These aluminum adapters are a direct, high-strength replacement for the factory plastic water pump connectors used on BMW S58 engines.
The original plastic adapters are known to crack or break — and when that happens, BMW only sells the complete water pump assembly, typically costing $500–600 USD.
This kit provides a far more durable and cost-effective solution.
• CNC-machined from high-quality aluminum for maximum durability
• Direct replacement for BMW part number 11518054857 / 8054857
• Same dimensions and fitment as OEM plastic connectors
• Supplied with Viton O-rings for proper sealing and heat resistance
• Installs exactly like the original connectors
• Prevents the need to replace the entire water pump assembly
Installation Tip:
Lightly lubricating the adapter makes it easier to slide into the rubber coolant hoses.
These adapters fit BMW models equipped with the S58 engine, including:
• BMW X3M (F97)
• BMW X4M (F98)
• BMW M3 (G80)
• BMW M4 (G82)
• 11518054857
• 8054857
• 11 51 8 054 857
• (S58O — water pump connectors)
• 2 × Aluminum water pump adapters
• Viton O-rings (pre-installed)