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Details
| Specification | Value |
|---|---|
| Brand | A.B.S. |
| MPN | 51017x |
| Category | Master brake cylinder |
| Brake System | LUCAS/TRW |
| Length 1 [mm] | 40 mm |
| Length 2 [mm] | 122 mm |
| Thread Size 1 | 2x M12x1.0 |
| Piston Diameter 1 [mm] | 23.8 mm |
OE numbers (3)
Search by this OE number to find compatible parts
- VAG / AUDI—8D0 611 021A
- VAG / VW / AUDI—8D0 611 021B
- PORSCHE—996.355.910.00
Where this part fits
Original-fit position for OE 8D0611021A. The red ring marks where this part installs on the vehicle.
About this product
Sourced from A.B.S., this master brake cylinder (51017X) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Material: 57, Number of connectors: Aluminium, Brake System: LUCAS/TRW, Length 1 [mm]: 40 mm, Length 2 [mm]: 122 mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit AUDI, PORSCHE, VW models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 05-0260, 0 986 480 890, 1023.23, 107 359 and 52 more. Matching these numbers confirms a like-for-like replacement with no loss of function. A.B.S. is a recognised supplier of automotive braking components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (52)
Show all 52 OE numbers
Master brake cylinder A.B.S. 51017X — compatible car models
| Car models | AUDI: A4 B5 (8D2), A4 B5 Avant (8D5), A6 C5 (4B2, 4B4), A6 C5 Avant (4B5, 4B6); PORSCHE: 911 (996), 911 Convertible (996), 911 Targa (996), BOXSTER (986); VW: PASSAT B5 (3B2), PASSAT B5 Variant (3B5) |
|---|---|
| Engines | 1.6; 1.8; 3.4 Carrera; 3.6; 2.5 |
| Year of manufacture | 1994-2006 |
| Manufacturer article number (MPN) | 51017X |
| OE part numbers | 8D0 611 021A, 8D0 611 021B, 996.355.910.00 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
A.B.S. 51017x Master brake cylinder. Brake System: LUCAS/TRW. Length 1 [mm]: 40 mm. Length 2 [mm]: 122 mm. Material: 57. Number of connectors: 2. Number of mounting bores: 2. Piston Diameter 1 [mm]: 23,8 mm. Thread Size 1: 2x M12x1.0
- 1x Master brake cylinder
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Master brake cylinder compatible with my car?
This Master brake cylinder fits AUDI, PORSCHE, VW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this A.B.S. Master brake cylinder have?
This A.B.S. Master brake cylinder has the following specifications: Material: 57; Number of connectors: 2; Brake System: LUCAS/TRW; Length 1 [mm]: 40 mm; Length 2 [mm]: 122 mm; Thread Size 1: 2x M12x1.0. Check the full specifications table above for complete details.
What OE part numbers does this Master brake cylinder replace?
This Master brake cylinder replaces OE part numbers: 8D0 611 021A, 8D0 611 021B, 996.355.910.00. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Master brake cylinder cost?
This A.B.S. Master brake cylinder is available for £85.99. Master brake cylinder prices vary depending on brand, specifications, and vehicle compatibility. A.B.S. parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Master brake cylinder?
Regular inspection of your Master brake cylinder is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Master brake cylinder?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Master brake cylinder fitted by a professional mechanic.
Can I use this part as a replacement for OE 8D0 611 021A?
Yes, this A.B.S. Master brake cylinder is a direct replacement for OE part number 8D0 611 021A. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
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