About this part
What it does. Wagner Brake Rear Disc Brake Rotor Wagner Brake 621-BD180521E is the disc the brake pads clamp onto to convert motion into heat and stop the wheel.
Symptoms that point to this part
- Pulsing brake pedal or steering wheel shudder
- Deep scoring or a lip on the disc face
- Blue heat spotting
Service note. Rotors are replaced in pairs per axle, together with fresh pads.
Fitment. Catalogued as fitting 2025–2026 Audi A5 Quattro, 2021–2025 Audi Sq5 Sportback, 2025 Audi A4 Allroad, 2021–2025 Audi Q5 Sportback, 2021–2025 Audi Q5 Phev, 2022–2024 Audi S5, 2019–2024 Audi Q5, 2019–2023 Audi Sq5, 2021 Audi A6 Quattro, 2020 Audi A7 Sportback, 2020 Audi S4. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.
Fits these vehicles
- 2026 Audi A5 Quattro
- 2025 Audi Sq5 Sportback
- 2025 Audi A5 Quattro
- 2025 Audi A4 Allroad
- 2025 Audi Q5 Sportback
- 2025 Audi Q5 Phev
- 2024 Audi Q5 Sportback
- 2024 Audi S5
- 2024 Audi Q5
- 2024 Audi Sq5 Sportback
- 2023 Audi S5
- 2023 Audi Sq5
- 2023 Audi Sq5 Sportback
- 2023 Audi Q5
- 2023 Audi Q5 Sportback
- 2023 Audi Q5 Phev
- 2022 Audi S5
- 2022 Audi Sq5 Sportback
- 2022 Audi Q5
- 2022 Audi Q5 Phev
- 2021 Audi Q5 Phev
- 2021 Audi A6 Quattro
- 2021 Audi Q5 Sportback
- 2021 Audi Sq5 Sportback
- 2020 Audi A7 Sportback
- 2020 Audi S4
- 2020 Audi Sq5
- 2020 Audi Q5
- 2019 Audi Sq5
- 2019 Audi Q5