Bosch 13427 Oxygen Sensor - Upstream

Bosch Actual OE Oxygen Sensor 13427

Bosch 13427 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and lower emissions, making it a direct-fit choice for select Mercedes-Benz applications, including Mercedes-Benz C280, C36 AMG, S320, and 300SE upstream positions.

Key Features

• Actual OE Oxygen Sensor from Bosch’s OE-focused product line
• Narrow-band heated oxygen sensor for closed-loop fuel control
• Specific-fit design with threaded mounting
• 4-wire configuration with round connector and included wiring harness
• 22 mm hex size and 18 mm thread diameter
• Metal housing with high-temperature-resistant construction
• 23.3 in wiring harness length and 27 in overall length

Product Details

Bosch 13427 uses advanced ceramic sensing elements and optimized heater control to deliver fast light-off and accurate lambda feedback across changing engine temperatures and load conditions. As part of Bosch’s Actual OE Oxygen Sensor line, this sensor reflects more than five decades of OE development and is engineered for consistent operation in harsh thermal and vibration environments. This part cross-references Bosch-style OE applications such as 0258003427CP8 for the same application.

Compatible With select Mercedes-Benz models: Fits 1996 Mercedes-Benz C280, Upstream; Fits 1996 Mercedes-Benz C36 AMG, Upstream; Fits 1994-1995 Mercedes-Benz C280, Upstream; Fits 1995 Mercedes-Benz C36 AMG, Upstream; Fits 1994 Mercedes-Benz S320, Upstream; Fits 1992-1993 Mercedes-Benz 300SE, Upstream. Bosch 13427 is a strong match for drivers searching for a Mercedes-Benz C280 upstream oxygen sensor, Mercedes-Benz S320 upstream O2 sensor, or Mercedes-Benz 300SE narrow-band heated oxygen sensor replacement.

Common Issues This Sensor Can Address

• Faulty oxygen sensor readings that trigger check engine lights
• Unstable air-fuel mixture control during closed-loop operation
• Increased exhaust emissions from inaccurate lambda feedback
• Slow sensor response that affects fuel trim correction
• Rough combustion control caused by a worn upstream O2 sensor

Installation Notes

Install Bosch 13427 in the upstream threaded location specified by the vehicle application. Verify connector shape, wire count, thread diameter, and harness length before installation. Use proper oxygen sensor service tools and confirm the exhaust threads are clean and undamaged before tightening the sensor to specification.

Quality Assurance

Bosch supplies this Actual OE Oxygen Sensor as a standard replacement part built to OE-level design and material standards. The sensor is backed by Bosch’s long history of oxygen sensor development and aftermarket OE-proven engineering.