2008-2017 Audi A4/A5/Q5/S4/S5/SQ5/allroad Brake Master Cylinder 8K0611021A
OEM Part #: 8K0-611-021-A (8K0611021A)
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The exact part you’ll receive — not a stock photo.
$109.99
Used
Donor2015 Audi Q5 · 2.0L
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Genuine OEM Used
SKU: 702788
Donor Vehicle: 2015 Audi Q5 · 2.0L
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$109.99
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A used genuine OEM Audi Brake Master Cylinder, part number 8K0611021A, also replaces 8R0611021. This component pressurizes brake fluid when you push the pedal, converting that force into hydraulic pressure at each caliper. A failing master cylinder often causes a soft, sinking pedal or a visible fluid leak near the firewall. This unit was removed from a donor vehicle and is ready for installation.
Specifications
| Fits Vehicle Model | A4, A5, allroad, Q5, S4, S5, SQ5 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8K0-611-021-A (8K0611021A) |
| Compatible OEM Part No | 8R0-611-021 |
| Category | Master Cylinder |
Compatible Vehicles
Fits 63 vehicle configurations across 1 make, 2008-2017.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 63 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2016 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2015 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2014 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2013 | Audi | allroad | Wagon | 2.0L l4 Turbo | |
| 2012 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2011 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2012 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2011 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2011 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2010 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2012 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2017 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2009 | Audi | A5 | Quattro Coupe | 3.2L V6 | |
| 2011 | Audi | Q5 | SUV | 3.2L V6 | |
| 2008 | Audi | A5 | Quattro Coupe | 3.2L V6 | |
| 2009 | Audi | A4 | Quattro Sedan | 3.2L V6 | |
| 2009 | Audi | Q5 | SUV | 3.2L V6 | |
| 2010 | Audi | Q5 | SUV | 3.2L V6 | |
| 2010 | Audi | A5 | Quattro Coupe | 3.2L V6 | |
| 2012 | Audi | Q5 | SUV | 3.2L V6 | |
| 2010 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2010 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2012 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2017 | Audi | SQ5 | SUV | 3.0L V6 Supercharged | |
| 2011 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2012 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2010 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2011 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2010 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2011 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2012 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2011 | Audi | A5 | Convertible | 2.0L l4 Turbo | |
| 2010 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | |
| 2012 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2014 | Audi | SQ5 | SUV | 3.0L V6 Supercharged | |
| 2015 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2015 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2015 | Audi | SQ5 | SUV | 3.0L V6 Supercharged | |
| 2008 | Audi | S5 | Coupe | 4.2L V8 | |
| 2009 | Audi | S5 | Coupe | 4.2L V8 | |
| 2010 | Audi | S5 | Coupe | 4.2L V8 | |
| 2010 | Audi | S4 | Sedan | 3.0L V6 Supercharged | |
| 2010 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2011 | Audi | S5 | Coupe | 4.2L V8 | |
| 2011 | Audi | S4 | Sedan | 3.0L V6 Supercharged | |
| 2011 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2012 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2012 | Audi | S5 | Coupe | 4.2L V8 | |
| 2012 | Audi | S4 | Sedan | 3.0L V6 Supercharged | |
| 2013 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2013 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2014 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2014 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2016 | Audi | Q5 | SUV | 3.0L V6 Diesel Turbo | |
| 2016 | Audi | SQ5 | SUV | 3.0L V6 Supercharged | |
| 2016 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2016 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2017 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2014 | Audi | Q5 | SUV | 3.0L V6 Diesel Turbo | |
| 2015 | Audi | Q5 | SUV | 3.0L V6 Diesel Turbo |