Audi A4 hesitation problems

Filed Oct 27, 2026 · Brakes · 108,902 miles · CA

The contact owns a 2017 Audi A4. The contact stated that while driving 45 MPH, the brakes engaged independently, hesitated momentarily and then the vehicle operated as intended. A dealer was contacted. The vehicle was taken to the dealer where it was diagnosed and determined that the brake booster needed to be replaced. The brake booster was replaced four times and the vehicle was repaired. The contact stated that the failure had occurred on several occasions. The manufacturer was notified of the failure but offered no assistance. The approximate failure mileage was 108,902.

Filed Jul 1, 2026 · Electrical · CA

The vehicle intermittently gives a false proximity/collision warning while stationary or while maneuvering at low speed. The sensors beep and display a warning on the screen as if an object is about to hit the vehicle, even when nothing around the vehicle has changed and no object is present. This appears to involve the parking/proximity warning system, sensor system, control module, wiring, calibration, or broader electrical/driver-assistance system. This is being reported as a safety concern because false collision/proximity warnings can distract the driver, reduce trust in the vehicle’s warning systems, cause unnecessary braking or hesitation, and may indicate a malfunction in the systems used for parking, low-speed maneuvering, and obstacle detection. No crash, fire, injury, or fatality occurred. The vehicle/component is available for inspection, and service communications, issue lists, photos/video if available, and related electrical/driver-assistance records are available if requested.

Filed Nov 13, 2023 · Engine · FL

Loss of power / Turning onto oncoming traffic there was severe hesitation. Which caused the car to not move onto oncoming traffic quick enough causing both oncoming vehicles to maneuver around. Upon going to the mechanic he states I have oil in the engine from faulty piston rings which he states he has seen multiple times in these models.

Filed May 3, 2013 · Acceleration, Fuel system · 45,607 miles · CA

Problem one the car was burning through a quart of expensive oil every 300 miles. Took it in,dropped the engine,changed all pistons,removed crankshaft oil seal,faulty high mount brake light,pressure regulating valve all replaced. Car was accelerating with and without hesitation,but dealer duplicated the occurrence and said they fixed. One month later,car smelled like gas and was taking off on it's own brought back dealer could not duplicate. Very bad smell of gas and rapid acceleration -dealer removed engine again replaced all valves,diagnosis purge valve stuck. Suspected injector seal.replaced 4 injector seals, smell persisted.replaced intake valve,remove and replace purge valve assembly. Pistons have all been replaced,engine has been completely removed twice, and the transmission is still jumping and the car accelerates by itself.audi refuses to recognize the problem , I have only 1200 miles left on warranty. I have only had this car 7 months and am afraid to drive but audi offers no options-I asked for extended warranty on the engine and they said no. I have the car in my possession with the acceleration issue and periodically smells of gas. I drive 3 children to and from .

Filed Jan 31, 2013 · Engine, Fuel system · 43,014 miles · MI

Car brought in for misfire condition that resulted in power reduction/hesitation while driving. Dealer detected faulty injector. Replaced injector and engine was still malfunctioning. Dealer then removed cylinder and observed piston ringland damage. Vehicle was starting to exhibit excessive oil consumption problems. Either faulty injector or piston ring defect is suspected to cause damage. Looking into remedies through arbitration or other means as audi is aware about (I.e. Undersized rings / pistons). I will retain all suspect parts as audi will not honor under warranty terms and independent shop will be performing repairs, and can be made available for further investigation. Excessive oil consumption is a known issue with audi USA. The manual states that normal consumption is up to 1 quart for every 1000 miles. Per audi's recommendations, you will burn 10 quarts of oil before you need an oil change. That engine holds 5 quarts when not leaking it through rings, reducing anti-knock rating of fuel during combustion. I believe this a significant safety hazard as engine seizing could unexpectedly occur due to defective components. I believe a class action lawsuit is inevitable.

Filed Aug 29, 2012 · Engine, Fuel system · 76,269 miles · CO

Car hesitated under acceleration at highway speeds resulting in total loss of power. Car continued to have acceleration and idling problems. Issues due to cam follower wearing prematurely causing major damage to high pressure fuel pump, intake and exhaust cams, damage to engine requiring total engine replacement.

