Bosch Rear Downstream Oxygen Sensor for Porsche 986 Boxster (1997-1999)

This Bosch Rear Downstream oxygen sensor is a direct-fit replacement for Porsche 986 Boxster applications listed in the fitment table below. Bosch has been a global leader in automotive technology since 1886, pioneering innovations like electronic fuel injection and oxygen (lambda) sensors that shaped modern engine management. Today, Bosch supplies OEM-quality sensors, engine electronics, ignition components, and braking parts found in vehicles worldwide. Known for precision engineering and reliable performance, Bosch parts are built to factory specifications for dependable fitment and long-term durability. The downstream sensor monitors exhaust gas after the catalyst and sends a clean signal back to the DME for emissions tracking and fault diagnosis.

Technical Details

• Manufacturer part number: 13806
• Position: Rear / downstream
• Direct-fit heated oxygen sensor with OE connector
• OE reference commonly listed as: 986 606 126 01
• Thread-in exhaust sensor for post-catalyst monitoring
• Replace failed sensors when fault codes or slow response readings point to the sensor itself

Fitment & Compatibility

Use the fitment table below to confirm year and model coverage for your Boxster. Oxygen sensor locations matter, so verify that you are ordering the rear downstream sensor and not the front pre-catalyst sensor.

If you want us to confirm the sensor location before you order, send us your VIN or the fault-code details. We have been confirming Porsche fitment and drivability parts for more than 20 years, and sensor position is one of the first things we check.