Suplex Rear Coil Spring for BMW 3 Series

The Suplex 06386 is a rear coil spring built for BMW 3 Series applications with factory standard suspension. It uses a constant wire diameter design and measures 343 mm in length with a 91 mm outer diameter, 12.75 mm thickness, and 2.2 weight rating for a direct suspension replacement.

SUPLEX is the product line name used by Suplex for suspension components, including coil springs engineered for vehicle-specific fitment. This rear spring is listed for BMW 328d, 328i, 335i, 335i xDrive, and 320i xDrive applications with factory standard suspension.

• Part number: 06386
• Rear coil spring for factory standard suspension applications
• Constant wire diameter spring design
• Length: 343 mm
• Outer diameter: 91 mm
• Thickness: 12.75 mm
• Weight: 2.2
• Fits BMW 328d rear, 2014-2015
• Fits BMW 328i rear, 2012-2015
• Fits BMW 335i rear, 2012-2015
• Fits BMW 335i xDrive rear, 2013-2015
• Fits BMW 320i xDrive rear, 2013-2014
• Fits BMW 320i xDrive front, 2015

Vehicle Fitment Details

Compatible with BMW 3 Series models listed for factory standard suspension only. This includes rear fitment for the BMW 328d, BMW 328i, BMW 335i, BMW 335i xDrive, and BMW 320i xDrive, plus front fitment for the 2015 BMW 320i xDrive as specified in the catalog data. The Suplex 06386 is a fitment-based replacement for BMW 3 Series suspension service where the original rear coil spring has worn, sagged, or lost ride height.

Common Suspension Issues Addressed

• Rear ride height loss from a fatigued coil spring
• Uneven stance on BMW 328i, 335i, or 328d models
• Noise or harshness caused by a weakened spring
• Restoration of factory suspension geometry after spring replacement
• Correction of spring sag on high-mileage BMW 3 Series vehicles

Installation Notes and Tips

Verify the vehicle has factory standard suspension before ordering. Match the position exactly to the catalog listing, since this part is shown for rear applications and also for the 2015 BMW 320i xDrive front position. Compare the original spring dimensions and suspension code during service to confirm proper selection. Part number 06386 should be checked against the removed spring before installation.

Quality Assurance

Suplex suspension springs are cataloged as application-specific replacement parts for BMW 3 Series fitment. The SUPLEX line focuses on suspension components built to match listed vehicle requirements, and part number 06386 is identified for direct replacement use in the specified BMW 328i, 335i, 328d, and 320i xDrive applications.