- Shop with confidence: competitive prices, exclusive deals, and delivery perks.
- Need it quickly? We dispatch fast-moving parts daily. Check delivery options.
- Swap or return items within the standard return period with a simple process.
- Questions about fitment or orders? Our support team is ready to help.
Similar products
Customers also bought
Details
| Specification | Value |
|---|---|
| Brand | KNORR-BREMSE |
| MPN | ef90ab |
| Weight [kg] | 1,715 kg |
| Stroke [mm] | 50 mm |
OE numbers (12)
Where this part fits
Original-fit position for OE 4464477. The red ring marks where this part installs on the vehicle.
About this product
The KNORR-BREMSE Diaphragm Brake Cylinder (EF90AB) 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: Weight [kg]: Steel, 715 kg, Stroke [mm]: 50 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 004713104, 04713104, 11299809, 2520947 and 10 more. Matching these numbers confirms a like-for-like replacement with no loss of function. KNORR-BREMSE 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
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (2)
Diaphragm Brake Cylinder KNORR-BREMSE EF90AB — compatible car models
| Manufacturer article number (MPN) | EF90AB |
|---|---|
| OE part numbers | 004713104, 04713104, 11299809, 2520947, 42032531, 42042531, 4464477, 4713104, 5021134711, 637209350, 6771754, P63276J10 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
KNORR-BREMSE ef90ab . Stroke [mm]: 50 mm. Weight [kg]: 1,715 kg
- 1x Diaphragm 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 Diaphragm Brake Cylinder compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Diaphragm Brake Cylinder fits. All fitment data is verified through TecDoc.
What specifications does this KNORR-BREMSE Diaphragm Brake Cylinder have?
This KNORR-BREMSE Diaphragm Brake Cylinder has the following specifications: Weight [kg]: 1,715 kg; Stroke [mm]: 50 mm. Check the full specifications table above for complete details.
What OE part numbers does this Diaphragm Brake Cylinder replace?
This Diaphragm Brake Cylinder replaces OE part numbers: 004713104, 04713104, 11299809, 2520947, 42032531, 42042531, 4464477, 4713104 and 4 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Diaphragm Brake Cylinder cost?
This KNORR-BREMSE Diaphragm Brake Cylinder is available for £251.99. Diaphragm Brake Cylinder prices vary depending on brand, specifications, and vehicle compatibility. KNORR-BREMSE parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Diaphragm Brake Cylinder?
Regular inspection of your Diaphragm 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 Diaphragm 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 Diaphragm Brake Cylinder fitted by a professional mechanic.
Can I use this part as a replacement for OE 004713104?
Yes, this KNORR-BREMSE Diaphragm Brake Cylinder is a direct replacement for OE part number 004713104. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
.JPG&w=3840&q=75)
