Volkswagen Passat Common Problems

ELECTRICAL SYSTEM

Owners of the 2018 Volkswagen Passat frequently report issues with the electrical system, particularly involving the infotainment screen, wiring harness, and battery. Common symptoms include the infotainment screen becoming unresponsive or going black, wiring harness failures leading to abnormal sounds and acceleration issues, and battery failures causing stalling and the inability to restart. These issues are often reported around mileages of 35,000 to 136,000. Safety concerns are noted in cases where electrical failures lead to loss of engine propulsion or unintended vehicle movement, including one incident involving a crash when a vehicle rolled backwards after being turned off while in drive. These patterns suggest potential risks for used car buyers considering this model.

Severity signals: 1 crash, 0 fire, 0 injury reports

SERVICE BRAKES

Owners of the 2018 Volkswagen Passat frequently report issues with the service brakes, including ABS sensor warnings and intermittent ABS activation during normal braking, which can lead to reduced stopping ability. Some complaints describe excessive heat in the front brakes despite replacing pads and rotors, and others mention a whistling noise and slippage in wet conditions. A particularly severe incident involves a crash where a brake caliper detached, causing loss of control. These issues appear at varying mileages, with some reports occurring shortly after purchase, and one complaint notes a brake-related safety recall not disclosed at the time of sale. Safety implications are significant, given the reported crash and instances of brake failure.

Severity signals: 1 crash, 0 fire, 0 injury reports

ENGINE

Owners of the 2018 Volkswagen Passat frequently report issues related to excessive oil consumption, with some noting the problem occurring under 7,000 miles and others around 90,000 miles. Complaints also mention the illumination of the EPC and check engine lights, often accompanied by vehicle shaking, as well as intermittent stalling, particularly at stops. Additional issues include failures in the intake manifold runner and air pump control valve, which may lead to increased emissions and potentially hazardous situations like limp mode on highways. While no crashes or fires are reported, these symptoms suggest potential reliability concerns for prospective buyers.

SERVICE BRAKES

Owners of the 2021 Volkswagen Passat report issues with the service brakes, particularly involving premature rear brake wear. Complaints frequently mention rear brake replacements needed at relatively low mileage, often between 5,000 and 20,000 miles, with some owners experiencing this issue on multiple vehicles. Additionally, one owner describes an unexpected auto brake engagement while driving, causing an abrupt stop. These issues suggest potential safety implications, such as unexpected braking and uneven brake wear, which could be significant for used car buyers to consider.

UNKNOWN OR OTHER

Owners of the 2020 Volkswagen Passat report several issues, with the most common being a persistent Check Engine Light linked to the secondary air injection system, specifically diagnostic trouble code P0491. This issue involves conflicting diagnoses and unresolved repairs, sometimes attributed to the secondary air injection combination valve or a potential cylinder head assembly failure. Additionally, complaints mention the CarNet system becoming non-functional and ineligible for support, and issues with the vehicle not accelerating despite engine noise, as well as loss of engine power during turns. Some owners note these problems occurring after several years of ownership. Safety concerns are flagged in relation to emissions system failures and loss of engine power during vehicle operation.

ELECTRICAL SYSTEM

Owners of the 2019 Volkswagen Passat frequently report issues with the vehicle's electrical system, particularly involving the remote start feature, which fails to function as intended. Complaints describe the vehicle turning over but immediately dying when the remote start is used. Additionally, multiple owners note problems with the start/stop button, where the vehicle fails to start and displays a "No Key Detected" message. These issues are reported at various mileages, with one owner noting trouble as early as 15,000 miles. Safety implications are highlighted by reports of the collision avoidance system activating unexpectedly, causing abrupt stops without any apparent obstruction, although no crashes or injuries are reported. These patterns suggest potential reliability concerns for used car buyers considering this model.

FUEL/PROPULSION SYSTEM

Owners report several issues with the fuel propulsion system of the 2018 Volkswagen Passat, notably involving fuel pump control module failures and fuel pump leaks. Common symptoms include a strong gasoline odor, vehicles failing to start, and battery drainage overnight due to the fuel pump control module continuing to run. These issues have been noted at various mileage points, with some owners incurring significant repair costs. Safety implications are suggested by reports of gasoline leaks, which could potentially lead to fires. Buyers should be aware that similar issues have been documented in other Volkswagen models and forums.

AIR BAGS

Owners of the 2018 Volkswagen Passat frequently report issues related to airbag system malfunctions. Commonly mentioned symptoms include persistent sensor warnings for airbag malfunctions and seat belt alerts, often occurring soon after purchase in used condition. Some owners describe repeated failures of the clockspring, impacting systems like adaptive cruise control and electronic stability control, with one instance leading to unintended brake engagement. A serious safety implication is highlighted by a crash at 45 to 50 mph where neither frontal nor side airbags deployed. These issues suggest potential reliability concerns for prospective used car buyers, particularly regarding sensor and airbag system functionality.

Severity signals: 1 crash, 0 fire, 0 injury reports