The NRF coolant expansion tank (455027) 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: 7421883431, Length [mm]: 520 mm, Width [mm]: 380 mm, Height [mm]: 210 mm, Capacity [litre]: Zinc l. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 102641, 19057003, 21360161, 215743 and 16 more. Matching these numbers confirms a like-for-like replacement with no loss of function. NRF is a recognised supplier of automotive replacement 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.

NRF, founded in 1927 in the Netherlands, is Europe's leading specialist manufacturer of cooling and climate control components. NRF specialises in radiators, condensers, evaporators, compressors, heater cores, and cooling fans. As an OE supplier to major manufacturers and with products tested to exceed factory specifications, NRF ensures reliable thermal management for all vehicle types. With nearly a century of cooling expertise and the largest product range in the sector, NRF is the first choice for heating, cooling, and air conditioning repairs.