DISC BRAKE ROTOR
Give your rear brakes a fresh, smooth braking surface with the HELLA Brakes Brake Rotor 355123142, a full-cast, internally vented gray cast iron rotor with high carbon content and a zinc coating for rust protection. It fits a wide range of Audi and Porsche models, among them the 2018-2024 Audi S4, 2017-2024 Audi A4 Allroad and 2017-2024 Audi A4 Quattro, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list.
Specifications: 330 mm (12.99 in) outside diameter; 22 mm (0.87 in) nominal thickness; 20 mm (0.79 in) minimum/discard thickness; 35.8 mm overall height; 6 bolt holes on a 112 mm (4.41 in) bolt circle; 68 mm (2.68 in) centering diameter; 15.4 mm wheel bolt bore. Silver, coated finish; standard replacement grade.
Each disc brake rotor is sold individually. The listed applications use two per vehicle, so we recommend replacing both rear rotors together as a matched pair for even, balanced braking. The wheel hub, wheel studs, bearings and ABS tone ring are not included. HELLA specifies installation by qualified personnel. Country of origin: China.
Are these Audi S4 rotors for the 2018-2024 model?
Yes. HELLA 355123142 is listed as a rear rotor for the 2018-2024 Audi S4, all engines, and the S4 uses two on the rear axle.
What does a rear brake rotor do?
It provides the friction surface the brake pads clamp against, turning motion into heat as you slow down. This internally vented rotor is designed to help dissipate that heat.
What are the key specs of HELLA 355123142?
330 mm (12.99 in) outside diameter, 22 mm nominal and 20 mm minimum thickness, 6 bolt holes on a 112 mm bolt circle, and a 68 mm centering diameter.
What is included in the box?
One rear brake rotor. The wheel hub, wheel studs, bearings and ABS tone ring are not included.
What are signs the rear rotors may need replacing?
Common signs include a pulsating brake pedal, grinding or scraping noises, deep scoring, or a rotor worn to its 20 mm minimum thickness. Diagnose the cause before replacing parts.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.