Engine Piston Kit Ring for BMW E81 E87 F20 F21 120d 123d 318d 320d 520d X3 20d N47 N47D20A 11257810825 11257807289 STD 050

Is your BMW 1 Series (E81/E87), 2 Series (F20/F21), 3 Series, 5 Series or X3 currently experiencing power loss, abnormal oil consumption or difficulty starting? This is typically a direct manifestation of the wear and aging of the core components inside the N47 and N47D20A diesel engine. We have specially developed the original factory standard piston kit (part number: 11257810825 / 11257807289) for this high-performance diesel engine. This kit provides a complete solution including pistons, piston rings and accessories, and is a professional choice for engine major repairs, controlling "oil consumption" and restoring power. It aims to restore your beloved car to its excellent compression ratio and fuel economy.

Addressing the issue of abnormal consumption of engine oil in diesel engines 
Repair the power reduction and insufficient compression caused by the wear of the piston assembly. 
Preventive maintenance of the engine and performance restoration 
Applicable to BMW 1 Series/3 Series/5 Series/X3 and other models equipped with N47 2.0L diesel engine (including the entire 116d-325d series)

Precise original factory matching, perfect compatibility guarantee
Manufactured strictly in accordance with BMW original factory technical specifications, the core part numbers 11257810825 and 11257807289 ensure a 100% perfect match with the N47/N47D20A 2.0L diesel engine. Its standard size (STD) design is suitable for the original factory cylinder block, and it also offers an 0.50 mm repair grade option to provide precise repair solutions for different degrees of cylinder wear, ensuring that the cooperation gap of the engine core components is restored to the best state. 
Exquisite material and craftsmanship to withstand the harsh conditions of diesel engines
The piston is made of high-strength eutectic aluminum alloy, featuring excellent heat resistance and wear resistance. The piston ring assembly is made of special alloy steel and undergoes precise surface treatment (such as phosphating or PVD coating), ensuring stable sealing in the high compression ratio and turbocharged environment of diesel engines. The specially designed oil ring can effectively control the upward movement of engine oil, fundamentally solving the common problem of oil consumption in diesel engines. 
Restore engine core performance and enhance fuel efficiency
By re-establishing precise cylinder sealing, this kit can effectively restore engine compression pressure, significantly improve cold start performance, and enhance low-speed torque response. The optimized combustion chamber seal also leads to more efficient combustion, helping to reduce fuel consumption and decrease exhaust emissions, allowing your BMW to regain its factory power level and meet environmental standards. 
Complete set solution - Professional maintenance guarantee
We offer a complete set including the piston body, compression ring, oil scraper ring and spring. Professional repair shops can obtain all necessary components at once, avoiding matching errors caused by decentralized procurement, significantly improving the efficiency and quality reliability of major repairs, and ensuring that the engine can withstand long-term high-load operation after reconstruction.