There are two ways to deal with a bad MAF sensor: clean it or replace it. Both of these jobs are pretty easy, but they require some mechanical know-how and a handful of basic tools.

One dirty sensor could be hurting your car’s performance — learn which one it is, the symptoms to watch for, and how to clean it easily.

So, your M5 is occasionally entering the feared limp-mode and starts to feel as if you're driving a Prius. Moreover, it's always happening when you're trying to overtake someone.

NANCY Le BLANC A: Modern cars have low-friction engines, good aerodynamics, tall gearing and low-rolling-resistance tires, all of which contribute to increased brake wear.

One dirty sensor could be hurting your car's performance - learn which one it is, the symptoms to watch for, and how to clean it easily.