Upstream O2 Oxygen Sensor For BMW E38 E39 E46 323i 325i 328i 525i Z4 X3 X5 (4-Wire)
About this item
Got a check engine light on your BMW or Land Rover?
It might be a bad oxygen sensor.
This upstream O2 sensor fits a huge range of models, including the E46 323i/325i/328i, E39 525i/528i, E38 740i, Z3, Z4, X3, X5, and even the Range Rover.
It's a 4-wire, narrowband, heated sensor with a thread diameter of M18.
It replaces part numbers 11781742050 and 0258003477.
It's built with a zirconia element and a 310 stainless steel protective sleeve for durability and heat resistance.
It also features double sealing technology (seal gaskets and rubber plugs) to keep contaminants out.
Installation is straightforward—just unplug the old one, unscrew it, and screw this one in.
Clear that code and get your fuel trims back to normal.
It's a direct fit, comes with a wiring harness, and has a 1-year warranty.
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