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Details
| Specification | Value |
|---|---|
| Brand | ERT |
| for OE number | 6J21-26-03Z |
| Fitting Position | Rear Axle |
| Diameter [mm] | 18 mm |
OE numbers (7)
Search by this OE number to find compatible parts
- MAZDA—6J21-26-03Z
- MAZDA—8BB2-26-681
- MITSUBISHI—AY220-MT003
- MAZDA—B216-26-03Z
- MITSUBISHI—D4100-2U625
- MITSUBISHI—MB193621
- MITSUBISHI—MB193622
Where this part fits
Original-fit position for OE B2162603Z. The red ring marks where this part installs on the vehicle.
About this product
The ERT Repair Kit Wheel Brake Cylinder (300354) 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: for OE number: 6J21-26-03Z, Fitting Position: Rear Axle, Diameter [mm]: Composite mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit KIA, MAZDA, MITSUBISHI 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: 04-0464, 0 986 475 661, 101-464, 214107B and 34 more. Matching these numbers confirms a like-for-like replacement with no loss of function. ERT 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 (31)
Show all 31 OE numbers
Repair Kit Wheel Brake Cylinder ERT 300354 — compatible car models
| Car models | KIA: RIO I Hatchback (DC), RIO II (JB), RIO II Saloon (JB), RIO I Saloon (DC), SHUMA II (FB), SHUMA II Saloon (FB); MAZDA: 323 C IV (BG), 323 F IV (BG), 323 III Station Wagon (BW), 323 S IV (BG), 626 III Coupe (GD), 626 III (GD), 626 III Hatchback (GD), 626 III Station Wagon (GV); MITSUBISHI: COLT IV (CAA), GALANT V (E1A), GALANT VI (E3A), GALANT VI Saloon (E3A), LANCER III Station Wagon (C1V, C3V), LANCER IV (C6A, C7A), LANCER IV Hatchback (C6A, C7A), SAPPORO III (E16A), SPACE WAGON (D0V/W), SPACE WAGON (N3W, N4W) (+1 more) |
|---|---|
| Engines | 1.3; 1.4 16V; 1.6; 1.3 16V (BG3S); 1.6 16V (BG6S, BG6P); 1.3 (BW103); 1.3 16V (BG3P); 1.8 (GD8P); 1.6 (GD106); 1.8 (GV8W); 1.3 GLi 12V (CA1A); 1.6 GLX (E11A); 1.8 (E32A); 1.5 (C12V); 1.3 (C61A) (+5 more) |
| Year of manufacture | 1983-2011 |
| Manufacturer article number (MPN) | 300354 |
| OE part numbers | 6J21-26-03Z, 8BB2-26-681, AY220-MT003, B216-26-03Z, D4100-2U625, MB193621, MB193622 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
ERT 300354 . Diameter [mm]: 18 mm. Fitting Position: HA. for OE number: 6J21-26-03Z
- 1x Repair Kit Wheel 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 Repair Kit Wheel Brake Cylinder compatible with my car?
This Repair Kit Wheel Brake Cylinder fits KIA, MAZDA, MITSUBISHI 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 ERT Repair Kit Wheel Brake Cylinder have?
This ERT Repair Kit Wheel Brake Cylinder has the following specifications: for OE number: 6J21-26-03Z; Fitting Position: HA; Diameter [mm]: 18 mm. Check the full specifications table above for complete details.
What OE part numbers does this Repair Kit Wheel Brake Cylinder replace?
This Repair Kit Wheel Brake Cylinder replaces OE part numbers: 6J21-26-03Z, 8BB2-26-681, AY220-MT003, B216-26-03Z, D4100-2U625, MB193621, MB193622. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Repair Kit Wheel Brake Cylinder cost?
This ERT Repair Kit Wheel Brake Cylinder is available for £3.99. Repair Kit Wheel Brake Cylinder prices vary depending on brand, specifications, and vehicle compatibility. ERT 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 Wheel Brake Cylinder?
Regular inspection of your Repair Kit Wheel 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 Repair Kit Wheel 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 Repair Kit Wheel Brake Cylinder fitted by a professional mechanic.
Can I use this part as a replacement for OE 6J21-26-03Z?
Yes, this ERT Repair Kit Wheel Brake Cylinder is a direct replacement for OE part number 6J21-26-03Z. 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 ERT 300354 the same as the ERT 300042?
No, while both are Repair Kit Wheel Brake Cylinder parts, they are different products. The ERT 300354 has for OE number: 6J21-26-03Z, Fitting Position: HA, Diameter [mm]: 18 mm. The ERT 300042 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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