Bosch 17422 Oxygen Sensor - Upstream Left

Bosch Wideband O2 Sensor for Transit

Bosch 17422 is an Actual OE wideband oxygen sensor built for precise air-fuel ratio monitoring in modern engine management systems. It delivers fast response, heated operation, and specific-fit installation for select Ford Transit vans.

Key Features

• Wideband A/F oxygen sensor for continuous lambda-range measurement
• Specific fit with 5-wire harness and oblong male connector
• Heated sensor design for quicker light-off and stable operation
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing and ceramic sensor construction for OE-style durability
• Wiring harness included with 22.1 in harness length

Product Details

Bosch 17422 is part of the Bosch Actual OE Oxygen Sensor line, a product line focused on OE-level sensor performance for modern emissions systems. This wideband sensor provides detailed air-fuel ratio feedback to the ECU, helping maintain accurate mixture control across changing load and temperature conditions. It is a direct-fit replacement for select Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD applications, including the upstream left position. This part cross-references Ford CK4Z9F472A for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough running caused by delayed sensor response
• Reduced fuel economy from inaccurate ECU feedback
• Emissions test failures tied to sensor degradation

Installation Notes

Fits 2015-2019 Ford Transit-150, upstream left. Fits 2015-2019 Ford Transit-250, upstream left. Fits 2015-2019 Ford Transit-350, upstream left. Fits 2015-2019 Ford Transit-350 HD, upstream left. Verify connector shape, wire count, and thread size before installation. Use the correct oxygen sensor socket for the 22 mm hex and confirm the threaded mounting surface is clean before tightening.

Quality Assurance

Bosch has more than five decades of OE development in oxygen sensor technology, and this sensor reflects that OE-focused engineering approach. The wideband design, optimized heater control, and robust construction support reliable operation in demanding exhaust conditions.