High sales Radiator Cap 17117639022 for BMW 5 Series F07 GT LCI 550i

If you are sourcing reliable cooling‑system spare parts for BMW premium vehicles, our high‑sales radiator cap, also known as coolant expansion tank cap, with OE number 17117639022 is an excellent aftermarket option for your business. This pressure‑regulated tank cap is specially manufactured to fit BMW 5 Series F07 GT LCI 550i equipped with N63 4.4L V8 turbo engine, and also compatible with multiple BMW chassis including F10, F12, F13, F01, F02 and other models sharing the same 2‑bar pressure specification. Installed on top of coolant expansion reservoir, it maintains stable preset pressure inside the cooling circuit, raises coolant boiling point, releases excess pressure when temperature rises, and draws liquid back into tank during cooling phase. It protects expansion tank, radiator, water pump and hoses from pressure overload, and prevents premature overheating failure. This product maintains steady market demand and is widely stocked by auto repair garages, engine rebuild specialists and international distributors across Europe, the Middle East, North America and other global automotive aftermarket markets.

The radiator cap works under continuous pressure‑cycling environment. It continuously withstands high‑temperature steam erosion, repeated pressure release and reset cycles, engine compartment heat radiation and ageing stress of rubber sealing components during long‑term driving. After prolonged service, worn or inferior radiator caps will trigger a series of typical failures. Common symptoms include coolant overflow from expansion tank, white antifreeze residue around cap sealing surface, unstable system pressure, frequent engine over‑heating warning, expansion tank cracking caused by over‑pressure, and hidden risk of hose burst. If the defective radiator cap is not replaced in time, abnormal pressure fluctuation will damage expensive cooling components and bring high repair cost. Low‑quality radiator caps usually adopt low‑grade plastic housing, fatigue‑prone spring and poor‑aging‑resistance rubber gasket. They suffer from inaccurate pressure‑opening value, seal failure and early spring fatigue under real‑world working conditions. Our 17117639022 radiator cap is professionally engineered to resolve these common cooling‑system faults.

We adopt premium high‑temperature‑resistant engineering plastic for cap housing, calibrated pressure spring and high‑elasticity EPDM rubber sealing gasket for manufacturing this radiator cap. Strict spring calibration guarantees accurate 2‑bar opening pressure to match original system requirement. Rubber sealing ring features outstanding heat‑resistant and anti‑ageing performance to resist long‑time coolant steam corrosion. Thread structure and outer dimension are fully reproduced according to OE standard, ensuring smooth screwing‑in and tight fitment on expansion tank filler neck. Strict component matching technology guarantees precise pressure regulation performance for BMW F07 GT LCI 550i cooling system.

Every radiator cap 17117639022 is manufactured strictly in accordance with OE specifications. Key parameters including overall dimension, thread specification, spring pressure value, sealing ring size and installation stroke fully match original standards. It supports direct drop‑in replacement without cutting, grinding or secondary modification during maintenance work. Professional service technicians can finish replacement efficiently, saving labour costs for repair workshops. After replacing the faulty original unit with our qualified radiator cap, stable cooling‑system pressure can be restored, coolant overflow and tank‑cracking risks eliminated, and stable engine operation of BMW 5 Series F07 GT LCI 550i can be guaranteed. VIN verification is strongly recommended before installation to confirm proper fitment.

Comprehensive quality control runs through the whole production process. We carry out raw‑material inspection, dimensional verification, pressure‑opening calibration test, high‑temperature ageing test, cyclic pressure fatigue test and finished‑product sealing inspection. All finished radiator caps pass strict off‑line inspection to secure consistent and stable quality. We select qualified raw materials and strike a good balance between reliable performance and competitive factory price. Compared with expensive original spare parts, our aftermarket radiator cap provides cost‑effective maintenance solutions for vehicle owners.

As an essential cooling‑system wearing spare part for BMW F07 GT LCI 550i maintenance, radiator cap 17117639022 is a must‑stock product for your BMW spare‑parts catalogue. We support one‑stop procurement of radiator caps, expansion tanks, water pumps, coolant hoses, thermostats and other cooling‑system components. Stable continuous supply, flexible minimum‑order quantity and efficient delivery cycle are available for global auto‑parts dealers, importers and repair centres. Bulk orders enjoy favourable wholesale prices. We can provide clear product pictures, specification sheets and accurate vehicle‑fitment information to support your online‑store operation and offline sales promotion.

When BMW 5 Series F07 GT LCI customers face coolant overflow, tank leakage or abnormal over‑heating faults, experienced technicians tend to recommend OE‑standard 17117639022 radiator cap. Fitting low‑quality radiator caps will easily result in pressure‑value deviation, seal failure and hidden damage to whole cooling circuit. Our high‑performance radiator cap features accurate pressure control, anti‑ageing sealing performance and long service life, making it a profitable hot‑selling product for your auto‑parts business.

We sincerely welcome buyers all over the world to send inquiries for quotations, stock updates and relevant technical materials. We aim to establish long‑term stable win‑win cooperation. We continuously supply premium BMW auto spare parts, satisfy your diversified purchasing demands and help you further expand your local automotive aftermarket market.