Vehicle price comparison
Mercedes S Class vs Audi Q7 Master Cylinder prices
Saurabh Kumar
Co-Founder & CTO, Part Price Guide
Built the pricing pipeline that collects and normalizes used OEM part listings from salvage yards and online marketplaces across the US.
Ambika Sharma
Co-Founder & COO, Part Price Guide
12 years of project management and technical operations experience. Reviews price guides for sample size, fitment accuracy, and data freshness.
Price face-off
Median price comparison
Condition comparison
How does the price differ by part grade?
Market analysis
Why does the Audi Q7 master cylinder cost more?
A used Audi Q7 master cylinder carries a median asking price of $100, which is 13% higher than the Mercedes S Class at $87. Supply also plays a role: Mercedes S Class has 1,219 priced listings versus 422 for Audi Q7, and more listings generally mean more choices and more competitive pricing.
The Audi Q7 average ($123) runs 23% above its median ($100), indicating a tail of high-priced listings — likely low-mileage or remanufactured units pulling the average up.
Only 65% of Mercedes S Class master cylinder listings include a posted price (1,219 of 1,881 observed) — the rest are "call for price," which usually signals negotiable or higher-than-average pricing.
Buyer's checklist
What to check before buying a used brake master cylinder
- Verify reservoir port style, fluid level sensor connector pin count, and brake line flare port sizes and locations (metric vs imperial threads).
- Check bore size specifications, as vehicles equipped with heavy-duty tow packages or larger brake calipers use larger diameter master cylinder bores.
- Inspect primary and secondary piston bore seals for internal bypass leaks, fluid weeping at the brake booster mounting flange, or dark sludge build-up.
- Confirm whether the unit is designed for vacuum-assisted, hydro-boost, or electro-hydraulic brake systems.
Full price guide
Mercedes S Class Master Cylinder
$45 – $175 · 1,219 listings
Full price guide
Audi Q7 Master Cylinder
$30 – $305 · 422 listings
Common questions
Mercedes S Class vs Audi Q7 master cylinder FAQ
Is a used Mercedes S Class master cylinder cheaper than a Audi Q7?
Mercedes S Class has the lower median by $13 (13%). The Mercedes S Class master cylinder ranges from $45 to $175 across 1,219 listings, while the Audi Q7 ranges from $30 to $305 across 422 listings.
Can I use a Mercedes S Class master cylinder in a Audi Q7?
This comparison describes pricing, not interchangeability. Even when two parts share similar prices, they may require different engines, trims, electronics, or mounting points. Always match the seller's part number against your VIN before purchasing.
How many listings does this comparison cover?
This comparison draws from 1,219 priced Mercedes S Class listings and 422 priced Audi Q7 listings — 1,641 in total.
How does condition grade affect the price?
Part condition significantly impacts price. Grade A (Excellent): Mercedes S Class $99 vs Audi Q7 $115. Grade B (Good): Mercedes S Class $100 vs Audi Q7 $121. Grade C (Fair): Mercedes S Class $76 vs Audi Q7 $121. Grade A parts are in excellent condition, B is good, and C is fair — always confirm grading criteria with the seller.
Are there different trim variants to choose from?
Yes. The Mercedes S Class master cylinder has 1 trim variant and the Audi Q7 has 2. Variants differ by engine size, drivetrain, or part number — matching the right variant is critical for proper fitment.
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