Sonax Wheel Cleaner Plus (25.4 oz)

Brake dust from European pads can bond to wheel surfaces fast, and once it bakes on after a few drives, regular soap and water barely touches it. Sonax Wheel Cleaner Plus is an acid-free formula in a 750ml (25.4 oz) bottle that tackles exactly that kind of buildup without risking damage to your finish.

What sets this cleaner apart is the color-changing chemistry. Spray it onto a cool, dry wheel and within seconds you will see the formula shift to a deep red or purple wherever it contacts ferrous metals and iron particles from brake dust. That color change is not just for show — it tells you the active ingredients are breaking the bond between contamination and your wheel surface. After two to four minutes of dwell time, agitate stubborn spots with a wheel brush and rinse clean. Sonax rates the current formula at 30 percent stronger than their previous version, so caked-on grime from high-heat braking comes off more readily.

Because it is pH-balanced and acid-free, this cleaner is safe for chrome, aluminum, steel, clear-coated, painted, PVD, and even magnesium wheels. It is a popular pick among owners of Mercedes, BMW, Audi, and Volvo models where semi-metallic pads generate heavy dust, but it works just as well on any vehicle with stubborn wheel contamination.