Bilstein XR851787 B4 OE Replacement Front Monotube Shock Absorber

The Bilstein XR851787 is a B4 Series OE Replacement front shock absorber engineered to restore factory ride quality and handling precision. This genuine Bilstein unit features a monotube gas-pressure design — the same technology Bilstein pioneered for original equipment manufacturers over six decades ago — delivering consistent damping performance and long-term durability.

The B4 Series is Bilstein's benchmark for OE-quality replacement dampers, built to meet or exceed the original manufacturer's specifications. The monotube construction provides superior heat dissipation compared to conventional twin-tube designs, ensuring fade-free performance under varied driving conditions. The unit is supplied as a spring-bearing shock absorber and includes a spring seat.

Key Features:

• Bilstein B4 OE Replacement Series — factory-correct fit and performance
• Monotube gas-pressure design — responsive, consistent damping
• Front axle installation position
• Spring seat included — complete drop-in replacement
• Finish: Green paint (Bilstein OE standard)
• Lower mount type: Clevis; Upper mount type: Stem
• Not recommended for use with lowering springs
• Limited lifetime warranty against manufacturer defects

OEM & Cross-Reference Part Numbers: XR851787, XR843733, XR836411, XR8 51787, XR8 43733, XR8 36411, 2R8318045FB, 2R8318045FC, BE3-6744, F4-BE3-6744-H0

Bilstein Part Number: 24-067447