BMW N54 Coolant Hose Radiator Water Pipe 11537545665 (11 53 7 545 665) - E60 E82 E89 E90 3.0 Twin Turbo - Fits 135i 335i 535i Z4 sDrive35i - Genuine OE OEM Engine Cooling Line Replacement

BMW OE Engine Cooling Hose | Part No. 11537545665 | E60 E82 E89 E90 3.0 Twin‑Turbo Petrol Applications

Stop coolant loss and protect your turbocharged straight‑six with this BMW OE engine cooling line, part number 11537545665. This factory part is the correct plug‑and‑play hose for selected E60, E82, E89 and E90 platforms running the 3.0 twin‑turbo petrol engine found in the 135i, 335i, 535i and Z4 sDrive35i. It restores tight sealing in the cooling circuit and keeps temperatures stable under daily driving, spirited road use and motorway miles.

We fit these in our workshop and on our own cars. Fitment is precise, the quick‑connect ends lock securely and our customers consistently report a clean, leak‑free result and long service life. If you are chasing a coolant smell, seeing pink residue, or dealing with swollen and perished rubber, this OE hose is the straightforward fix that gets your Bavarian six back to running cool and reliable.

• BMW original equipment for perfect alignment and factory connectors
• High temperature and pressure resistant for dependable sealing
• Direct swap with existing hose, no modification required
• Prevents coolant loss, hot‑running and top‑up hassles
• Ideal preventative maintenance on ageing cooling systems

Compatibility

Confirmed for the following chassis and models where applicable:

• BMW 5 Series E60 535i petrol
• BMW 1 Series E82 135i petrol
• BMW Z4 E89 sDrive35i
• BMW 3 Series E90 335i petrol

To guarantee the right part first time, we will verify fitment before dispatch. Add your UK registration or the last 7 of your VIN at checkout and our team will confirm compatibility for your vehicle.

Part Number

BMW Part No: 11537545665

Also searched as: 11 53 7 545 665, BMW OE cooling hose 11537545665, BMW water hose E60 E82 E89 E90, 135i 335i 535i Z4 35i cooling line.

Why choose this hose

Using genuine BMW hardware ensures the correct hose routing, proper quick‑connect couplers and the right internal diameter for stable coolant flow. It is the smart choice when chasing coolant leaks, random temperature spikes, expansion tank level drops or soft hose walls on turbocharged petrol sixes. Popular search terms this part answers: BMW engine cooling hose, BMW antifreeze line, E90 335i cooling pipe, E82 135i radiator line, E60 535i water hose, E89 Z4 35i coolant line, OE BMW hose replacement.

Installation

Professional fitting recommended. For expert installation, choose MJ Modifications in Warwickshire. Request a fitting quote: info@mjmodifications.co.uk.

Warranty

Two years manufacturer warranty for UK customers and one year for international customers when a VIN is provided at checkout on compatible vehicles.