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Details
| Specification | Value |
|---|---|
| Brand | AUTOFREN SEINSA |
| MPN | d1644 |
| Diameter [mm] | 24 mm |
OE/OEM numbers (11)
Search by this OE number to find compatible parts
- MAZDA—B4Y3-43-40Z
- MAZDA—B4Y3-43-41Z
- MAZDA—B4Y3-43-41ZA
- MAZDA—BCYA-43-41ZA
- MAZDA—EAY3-43-41ZA
- MAZDA—GA5R-43-61Z
- MAZDA—GA5T-43-40Z
- MAZDA—GA5T-43-40ZA
- MAZDA—GAY5-43-40ZC
- MAZDA—GAY5-43-40ZD
- MAZDA—GAZA-43-412A
Where this part fits
Original-fit position for OE GAY54340ZC. The red ring marks where this part installs on the vehicle.
About this product
The AUTOFREN SEINSA Repair Kit Brake Master Cylinder (D1644) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Diameter [mm]: 24 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit MAZDA 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: 100-20489, 123078, 200-21561, 200-21651 and 19 more. Matching these numbers confirms a like-for-like replacement with no loss of function. AUTOFREN SEINSA 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 from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Suitable cars
Equivalent products (12)
Repair Kit Brake Master Cylinder AUTOFREN SEINSA D1644 — compatible car models
| Car models | MAZDA: 323 F VI Hatchback (BJ), 323 S VI Saloon (BJ) |
|---|---|
| Engines | 2.0 D; 2.0 D (BJ1) |
| Year of manufacture | 1998-2004 |
| Manufacturer article number (MPN) | D1644 |
| OE part numbers | B4Y3-43-40Z, B4Y3-43-41Z, B4Y3-43-41ZA, BCYA-43-41ZA, EAY3-43-41ZA, GA5R-43-61Z, GA5T-43-40Z, GA5T-43-40ZA, GAY5-43-40ZC, GAY5-43-40ZD, GAZA-43-412A |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
AUTOFREN SEINSA d1644 . Diameter [mm]: 24 mm
- 1x Repair Kit Brake Master Cylinder
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- 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 Repair Kit Brake Master Cylinder compatible with my car?
This Repair Kit Brake Master Cylinder fits MAZDA 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 AUTOFREN SEINSA Repair Kit Brake Master Cylinder have?
This AUTOFREN SEINSA Repair Kit Brake Master Cylinder has the following specifications: Diameter [mm]: 24 mm. Check the full specifications table above for complete details.
What OE part numbers does this Repair Kit Brake Master Cylinder replace?
This Repair Kit Brake Master Cylinder replaces OE part numbers: B4Y3-43-40Z, B4Y3-43-41Z, B4Y3-43-41ZA, BCYA-43-41ZA, EAY3-43-41ZA, GA5R-43-61Z, GA5T-43-40Z, GA5T-43-40ZA and 3 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Repair Kit Brake Master Cylinder cost?
This AUTOFREN SEINSA Repair Kit Brake Master Cylinder is available for £14.99. Repair Kit Brake Master Cylinder prices vary depending on brand, specifications, and vehicle compatibility. AUTOFREN SEINSA parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Repair Kit Brake Master Cylinder?
Regular inspection of your Repair Kit Brake Master 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 Repair Kit Brake Master 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 Repair Kit Brake Master Cylinder fitted by a professional mechanic.
Can I use this part as a replacement for OE B4Y3-43-40Z?
Yes, this AUTOFREN SEINSA Repair Kit Brake Master Cylinder is a direct replacement for OE part number B4Y3-43-40Z. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the AUTOFREN SEINSA D1644 the same as the AUTOFREN SEINSA D1011?
No, while both are Repair Kit Brake Master Cylinder parts, they are different products. The AUTOFREN SEINSA D1644 has Diameter [mm]: 24 mm. The AUTOFREN SEINSA D1011 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
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