Bosch Rear Downstream Oxygen Sensor for Porsche 993/996 (1996-1999)

This Bosch Rear Downstream oxygen sensor is a direct-fit replacement for Porsche 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 catalyst output and gives the DME the feedback it needs for emissions-system checks and fault tracking.

Technical Details

• Manufacturer part number: 13723
• Position: Rear / downstream
• Direct-fit heated oxygen sensor with OE connector
• Post-catalyst sensor for catalyst-efficiency monitoring
• Thread-in exhaust sensor for listed Porsche applications
• Verify sensor location before ordering on cars with multiple O2 sensors

Fitment & Compatibility

Use the fitment table below to confirm the exact year and model before ordering. Sensor location matters, and downstream sensors should be matched by position, connector, and part number.

If you want us to confirm the correct sensor before you order, send us your VIN or fault-code details. We have been handling Porsche fitment and drivability questions for more than 20 years.