About the Audi A5 Master Cylinder
This is the hydraulic command center of the A5's brakes, the assembly that transforms mechanical pedal force into precise pressure across all four wheels, as the live page describes. The unit is precision-machined aluminum with reinforced polymer seals, built to corrosion-resistant standards with sealing designed to maintain hydraulic integrity under all operating conditions, and engineered for direct replacement so installation stays simple.
Why A5 Owners Replace the Master Cylinder
The live FAQ names the classic symptoms: a soft or spongy pedal, a pedal that sinks gradually under steady pressure, and visible fluid leakage around the cylinder. Internally, aged seals bypass pressure instead of holding it, and on a car this capable, anything less than a firm, immediate pedal is a repair, not a quirk.
Things to Confirm Before Ordering
- Your model year within the first-generation 8T range, confirmed by VIN
- Fresh DOT 4 fluid for the install, per the live page specification
- Brake booster condition, the master cylinder's partner, checked while the cylinder is off
What Is Included, What Is Not Included
| Detail | Description |
|---|
| INCLUDED | The master cylinder unit as photographed. |
| NOT INCLUDED | Fluid reservoir where separate, brake fluid, booster, and lines. |
| Tools You Need | Flare-nut wrenches, fresh DOT 4 fluid, and a full system bleed after installation. |
Vehicle Compatibility
| Detail | Description |
|---|
| Audi A5, first generation 8T (donor 2007; US sales from the 2008 model year) | Year and VIN confirmed at order |
| Later A5 generations | Different part; call to check inventory |
| Reference Application | 2007 Audi A5 |
Fitment Assistance
Call (240) 301-0095 with your VIN. First-year 8T cars and US-market 2008s share the generation but deserve a part-number check, and we run it before the cylinder ships.
Condition and Inspection
This is a used master cylinder, inspected before shipping:
- Pressure-tested for seal integrity
- Bore checked smooth, no scoring or pitting
- Ports and fittings verified clean and undamaged
- Body inspected for cracks and corrosion
- Photos provided before purchase
Why Buy from Us
- Pressure testing on a part where seal integrity is everything
- First-generation 8T verification with the US model-year nuance handled
- Straight talk on a Used part, with condition documented in photos
- Free shipping to all 50 states, no hidden fees
- No core charge
- 15 day replacement warranty
How can I identify if my Audi A5's master cylinder requires replacement?
Watch for symptoms such as a soft or spongy brake pedal, gradual pedal sink, or visible brake fluid leakage around the master cylinder area.
What is the recommended replacement interval for master cylinders?
Replace when failure symptoms appear or as part of comprehensive brake system service; regular inspection every 50,000 kilometers is advisable.
Can I use alternative brake fluids with this master cylinder?
For optimal performance and longevity, we recommend adhering to DOT 4 brake fluid specifications as designed.
Will I notice improved brake performance after installation?
Yes, you should experience enhanced pedal firmness, improved response time, and overall superior braking confidence. Additional questions:
Which A5 years does this fit?
The first-generation 8T; the donor is a 2007 car, the model's first production year, which reached US showrooms as the 2008 model. We confirm your VIN before shipping.
What is the inspection interval in miles?
The live FAQ's 50,000-kilometer guidance works out to roughly 31,000 miles; a quick look at pedal feel and fluid level at every oil change is the practical habit.
Do I need to bleed the brakes after installation?
Yes, always: bench-bleed the new cylinder, then bleed the full system with fresh DOT 4 until the pedal is firm, since air anywhere in the circuit defeats the repair.
How does it ship?
Free shipping to all 50 US states with fast transit, the cylinder capped at the ports and boxed so it arrives clean and testing exactly as inspected.
