Bilstein 31-31-6-786-517 B6 Performance Front Left Suspension Strut Assembly

The Bilstein 31-31-6-786-517 is a B6 Performance front left suspension strut engineered as a direct-fit upgrade for BMW xDrive models. Built around Bilstein's signature 36mm monotube gas-pressure design, this strut delivers consistent, fade-free damping performance that outperforms conventional twin-tube OE units.

The B6 series is purpose-built for drivers who want improved handling dynamics and stability while retaining factory ride height and comfort. Calibrated valving matched to the specific vehicle application ensures precise damping response in both everyday commuting and spirited driving conditions.

Key Features:

• Monotube gas-pressure design for consistent, fade-free damping performance
• B6 Performance series — a true step up in handling over OEM without lowering the vehicle
• Yellow powder-coat finish for corrosion resistance and easy identification
• Blue bellows boot included to protect the piston rod from road contamination
• Fixed spring seat included — compatible with OEM coil springs
• Stem upper mount type with bracket lower mount for direct OEM fitment
• Engineered and manufactured to meet or exceed OEM quality standards

OEM Cross-Reference Part Numbers: 31316786517, 31 31 6 786 517, 31316786519, 31306772219, 31306772221

Bilstein Part Number Cross-Reference: 35-141761

Bilstein B6 Performance struts are the go-to suspension upgrade for BMW owners seeking improved road feedback and cornering stability without compromising daily drivability. Not recommended for use with aftermarket lowering springs.