Bosch 13093 Oxygen Sensor - Downstream

Bosch Validated Oxygen Sensor for Acura

Bosch Validated Oxygen Sensor 13093 is a specific-fit, narrow-band heated O2 sensor built for downstream applications on select Acura models. It provides the ECU with accurate air-fuel-ratio feedback to support stable combustion control and lower emissions.

Fits 1996-2004 Acura RL, downstream. Fits 1995-1998 Acura TL, downstream. This Bosch Validated Oxygen Sensor line reflects Bosch’s OE development background and narrowband sensor design for reliable closed-loop operation.

Key Features

• Specific-fit oxygen sensor for downstream placement
• Narrow-band heated sensor type for faster closed-loop response
• Threaded mounting with 18 mm thread diameter
• 4-wire design with blade terminals and rectangular connector
• Wiring harness included with 22 in harness length
• Metal housing with high-temperature-resistant construction
• 22 mm hex size for service removal
• Bosch part number 13093

Detailed Description

Bosch 13093 is a standard replacement oxygen sensor engineered for vehicles that rely on narrow-band downstream feedback to monitor exhaust oxygen content. The sensor uses a heated ceramic element and optimized heater control to reach operating temperature quickly, helping the ECU maintain accurate fuel control across changing load and temperature conditions. Bosch’s validated oxygen sensor line draws on decades of OE sensor development, including planar narrowband technology that improves light-off speed and lambda accuracy compared with earlier designs.

For Acura RL and Acura TL applications, