BMW E70 X5 Rear Coil Spring 36-301102 - Fast Road, Track Day, Daily Driver

Bilstein B3 rear coil spring 36-301102 for BMW E70 X5 (2006-2013). Not a show car trim piece. Not a decat pipe. This is the real deal for drivers who still want their X5 to turn in, hold line, and not wallow after 100k miles - whether you're running stage 1 N54/N55 tuning, daily driving an xDrive 30d, or prepping a 40i for track days.

• Hot-set chrome vanadium steel - no sag, no height loss, no guesswork
• Pigtail ends + central force design - matches OEM geometry, works with stock dampers and ARBs
• Fits all E70 variants: 30i, 35i, 40i, 50i, 30d, 35d, 40d, 3.0sd - including xDrive and sDrive
• Replace in axle pairs for consistent handling - especially if you’re running fast road or track day duties
• No fitment notes, no disclaimers, no ‘consult your mechanic’ - it’s a direct swap for the original rear spring

Search terms this actually answers: E70 rear spring, X5 35d fast road suspension, Bilstein 36-301102, E70 track day coil spring, X5 daily driver rear spring, N55 X5 rear suspension upgrade.