J.C. Whitney JV960903 Downstream Heated Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JV960903 is a direct-fit, OEM-replacement downstream oxygen sensor (O2 sensor) designed for the Volvo S40 and V40. This heated, 4-wire narrowband sensor monitors exhaust gases after the catalytic converter, providing critical feedback to the engine control unit (ECU) to help maintain optimal fuel trim, emissions compliance, and fuel economy.

Key Features:

• Sensor Type: Heated, narrowband oxygen sensor (O2 sensor)
• Wire Configuration: 4-wire
• Position: Downstream / after catalytic converter (Bank 1, Sensor 2)
• Mounting Style: Threaded-in with 7/8 in. (22mm) hex size
• Thread Size: M18 x 1.5
• Wire Length: Approximately 38 in.
• Connector: Male connector, direct plug-in fit
• Product Fit: Direct fit — no splicing or modification required
• Quantity Sold: Sold individually

Cross-Reference / OEM Part Numbers: 30617336, 234-4862, 250-24428

Replacing a worn or failed downstream O2 sensor can resolve check engine lights related to catalyst monitor codes and help restore proper emissions system performance. This sensor installs using standard oxygen sensor tools and requires no special calibration.