SPCRSO Aluminum Water Hose Fitting Replacement for BMW E82 E88 E90 E91 E92 E93 E60 E61 E63 E64 E65 E66 F07 F10 F11 F12 F13 N52 N53 N54 N51 Engines Replace 11537541992 11537544638

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✅ Fix Common Leak Issues
The OEM plastic hose fitting is a well-known weak point in BMW’s cooling system, prone to cracking and leaking over time. Our upgraded aluminum replacement solves this problem permanently by offering superior durability and leak resistance.

✅ Upgraded Aluminum Construction
Made of high-strength 6061 billet aluminum with precision CNC machining. Unlike plastic fittings, this aluminum version is wear-resistant, heat-resistant, and corrosion-proof—no more cracking or aging under engine heat.

✅ Improved Cooling Efficiency
Our fitting features a smoother inner wall and increased diameter compared to the factory plastic part, resulting in better coolant flow and improved thermal performance.

✅ Direct Replacement Design
No modification required. Simply remove the OEM fitting and install our upgraded one. This fitting connects directly to the cylinder head; no need to remove the hose from the thermostat side.
Includes:

  • 1 x Aluminum Water Hose Fitting

  • 1 x Stainless Steel Hose Clamp

  • 1 x Rubber O-Ring Seal

✅ Wide Compatibility
Replaces OEM part number: 11537541992 / 11537544638

✅ Vehicle Compatibility

⚠️ Note: This fitting is not compatible with 1/3/Z4 Series running N52/N53 engine, nor with 5/6/7 Series running N54 engine.

✅ For BMW 1/3/Z4 Series (N54 engine only):

  • 1 Series

    • E82 Coupe / E88 Convertible: 135i (N54), M Coupé (N54T)

  • 3 Series

    • E90/E91/E92/E93 Sedan, Touring, Coupe, Convertible (2006–2013): 335i, 335xi, 335is (N54/N54T)

  • Z4

    • E89 Roadster (2009–2016): Z4 35i (N54/N54T)

✅ For BMW 5/6/7 Series (N52/N53 engine only):

  • 5 Series

    • E60/E61 Sedan & Touring (2004–2010): 523i, 525i, 528i, 530i, 530xi (N52/N53)

  • 6 Series

    • E63/E64 Coupe & Convertible (2004–2010): 630i (N52/N53)

  • 7 Series

    • E65/E66 Sedan (2004–2008): 730i, 730Li (N52)

Installation Tips

  1. Remove the two 10mm bolts holding the OEM fitting.

  2. Carefully pull out the plastic fitting and remove the old O-ring from the engine block.

  3. Clean the engine outlet thoroughly.

  4. Lubricate the new O-ring, insert the aluminum fitting, and bolt it down securely.

  5. Reattach the coolant hose and secure with the included stainless steel clamp