10.0

really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
43,330 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2009 Audi A4 engine problems

engine problem

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2009 Audi A4 Owner Comments

problem #3

Dec 202017

A4

  • 92,000 miles

A D V E R T I S E M E N T S

Driving home from work, all of a sudden my vehicle was revving while it was idle and at low speed, making it very difficult and dangerous to steer the car and keep it under control. Upon inspection, it was found that the timing chain tensioner had failed and had caused serious engine damage, causing the pistons to fire prematurely. Previously the tensioner was replaced in 2014 by Audi when the car had ~50K miles and was reported as a "weak tensioner". my car currently has 92K miles. I believe that no replacement tensioner should only last 40K miles and cause catastrophic engine failure and put consumers at risk of not being able to control their cars.

- Nashville, TN, USA

problem #2

Feb 162013

A4 6-cyl

  • 37,991 miles
I was just parking the car and was about 5 mph and suddenly car got accelerated unintentionally to higher RPM and hit the curb and above cement wall. Even applying brakes hadn't slowed down the vehicle because it was just few feet away.

- Nashua, NH, USA

problem #1

Apr 032012

A4 4-cyl

  • miles
On two occasions, April 3, 2012 and April 9, 2012, while traveling with the cruise control set at 78 mph, without touching the control or accelerator, the control setting jumped to 90 mph and the vehicle began to rapidly accelerate. When the brake was applied, the cruise control disengaged.

- Baton Rouge, LA, USA

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