Bosch Oxygen Sensor 13477 for BMW & Range Rover — Direct-Fit OE Connector, Fast‑Heating

The Bosch 13477 is a premium original-equipment oxygen sensor engineered to restore accurate exhaust oxygen readings and reliable fuel management on compatible BMW and Range Rover engines.

Built on Bosch's decades-long experience—dating back to their invention of the oxygen sensor—this direct-fit replacement delivers a tested stainless-steel construction, quick-heating electronics, and OE-style connectors so your vehicle's air-fuel management can operate as intended. Each unit undergoes full functionality testing and arrives with threads pre-coated in anti-seize for straightforward installation.

How does the Bosch 13477 improve engine sensing and fuel control?

The 13477 measures exhaust oxygen concentration precisely and feeds that information to the engine control unit to help maintain the correct air-fuel ratio. Faster, accurate readings reduce the time the system runs in open-loop and help the ECU adjust fueling more quickly after start-up.

• Fast-acting heater gets the sensor to operating temperature in seconds for earlier closed-loop operation.
• Sealed double laser-welded stainless-steel body resists exhaust contaminants for steady performance.
• Factory-tested unit ensures a known functional baseline before installation.

Is this a direct replacement and how easy is installation?

Yes — the Bosch 13477 is made as a true direct-fit sensor with original-equipment-style connectors and harnesses for compatible models. Installation is simplified by pre-coated anti-seize threads and plug-and-play electrical connections, eliminating the need for splice work or aftermarket adaptors.

• True OE connector and harness match factory pinouts for straightforward swapping.
• Threads come pre-coated with anti-seize—no separate compound required.
• Designed for Planar and 3-, 4-, and 5-wire thimble-type applications where specified.

Which vehicles and engine positions fit the Bosch 13477?

This sensor is compatible with a range of BMW model years and some Land Rover/Range Rover applications; fitment depends on model year, engine type, and sensor position. Always verify the specific fitment with your vehicle’s parts lookup or fitment checker before ordering to ensure correct location and wiring.

• Covers many BMW models including 3-, 5-, 7- and 8-series, M5, X3, X5, Z3, Z4, and Z8 across late 1990s–2000s model years.
• Also listed for select 2003–05 Range Rover applications; check engine code and sensor position first.
• Compatibility can vary by engine variant—verify part number and position when selecting.

What construction and testing features extend sensor life?

Bosch combines robust materials and rigorous testing to deliver long-term stability in exhaust environments. A double laser-welded stainless-steel housing, full submersible sealing, and factory functional testing reduce early failures from contaminants and thermal stress.

• Double laser-welded stainless-steel body for improved corrosion and impact resistance.
• Sealed, submersible construction protects internal elements from exhaust byproducts.
• Each sensor is 100% function-tested, producing a seared protection-tube appearance that signals quality verification.

Who is this for: The Bosch 13477 is ideal for DIY mechanics, independent repair shops, and vehicle owners who need a dependable, OE-style oxygen sensor replacement for compatible BMW and Range Rover models. Choose this part when you want Bosch OE-level testing and materials, simplified installation with pre-coated threads and direct-fit connectors, and a sensor built to withstand harsh exhaust conditions while restoring proper air-fuel feedback to the engine management system.