2020 Volkswagen Passat Complaints

UNKNOWN OR OTHER,ENGINE — Filed 03/03/2025

2020 Volkswagen Passat SE 2.0L VIN: [XXX] Complaint Summary: I am reporting a persistent and unresolved fault involving the secondary air injection system (DTC P0491 – insufficient airflow) that has resulted in repeated, conflicting diagnoses across multiple repair facilities. This raises concerns about a potential systemic defect affecting this vehicle model. Detailed Description: The issue began prior to March 2025 while the vehicle was still under warranty. The vehicle displayed a Check Engine Light associated with diagnostic trouble code P0491 (secondary air injection system insufficient airflow). On April 3, 2025, a repair facility diagnosed the issue as a failed secondary air injection pump and replaced the component. However, the Check Engine Light returned within 24 hours with the exact same fault code, indicating that the repair did not resolve the issue. A second independent diagnostic evaluation was performed later in April 2025. This inspection confirmed that: The secondary air injection pump was functioning correctly Airflow through the system was present Electrical controls and PCM commands were operating properly The fault was attributed instead to a mechanically stuck secondary air injection combination valve Despite this revised diagnosis, the issue has remained unresolved. As of 2026, a dealership evaluation has now attributed the same fault condition to a potential failure within the cylinder head assembly, indicating a significantly more serious underlying condition. Safety Concern: This issue involves the emissions and engine air management system and has resulted in: Persistent Check Engine Light Repeated failure of emissions-related components Conflicting and escalating repair diagnoses across multiple qualified service providers I am requesting that the National Highway Traffic Safety Administration review this issue for potential investigation into a systemic defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

STEERING,AIR BAGS,FORWARD COLLISION AVOIDANCE — Filed 12/11/2025

Steering wheel controls stopped working, no horn either. Probably no airbag but haven't got into an accident. There was recall on the same part for the until 2018, but the new part I was going to install lists that if fits cars 2016-2022 Part # 5K0-953-569-BC Recall from VW. Number: VWP-18-11, Will replace part for my fiance,

AIR BAGS,FORWARD COLLISION AVOIDANCE — Filed 03/17/2025

Error message alerted to maintenance needed and the air bag light has turned on and remained on. Also said message that front assist inls unavailable.

ENGINE — Filed 10/01/2024

Oil pressure sensor fails. Causing high oil pressure. Causing the valve cover to be destroyed and the oil pan to leak. Draining the car oil.

UNKNOWN OR OTHER — Filed 04/22/2024

VIN: [XXX] Dealership: Vanguard Volkswagen 6900 Burnet Rd Austin, TX 78757 I bought 2020 Passat back in Aug 2020 with CarNet included. It was showing that CarNet will be installed later when available at no cost. So in 2021 they installed carnet and everything was working fine up until 2024. The light turned off and no connection to the car. I called CarNet and they told me that most likely an issue with HW module and suggested to take to the dealer to get reset/replaced. Went to the dealer few days ago. Left them a car for 3 days for diag. No fault codes. So dealer sent a ticket to the Volkswagen to see how to proceed. I got a call from dealership today that Volkswagen responded to them that 2020 Passat is no longer eligible for the CarNet. Excuse me? At the time of sale CarNet was included. It was working fine no issues. And now Volkswagen taking car feature away that it came with and I paid for.. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

ENGINE — Filed 02/14/2024

Bought car from dealer. Vw Manhattan. 42000miles. 8 months later at 53000 miles. Engine problems. Went to Vw service. Head gasket. Lemon car. Warranty till 50000 miles. Cost? 4800$ Worse car possible.

UNKNOWN OR OTHER — Filed 09/04/2023

Our vehicle will not speed up after accelerating but you can hear the engine making noise like it’s trying to speed up. We have taken our vehicle 3-4 times back to the dealership and they have told us they found nothing.

FUEL/PROPULSION SYSTEM — Filed 02/01/2024

Car wasn’t pulling up the road the epc light came on had to have my vehicle rolled to the next dealer which was 36 miles from where I was. I was traveling from grapevine tx and it start acting up in Huntsville tx. Came out of pocket 1085.00 and that was with a discount for the fuel injector #3 My warranty expired 3000 miles ago. I am the first owner on my vehicle.

STEERING,ELECTRICAL SYSTEM,AIR BAGS — Filed 07/31/2023

My clock spring isn’t working after having my vehicle for barely a year. My air bag light is currently on. I can’t use my horn nor use any of the controls on my steering wheel. I’ve paid already 800 plus on previous car issues such as my harness hose. I’m still awaiting reimbursement. Further review and assistance needed.

ENGINE AND ENGINE COOLING — Filed 04/15/2021

The contact owns a 2020 Volkswagen Passat. The contact stated while driving at various speeds, the vehicle made abnormal sounds. The contact stated that the vehicle started independently, and the Driver Assist function engaged independently. Additionally, the contact stated that the vehicle was swerving unintendedly and would vibrate while driving. The vehicle was taken to the dealer several times; however, the dealer informed the contact that they could not duplicate the failure. The dealer later replaced the brake rotors; however, the failure persisted. The electronic power control (EPC), the Adaptive Cruise Control and low oil pressure warning lights were illuminated. Additionally, the message "Front Assist Error" was displayed. The vehicle was taken to the dealer, where it was diagnosed that the brake caliper was fractured. The vehicle was not repaired. The contact stated that the dealer had previously replaced the thermostat as the message "Coolant Error" was displayed on the instrument panel. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 7,000.