Bosch 16848 Oxygen Sensor - Downstream Left

Bosch Actual OE Oxygen Sensor for Transit

Bosch 16848 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for select 2015 Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD applications in the downstream left position.

For buyers searching for a 2015 Ford Transit-150 downstream left oxygen sensor, 2015 Ford Transit-250 downstream left O2 sensor, or 2015 Ford Transit-350 HD downstream left replacement, Bosch 16848 provides OE-style fitment and sensor control characteristics. The Bosch Actual OE Oxygen Sensor line reflects Bosch’s long OE development history, including narrowband designs that improve closed-loop response and lambda measurement accuracy.

Key Features

• Specific-fit narrow-band heated oxygen sensor
• Designed for downstream left placement
• 4-wire configuration with square female connector
• Threaded mounting with 18 mm thread diameter
• 22 mm hex size for service removal
• Wiring harness included for direct replacement use
• Metal housing with high-temperature-resistant construction
• Bosch part number 16848 for catalog matching

Product Details

Bosch 16848 uses a switching-type narrow-band design to send accurate exhaust oxygen feedback to the engine control unit. That signal helps the ECU maintain stable combustion control across changing load and temperature conditions. The heated sensor design supports faster closed-loop operation after startup, while the ceramic sensing element and controlled heater response help maintain consistent output under thermal and vibration stress. This Bosch oxygen sensor is a direct replacement choice for 2015 Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD models listed with downstream left fitment. If you are cross-shopping Bosch 16848, this part cross-references CK4Z9G444B for the same application.

What It Helps Address

• Fault codes related to oxygen sensor performance
• Unstable air-fuel ratio feedback to the ECU
• Delayed closed-loop operation after startup
• Exhaust emissions control concerns
• Rough combustion control caused by a worn downstream sensor

Installation Notes

Verify the downstream left location before ordering and match the connector shape, wire count, and thread size to the original sensor. The threaded 18 mm design and 22 mm hex size support standard oxygen sensor service procedures. Confirm harness routing and connector orientation on the vehicle before installation to avoid strain on the lead.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this Actual OE Oxygen Sensor line. Bosch 16848 is built to OE-proven standards for accurate signal delivery, durable heater control, and consistent operation in demanding exhaust environments.