Bosch 18225 Oxygen Sensor

Bosch OE Quality Oxygen Sensor for Chrysler, Dodge, Jeep, and Ram

Bosch Part Number 18225 is a specific-fit narrow-band heated oxygen sensor built for Chrysler, Dodge, Jeep, and Ram applications that call for precise air-fuel ratio feedback. It supports stable closed-loop fuel control and emissions monitoring across changing engine temperatures and operating conditions.

Key Features

• Bosch OE Quality Oxygen Sensor line with OE-proven sensor design
• Narrow-band heated oxygen sensor for faster light-off and quicker closed-loop operation
• Specific-fit replacement with 4-wire, female connector, oblong plug, and threaded mounting
• 18 mm thread diameter with 22 mm hex size for service access
• Metal housing and high-temperature-resistant construction for harsh underbody conditions
• Wiring harness length of 7.6 and overall length of 11 for application-specific routing

Product Details

Bosch 18225 uses a switching-type oxygen sensing element to report exhaust oxygen content to the ECU, helping the engine manage fuel delivery with consistent lambda control. Bosch’s OE Quality Oxygen Sensor line builds on decades of original equipment development, including planar narrowband technology that improves response time and measurement accuracy. This part cross-references Mopar 68224424AA for the same application. It is a direct replacement choice for vehicles such as the Jeep Grand Cherokee, Jeep Grand Cherokee L, Jeep Wrangler, Ram 1500, Ram ProMaster 1500, Ram ProMaster 2500, Ram ProMaster 3500, Chrysler 300, Dodge Challenger, Dodge Charger, Jeep Cherokee, and Jeep Wagoneer where the listed position matches.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Slow sensor response during closed-loop operation
• Emissions test failures tied to sensor degradation
• Rough combustion control caused by aging upstream or downstream sensor readings

Installation Notes and Tips

Verify the exact position before ordering, since this Bosch 18225 application list includes upstream, downstream, upstream left, upstream right, and downstream left locations. Confirm the 18 mm thread size, 22 mm hex, 4-wire connector style, and harness routing against the original sensor before installation. Use proper oxygen sensor service tools and inspect the exhaust bung threads and connector condition during replacement.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this OE Quality Oxygen Sensor line. The sensor uses advanced ceramic elements, controlled heater operation, and heat-resistant materials to maintain consistent signal quality under thermal and vibration load.