Compare Audi A4 loss of power repair quotes from specialist garages

Since it was founded in 1909, Audi has been at the forefront of automotive innovation. It was the first to conduct crash tests, one of the first to use a dual-clutch gearbox, and in 1921, became the first German manufacturer to make a production car, the Audi Type K, with left-hand drive.

Impressively, Audi is also the most successful carmaker in the history of the World Car Awards, winning 11 titles since 2005 and five World Performance Car Awards as of 2022. Find out whether Audis are expensive to repair in this guide or take a look at how their maintenance costs compare with SEAT and Skoda.

Few things are as frustrating for a driver as realising your car doesn't have as much power as it should. Small changes in performance matter and are most noticeable during acceleration. Your car may suddenly lose and then regain power or feel sluggish all the time; either way, it's clear there's something wrong.

A loss of power can often be traced back to a problem in the fuel system, such as a clogged fuel filter, faulty injectors or a malfunctioning MAF sensor. Running a cleaning additive through the system every so often can help prevent issues like these from developing. However, the fuel system isn't always to blame.

As discussed in this guide, an ECU error or a clogged catalytic converter can also make your car lose power - that's why you should take note of any other symptoms that could help pinpoint the cause. These may include unusual exhaust smoke (blue, white or black) and rough idling.