Have a 2009 Audi A4 which has been running rough with the check engine light on, especially at idle for two days. The dealer described it as a large vacuum leak, and estimated ~$1000 to replace the intake manifold, etc.

Will bring it to an independent mechanic who is usually good, but in the mean time, is it safe to drive the car in this condition?

(There are also apparently unrelated oil leaks coming from the "the front of the engine").

  • Is the car stalling under hard braking?
    – Zaid
    Commented Dec 2, 2015 at 13:45
  • @Zaid No seems ok while braking.
    – Dan1701
    Commented Dec 2, 2015 at 13:54
  • 2
    Your fuel mileage might be terrible, but not going to kill you in the short term. Why does the manifold need to be replaced? Crack? $1000 seems extreme for a vacuum leak, no?
    – JPhi1618
    Commented Dec 2, 2015 at 15:06
  • @JPhi1618 Ok, thanks. I don't have all the details to be honest, but I think the motor? was broken.
    – Dan1701
    Commented Dec 2, 2015 at 15:34
  • 2
    If it doesn't stall it should be fine, oxygen sensors will take care of it, but it should suck driving. Commented Dec 2, 2015 at 15:44

1 Answer 1


Its fine if you drive it, but you might want to get it fixed as soon as possible, because it decreases the power of your vehicle and it could possibly harm your engine.

  • As a follow up, yes it was fine for a few days to drive. No further problems cropped up, and the mileage didn't seem too far from normal.
    – Dan1701
    Commented Dec 29, 2015 at 4:38

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .