BMW N54 Bank 2 front O2 sensor 1200mm - 11787558087

Direct-fit upstream lambda sensor for N54 Bank 2 (cylinders 4-6). Uses the exact OEM part number 11787558087 - no reprogramming, no trimming, no guesswork.

Plug-and-play on E82 135i, E89 Z4 sDrive35i, E90/E91/E92/E93 335i and E82 1M. The 1200mm harness routes cleanly without modification.

• Correct for closed-loop fuel control - vital for stage 1 or fast-road N54 tuning
• Fixes P0171, P0174, rough idle or hesitation when Bank 2 sensor drifts
• Not a generic copy: built by BMW, calibrated for N54 combustion dynamics