Quiet your rear brakes with the BOSCH QuietCast Disc Brake Pad Set BC1898, a rear-axle brake pad set built to Bosch's QuietCast standard. It's a direct-fit replacement for the listed applications, including the 2017-2020 Audi A4, A4 Allroad and A4 Quattro, the 2018-2020 Q5, S4, S5 and SQ5, and additional A5, A6, A7, RS5 and Q5 PHEV variants — see the Buyer's Guide tab for the full list. If your rear pads are worn to the wear indicators, squealing, or down on material, this set replaces them.
A protective transfer layer is designed to extend pad and rotor life, and synthetic lubricant is included for the sliding contact points. Backed by Bosch's OE braking heritage dating to 1927.
This part cross-references / interchanges with the following part numbers:
Does this set fit an Audi A4?
Yes — this BOSCH QuietCast brake pad set is a direct-fit rear set for the 2017-2020 Audi A4, A4 Allroad and A4 Quattro. Confirm your exact year and model in the Buyer's Guide tab.
Is this a front or rear brake pad set?
This is a rear-axle set. It services the rear brakes on the listed Audi applications; you'll need a separate set for the front.
Are these pads copper-free?
Yes. Bosch's patented copper-free ceramic and semi-metallic QuietCast friction formula is compliant with 2025 copper-free legislation.
How do I know when my rear pads need replacing?
Common signs include squealing or grinding, reduced braking, or wear indicators contacting the rotor. If worn pads are the cause, this set replaces them.
Do I need to replace pads on both sides?
Best practice is to replace both rear wheels together as a matched set for even, balanced braking. Inspect your rotors during the job as well.
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.
