Bilstein 36-161409 Coil Spring - Rear

Bilstein B3 OE Replacement Rear Coil Spring

The Bilstein B3 OE Replacement coil spring restores factory-style suspension height, spring rate, and ride control for select BMW rear applications. Built to OE dimensions and design type, this spring is a direct replacement for worn or sagging original equipment on the BMW 528i, 535i, 550i, 525i, 530i, and 545i.

Key Features

• Bilstein B3 OE Replacement series for factory-spec suspension restoration
• Rear coil spring for standard suspension applications
• Manufactured to OE dimensions, spring rates, and design type
• Black powder coat finish for corrosion resistance
• Direct-fit replacement for select BMW rear suspension setups
• Part number 36-161409 for application matching and catalog lookup

Product Details

Bilstein B3 OE Replacement springs are engineered to match the original spring geometry and rate used on the vehicle, helping restore the suspension system to factory specifications. This rear coil spring is listed for 2004-2007 BMW 525i and 530i, 2004-2005 BMW 545i, 2006-2010 BMW 550i, and 2008-2010 BMW 528i and 535i. The 36-161409 spring is intended for standard suspension vehicles, with heavy-duty version notes where specified in the fitment data.

This part cross-references AMS Automotive 6307 for the same application.

What It Helps Address

• Sagging rear ride height
• Uneven stance from worn original springs
• Loss of factory spring rate and support
• Noisy or unstable rear suspension behavior from fatigued springs
• Restoration of OE suspension geometry after spring replacement

Installation Notes

Fits 2008-2010 BMW 528i, rear, heavy duty version for standard suspension only; B3 OE Replacement. Fits 2008-2010 BMW 535i, rear, standard suspension only; B3 OE Replacement. Fits 2006-2010 BMW 550i, rear, standard suspension only; B3 OE Replacement. Fits 2004-2007 BMW 525i, rear, heavy duty version for standard suspension only; B3 OE Replacement. Fits 2004-2007 BMW 530i, rear, heavy duty version for standard suspension only; B3 OE Replacement. Fits 2004-2005 BMW 545i, rear, standard suspension only; B3 OE Replacement.

Verify the vehicle’s suspension type before ordering, since fitment is limited to standard suspension configurations noted above. Replace springs in matched pairs when service procedures call for it, and confirm rear axle-side application before installation.

Quality Assurance

Bilstein B3 OE Replacement components are built to meet OE dimensions, spring rates, and design types so the replacement part aligns with factory suspension requirements.