Bosch 15122 Oxygen Sensor - Downstream, Upstream or Upstream Left

Bosch Actual OE Oxygen Sensor 15122

Bosch 15122 is a specific-fit, narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management across changing engine loads, temperatures, and driving conditions.

Key Features

• Specific-fit Bosch Actual OE Oxygen Sensor for direct application matching
• Narrow-band heated oxygen sensor with 4-wire configuration
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Rectangle female connector with pin terminals and included wiring harness
• Metal housing and high-temperature-resistant construction for demanding exhaust environments
• Wiring harness length: 15.9 in; overall length: 19.3 in

Product Details

Built on Bosch OE development experience, this oxygen sensor uses advanced ceramic elements and optimized heater control to deliver fast light-off and accurate lambda feedback once the engine enters closed-loop operation. Bosch 15122 is an OE-style replacement for vehicles that require a narrow-band heated sensor, including Jeep Wrangler, Chrysler Pacifica, Chrysler Town & Country, Dodge Caliber, Dodge Grand Caravan, and Dodge Caravan applications listed below. This part cross-references Mopar 56029085AA for the same application.

Vehicle Fitment

• Fits 2007-2009 Jeep Wrangler, Upstream Left
• Fits 2005-2008 Chrysler Pacifica, Upstream
• Fits 2006-2008 Chrysler Town & Country, Upstream
• Fits 2008 Dodge Caliber, Downstream
• Fits 2005-2008 Dodge Grand Caravan, Upstream
• Fits 2005-2007 Dodge Caravan, Upstream
• Fits 2005 Chrysler Town & Country, Upstream, with under hood emissions decal 04721343AA; with Option Code # XZZ
• Fits 2005 Chrysler Town & Country, Upstream, with under hood emissions decal 04721344AA; with Option Code # XZZ
• Fits 2005 Dodge Caravan, Upstream, with under hood emissions decal 04721343AA; with Option Code # XZZ
• Fits 2005 Dodge Grand Caravan, Upstream, with under hood emissions decal 04721343AA; with Option Code # XZZ
• Fits 2005 Dodge Grand Caravan, Upstream, with under hood emissions decal 04721344AA; with Option Code # XZZ

Common Repair Uses

• Restores oxygen sensor signal accuracy after sensor aging or contamination
• Addresses check engine light concerns tied to O2 sensor response or circuit faults
• Helps correct rich or lean fuel trim readings caused by slow sensor switching
• Supports emissions compliance when the original sensor is no longer reading properly
• Replaces a damaged connector, harness, or heat-affected sensor body

Installation Notes and Tips

Confirm the sensor position before ordering, since Bosch 15122 is listed for upstream left, upstream, and downstream locations depending on vehicle application. Verify the 4-wire connector shape, thread size, and harness length against the original part before installation. Use proper exhaust sensor removal tools and inspect the exhaust bung threads for damage or corrosion before threading in the replacement.

Quality Assurance

Bosch supplies this Actual OE Oxygen Sensor with OE-proven design principles developed over decades of oxygen sensor engineering. The narrow-band heated design, ceramic sensing element, and durable materials are selected to maintain consistent signal quality in high-heat, high-vibration exhaust environments.