Bosch 15736 Oxygen Sensor - Downstream or Upstream

Bosch Universal Oxygen Sensor 15736

Bosch Universal Oxygen Sensor 15736 is a narrow-band heated O2 sensor built for direct air-fuel-ratio feedback in a wide range of import applications. It uses Bosch OE-specification zirconia ceramic sensing technology and a heater design matched to original equipment standards, with a universal SmartLink connector system for faster installation.

Key Features

• Universal fit oxygen sensor for threaded mounting applications
• Narrow-band heated sensor design for accurate exhaust feedback
• Bosch zirconia ceramic element and OE-style heater construction
• SmartLink Posi-Lock connector system for secure, weather-resistant electrical connections
• Extended lead length for vehicles with damaged or shortened wiring
• Reopenable connector design for adjustments during installation
• 4-wire harness with included wiring harness
• 18 mm thread size, 22 mm hex size, threaded mounting type

Product Details

Bosch SmartLink Universal Oxygen Sensor 15736 is engineered for technicians who need a universal replacement with OE-level sensor construction. The sensor uses the same core zirconia element and heater design found in Bosch original equipment applications, helping maintain precise oxygen monitoring for engine management systems. The SmartLink Posi-Lock connector system simplifies adaptation to existing harnesses without soldering, crimping, or specialty tools, while the extended lead length adds flexibility on vehicles where the original wiring has been shortened or damaged. This part cross-references Bosch 15736 for the same application.

Compatible With select Mercedes-Benz, BMW, Volkswagen, and Volvo applications, including long-tail searches such as Bosch 15736 oxygen sensor for 1994-1996 Mercedes-Benz S320 upstream and BMW 325i upstream oxygen sensor replacement. It also serves fitments such as 1995 Volkswagen Passat upstream and 1993-1994 Volvo 850 upstream for air pump.

What It Helps Solve

• Check engine light caused by a failing upstream or downstream oxygen sensor
• Rough idle, hesitation, or poor fuel control from inaccurate O2 feedback
• Exhaust sensor wiring damage, shortened leads, or connector mismatch
• Slow sensor response that can affect air-fuel ratio correction
• Service needs on threaded narrow-band heated oxygen sensor locations

Installation Notes and Tips

Verify the vehicle’s sensor position, thread size, and harness routing before installation. The threaded 18 mm sensor body and 22 mm hex size should be matched to the exhaust bung, and the universal connector should be adapted to the existing harness using the SmartLink Posi-Lock system. Because fitment varies by chassis number and emission package on some Mercedes-Benz and Volkswagen applications, confirm the exact upstream or downstream location before ordering.

Quality Assurance

Bosch builds this universal oxygen sensor to OE-specification standards using the same sensor architecture trusted in original equipment applications. The SmartLink connector system is designed for secure, high-temperature, weather-resistant electrical connections for dependable service in emission control repairs.