Filed Oct 4, 2011 · Engine, Transmission · 36,120 miles · CA

Purchased the vehicle from mckenna audi in norwalk with 25,302 miles and oem warranty. The first issue was an unusual vibration from the engine at 29,761 mi. Audi of mission viejo claimed there was nothing wrong. At 36,120 mi, the transmission failed and was replaced. At 41,940mi, ignition coils were replaced after complaining of vibration/shuttering/hesitation. At 46,163mi, complained of shuttering/hesitation. Hose seals & timing belt roller were replaced. At 46,934mi, complained of same issues, audi of mv claimed there was nothing wrong. At 48,552mi, complained of burning smell coming from engine, rough idle and vibration. Cam plug and injector were replaced. At 52,811mi, the entire engine was rocking back and forth (have video). Circle audi of long beach replaced crank case & breather valve. Engine vibration/hesitation/shuttering continued after this repair. At 55,600mi, the vehicle suddenly without warning attempted to change into a lower gear (or park) while driving at 70 MPH on freeway. This major mechanical failure could have LED to injury or death. Vehicle was inoperable and towed to rusnak audi of westlake village, ca. The transmission was replaced for a second time, after less than 20,000mi. At 56,000mi, the car is now vibrating, shuttering, hesitating again (only 1,000mi on "new" transmission). It is displaying all of the same issues that LED up to the major mechanical failure on the freeway. Audi of mission viejo claims it is due to a leaking/cracked motor mount and improper transmission calibration. As you can see, the same issues have been occurring since time of purchase, and despite minor repairs, the transmission always fails. I believe the vehicle is irreparably flawed and unsafe. Audi of mv has also been neglected. Audi of america (corporate) has been contacted. My request for a buyback due to the dangerous nature of this vehicle has been denied.

Filed Sep 30, 2010 · Transmission · 11,100 miles · FL · crash

Parked in an incline, I attempted to back out of a drive way. I placed my foot on the brake and placed the car in reverse and removed my foot from the brake. The vehicle went forward as if in neutral with no resistance at all. I stepped on the brake quickly to prevent from going through the garage door. Although I depressed the accelerator the car was not moving in reverse. I had to get the engine RPM up fairly high to get the car to move at all. It was like I had the parking brake on but if I let up on the accelerator, the car would again roll forward. When the car reached the top of the drive, it quickly grabbed and accelerated. I stepped on the brake quickly but not before I hit a retaining wall behind me. This type of hesitation has also been experienced when in drive. Depressing the accelerator does not produce immediate results. Then starts to increase RPM's an then the car lunges forward. I have returned it to the audi dealer a few months ago for this exact problem. When the service man moved my car he immediately noticed the condition but it was returned to me "working as designed". For the next 2-3 months, the transmission was as responsive as any other auto but this has changed back to the way it was. Updated ivoq 10/26/10

Filed Jul 12, 2010 · Transmission · 119,000 miles · NJ

Tl*the contact owns a 2002 audi a4. While driving 30 MPH the contact noticed that all of the gear shift indicator lights on the instrument panel had illuminated. Within a few seconds, the vehicle failed to accelerate. The vehicle was taken to a local mechanic who informed the contact that the transmission needed to be replaced. Prior to the failure the contact noticed that the vehicle would hesitate while driving 40 MPH and shifting from 3rd to 4th gear. The vehicle was not repaired. The VIN was not available. The current and failure mileages were 119000.

Filed Mar 24, 2010 · Transmission · IL

I have an 2002 audi a-4 with a constant variable transmission. I have had hesitation problems on and off since 2002. Several repairs have been made and the dealer has never addressed the transmission hesitation. Since I don't drive the car very often, the transmission is finally skipping. The dealer indicates the car most likely is the beginning to show signs of the need for a new transmission. I generally keep my cars over 10 years and service them like a baby. This is disheartening, since the repairs would be more than the car is worth. My daughter had similar problems with her vs passat and after pouring money into it, problems continued. I am very disapointed and will not buy again.