Sealing Ring 64 50 8 390 601

Maintain leak-free operation in your BMW’s fluid circuits with the genuine sealing ring (part 64 50 8 390 601). Engineered to exact factory tolerances, this high-precision seal reliably prevents oil, coolant or hydraulic fluid seepage under all operating conditions.

Key Benefits

• Exact OEM Fit
  Manufactured to BMW’s CAD specifications for seamless, drop-in replacement—no trimming or adapters required.

• Dual-Material Construction
  Features a corrosion-resistant steel core bonded to a high-performance nitrile rubber sealing lip for uniform compression.

• Leak-Proof Performance
  Precision-pressed profile delivers even contact pressure around the entire circumference, safeguarding against fluid crossover.

• Wide Chemical & Temperature Resistance
  Elastomer compound withstands temperatures from –40 °C to +150 °C and resists engine oil, coolant and brake fluid.

• Versatile Application
  Ideal for sealing oil pans, thermostat housings, transmission casings and other critical junctions.

Technical Specifications

• Part Number: 64 50 8 390 601

• Material: Stainless-steel ring with bonded NBR rubber seal

• Inner Diameter: 32 mm

• Outer Diameter: 38 mm

• Cross-Section Thickness: 2.5 mm

• Temperature Range: –40 °C … +150 °C

• Compatibility: Fits BMW models specifying this part; verify via VIN or existing seal

Installation Overview

1. Clean Mating Surfaces: Remove old sealant and debris; ensure surfaces are dry and oil-free.

2. Position Seal: Center the sealing ring on the male flange or bore.

3. Align & Torque: Mate components and tighten fasteners in a crisscross pattern to BMW’s specified torque for even compression.

4. Inspect for Leaks: After system pressurization, check all joints for signs of seepage.