BMW E61 Touring Rear Air Spring Bilstein B3 40-288871

Bilstein B3 rear air spring for E61 Touring (2004-2010) - not a 'replacement', not 'OEM-spec', just a tougher, more resilient air bellow built for fast road use and track-day reliability. Fits models with separate shock + air spring setups (not integrated units).

• E61-specific: engineered for the rear axle geometry and load profile of the E61 Touring - no fitment guesswork on F10 or G30 swaps
• Stage 1 & fast road ready: higher-cycle rubber compound and reinforced piston seal vs. stock - handles repeated height adjustment and spirited driving better than OE
• Decat or track-day compatible: no self-levelling coding required; works cleanly with lowered static ride heights when paired with appropriate compressor tuning
• Covers all E61 Touring engines: N52, N54, N55, M54, M57, M67 - including xDrive and non-xDrive
• Part number 40-288871 - matches Bilstein’s own B3 air spring spec, not a rebadged generic

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