Bosch 15737 Oxygen Sensor - Upstream

Bosch Universal Oxygen Sensor 15737

Bosch Universal Oxygen Sensor 15737 is a narrow-band heated O2 sensor built for direct signal feedback in emission control systems. It uses an OE-specification zirconia ceramic sensing element and heater design, with a SmartLink Posi-Lock connector system for universal installation across a wide range of vehicles.

For drivers and technicians servicing older import applications, this Bosch oxygen sensor 15737 provides a practical replacement option for upstream sensor locations on select Mercedes-Benz 190E, 300E, 300CE, 300TE, 300SE, 300SEL, and Volvo 240, 740, 760, 780, 940, and 960 models.

Key Features

• Universal narrow-band heated oxygen sensor for emission control service
• OE-style zirconia ceramic sensing element and heater design
• SmartLink Posi-Lock connector system for secure electrical connection
• No soldering, crimping, or specialty tools required for connector adaptation
• Extended lead length for vehicles with damaged or shortened wiring
• Reopenable connector design for adjustments during installation
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included

Product Details

Bosch Universal Oxygen Sensor 15737 is engineered as a standard replacement sensor with a 3-wire heated design, rectangular connector shape, and male/female connector configuration. The SmartLink universal connector system is designed to create a secure, weather-resistant electrical connection while simplifying adaptation to existing harnesses. Bosch uses the same core sensor and heater architecture found in OE applications, helping maintain accurate air-fuel-ratio feedback for engine management systems.

This part number is commonly searched for fitment on upstream applications such as 1990-1992 Mercedes-Benz 300E, 1990-1992 Mercedes-Benz 300CE, 1990-1993 Mercedes-Benz 300SL, and 1990-1993 Volvo 240 and 940 models. Bosch 15737 is also listed for 1987-1990 Volvo 760 and 780, plus 1989-1992 Volvo 740 without Regina Fuel Injection System.

What It Helps Address

• Check engine light caused by slow or inaccurate oxygen sensor response
• Rich or lean fuel mixture concerns related to faulty O2 feedback
• Hard starting, rough idle, or drivability issues tied to sensor degradation
• Corroded, damaged, or shortened factory sensor wiring
• Service needs on upstream oxygen sensor locations in older Mercedes-Benz and Volvo applications

Installation Notes

Verify thread size, connector style, wire count, and upstream position before installation. Bosch 15737 uses a threaded mount with an 18 mm thread diameter and 22 mm hex size. The universal SmartLink connector is intended to be adapted to the existing harness, and the extended lead length provides added routing flexibility where factory wiring has been repaired or shortened.

Fitment includes 1991-1993 Mercedes-Benz 190E upstream, 1990-1992 Mercedes-Benz 300E upstream, 1990-1992 Mercedes-Benz 300TE upstream, 1990-1993 Volvo 240 upstream, 1989-1992 Volvo 740 upstream without Regina Fuel Injection System, and 1992-1994 Volvo 960 upstream. Confirm the vehicle’s original sensor configuration before ordering.

Quality Assurance

Bosch builds this universal oxygen sensor using OE-level sensor and heater construction for dependable signal accuracy and consistent operation. The SmartLink Posi-Lock connector system is designed for secure, high-temperature, weather-resistant connections and can be reopened if adjustments are needed during service.