Bosch 15755 Oxygen Sensor - Upstream

Bosch Validated Oxygen Sensor 15755

Bosch Validated Oxygen Sensor 15755 is a narrow-band heated upstream O2 sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for select Ford, Lincoln, Mazda, and Mercury applications, including 2007-2010 Ford Edge and 2007-2010 Lincoln MKX.

Key Features

• Specific-fit Bosch oxygen sensor for upstream placement
• Narrow-band heated design for closed-loop fuel control
• Round male connector with 4 terminals and 4-wire harness
• Threaded mounting with 18 mm thread size and 22 mm hex
• Metal housing with high-temperature-resistant construction
• Wiring harness included; harness length 8.6 in
• Overall length 12 in; sealing surface to connector end 10.8 in

Product Details

Bosch 15755 uses a switching-type sensing element to report oxygen content in the exhaust stream so the engine control unit can maintain stable combustion and emissions control. Bosch’s validated oxygen sensor line builds on decades of OE development, including planar narrowband sensor technology that improves light-off response and closed-loop operation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 2007-2010 Ford Edge, Upstream
• Fits 2007-2010 Lincoln MKX, Upstream
• Fits 2007-2010 Lincoln MKZ, Upstream
• Fits 2007-2010 Mazda CX-9, Upstream
• Fits 2008-2009 Ford Taurus, Upstream, without California Emission System
• Fits 2008-2009 Ford Taurus X, Upstream, without California Emission System
• Fits 2008-2009 Mercury Sable, Upstream, without California Emission System

Common Repair Uses

• Restores upstream oxygen sensor signal accuracy
• Addresses check engine light concerns related to O2 sensor performance
• Helps correct rich or lean fuel trim readings
• Supports smoother closed-loop fuel control after sensor aging
• Replaces a worn sensor exposed to heat and vibration

Installation Notes

Confirm upstream sensor location, connector style, and thread size before installation. Use the vehicle’s existing harness routing and verify the round 4-pin connector matches the original sensor. For 2008-2009 Ford Taurus, 2008-2009 Ford Taurus X, and 2008-2009 Mercury Sable, verify the vehicle is without California Emission System before ordering. Clear diagnostic trouble codes after installation and verify fuel trim and sensor switching behavior during a road test.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE sensor development and aftermarket application coverage. The design uses ceramic sensing elements, controlled heating, and durable materials selected for high-temperature exhaust environments.