Sealing Ring 13 71 8 596 850

Ensure reliable, leak-proof operation of your BMW’s fluid systems with the genuine sealing ring (part 13 71 8 596 850). Engineered to exact factory tolerances, this high-precision seal maintains consistent compression between mating surfaces to prevent oil, coolant or hydraulic fluid seepage.

Key Benefits

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

• Dual-Material Construction
  Combines a corrosion-resistant steel core with a bonded nitrile rubber sealing lip to maintain uniform contact pressure and resilience.

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

• Thermal & Chemical Resistance
  Elastomer formulation withstands temperatures from –40 °C to +150 °C and resists degradation from engine oil, coolant and hydraulic fluids.

• Versatile Application
  Ideal for sealing oil pan drips, thermostat housings, transmission casings and other critical joints requiring a robust seal.

Technical Specifications

• Part Number: 13 71 8 596 850

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

• Inner Diameter: 28 mm

• Outer Diameter: 34 mm

• Thickness: 2 mm cross-section

• Temperature Range: –40 °C … +150 °C

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

Installation Overview

1. Clean Mating Faces: Remove old seal and debris; ensure surfaces are dry and free of oil.

2. Place Sealing Ring: Center the ring on the male flange or bore.

3. Align & Torque: Mate components and tighten bolts in a crisscross pattern to BMW’s specified torque to evenly compress the seal.

4. Inspect for Leaks: After system pressurization, check for any signs of seepage or seepage under load.