A REPLACEMENT CAR

NHTSA complaint #11307251 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

ON MULTIPLE OCCASIONS, SUBJECT VEHICLE DISPLAYED CHECK ENGINE LIGHT AND EPC LIGHT AT RANDOM INTERVALS, CAUSING CAR TO UNEXPECTEDLY BE LIMITED TO 4,000 RPM AND UNABLE TO ACCELERATE PAST 40MPH. AS A RESULT, THIS PUT DRIVER IN EXTREMELY UNSAFE SITUATIONS AND ENDANGERED SAFETY OF PASSENGERS AND FELLOW DRIVERS, PARTICULARLY ON HIGHWAY. FIRST ENCOUNTERED AT 34,000 MILES ON ODOMETER. PERSISTED THROUGH 41,000 MILES. SECONDS BEFORE ERROR IS ENCOUNTERED, VEHICLE WOULD RUN ROUGH AND UNDERGO ROUGH SHIFTS. IN ADDITION, VEHICLE ALSO SUFFERED WITH SLUGGISH ACCELERATION FROM STOP. VEHICLE TAKEN TO SERVICE CENTER MULTIPLE OCCASIONS. ON FIRST ENCOUNTER, TECHNICIAN INSTRUCTED SIMPLY TO RESET VEHICLE. WHEN TAKEN SECOND TIME, CODE P0203 INJECTOR SHORT CIRCUIT CYL 3 WAS DIAGNOSED AND ENGINE HARNESS REPLACED. HOWEVER, ISSUE CONTINUED. WHEN TAKEN THIRD TIME, INJECTOR HARNESS REPLACED.

NHTSA complaint #11288361 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

TL* THE CONTACT OWNS A 2018 VOLKSWAGEN TIGUAN. THE CONTACT STATED THAT THE OUTSIDE TEMPERATURE SENSOR WAS NOT OPERATING PROPERLY. THE CONTACT STATED THAT THE VEHICLE DISPLAYED IMPROPER TEMPERATURE READINGS AND THE SENSOR ALSO CONTROLLED THE VEHICLE'S COOLING FANS. THE FANS OPERATED INDEPENDENTLY DUE TO THE OUTSIDE SENSOR. THE CONTACT TOOK THE VEHICLE TO DICK HANNAH VOLKSWAGEN OF PORTLAND (12345 E BURNSIDE ST, PORTLAND, OR 97233, (503) 622-9507) WHERE THE PART WAS REPLACED; HOWEVER, THE FAILURE CONTINUED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND REFERRED THE CONTACT TO NHTSA. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 20,000.

NHTSA complaint #11271701 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

NOTHING BUT PROBLEMS WITH MY SISTER'S LEASED 2018 TIGUAN.... REPEATED SERVICE CALLS...CONSTANTLY IN THE SHOP...CURRENTLY A WHOPPING 10 RECALLS...AIRBAG NOT WORKING... NO HELP FROM VOLKSWAGEN..CALLED CUSTOMER SERVICE...PUSHED NUMBER AS DIRECTED... NOTHING! COULDNT SPEAK TO A HUMAN BEING...TRIED CHAT OPTION ON FACEBOOK...NO REPLY! NOTHING IN THIS CAR WORKS PROPERLY. ASKED TO BE LET OUT OF LEASE... APPARENTLY NOT POSSIBLE UNLESS IT HAS THE SAME EXACT ISSUE 3 TIMES!! MY CAR HAS HAD ISSUES IN MULTIPLE AREAS REPEATEDLY BUT NOT SPECIFICALLY MEETING LEMON LAW STANDARDS. $400 PAYMENT AND NO HELP. SHE WILL NEVER BUY A VOLKSWAGEN AGAIN AND I WILL MAKE SURE TO TELL EVERYONE I KNOW TO AVOID VOLKSWAGEN AT ALL COST! MAY HAVE TO SPEAK TO A LAWYER I GUESS.

NHTSA complaint #11270813 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

LEAKING SUNROOF DRAIN CAUSES THE COMPUTER TO MULFUNCTION AND REPORT MULTIPLE CAR ISSUES, LIKE: FAULT: ELECTRONIC PARKING BRAKE ERROR: ABS/ELECTRONIC STABILIZATION CONTROL (ESC) ERROR: AIRBAG THIS HAPPENS EVERY TIME THERE IS A HEAVY RAIN

NHTSA complaint #11269068 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

ON NORMAL DRIVING COLLISION LIGHT COME ON AND BRAKES LOCK FOR FEW SECONDS

NHTSA complaint #11243494 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

STOP/START FUNCTION ON NEW TIGUAN IS BEHAVING ERRATICALLY. ON A COUPLE OF OCCASIONS, WHEN THE FOOT BRAKE IS APPLIED THE CAR STOPS, BUT WILL NOT START AGAIN WHEN FOOT IS LIFTED OFF THE BRAKE. BRAKE GOES HARD AND WILL NOT DEPRESS. ENGINE HAS TO BE SWITCHED OFF AND ON AGAIN FOR CAR TO MOVE. MOST RECENT OCCASION HAPPENED WHILE TURNING INTO TRAFFIC, NEEDED TO BACK UP AND COULD NOT. THANKFULLY ONCOMING TRAFFIC WAS JUST BARELY ABLE TO SWERVE AROUND ME.

NHTSA complaint #11208844 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

IGNITION WAS ON, DOORS LOCKED WITH KEY INSIDE BUT NO ONE WAS IN THE CAR OR LOCKED THE DOORS.

NHTSA complaint #11208512 — an unverified report by a vehicle owner.