Also BMW # 11781405324. Located in the front position of the exhaust manifold for cylinders 4-6 on the S54 engine
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Also BMW # 11781406622. Located in the rear position of the exhaust manifold for cylinders 4-6 on the S54 engine
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Brand:
ES#:
11026
Mfg#:
13951
Ships in 4 Business Days
$208.90
This product was last offered at the strikethrough price on 05-19-2026
Also BMW # 11781406621. Located in the rear position of the exhaust manifold for cylinders 1-3 on the S54 engine
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Brand:
ES#:
11025
Mfg#:
15138
Ships in 1-2 days
$145.27
This product was last offered at the strikethrough price on 07-31-2026
A common source of check engine lights is a failed or failing oxygen sensor. When the O2 sensor can't register oxygen content before and after your catalytic converter, it doesn't know what to do with the fuel mixture and will default to run rich. Replace old failing oxygen sensors with OEM O2 sensors or quality aftermarket O2 sensors if you're looking to save a few bucks.
Lifetime Replacement
