Bosch 17238 Premium OE Replacement Oxygen Sensor

The Bosch 17238 is a Premium Original Equipment replacement oxygen sensor (O2 sensor) engineered to deliver factory-level performance and precision. Built on the same technology Bosch has refined since inventing the automotive oxygen sensor in the late 1960s, this direct-fit sensor restores proper air-fuel mixture monitoring to help maintain engine efficiency and reduce harmful exhaust emissions.

The vehicle's engine control unit (ECU) relies on the O2 sensor to continuously monitor exhaust oxygen content and regulate the air-fuel ratio. A faulty or sluggish oxygen sensor can result in reduced fuel economy, increased emissions, rough running, and even premature catalytic converter failure — making timely replacement critical.

Key Features:

• Factory Tested: Every sensor undergoes 100% full functional quality testing before leaving the factory, ensuring it meets Bosch's rigorous performance standards
• Double Laser-Welded Stainless Steel Body: Exclusively engineered body is fully submersible and sealed tight against exhaust damage for extended service life
• Fast-Acting Heater: Optimizes sensor operation on Planar and 3, 4, and 5-wire Thimble-type sensors, reaching operating temperature within seconds for immediate performance
• Ready to Install: True direct-fit OE connectors and harnesses included; threads pre-coated with anti-seize compound for straightforward installation
• OE Cross-Reference: Replaces OEM part numbers 68171190AA and 68171190AB

As the original inventor of the automotive oxygen sensor and the world's leading O2 sensor manufacturer, Bosch brings unmatched expertise to every sensor it produces. The Bosch 17238 is the trusted OE-quality solution for restoring proper engine management and emissions control.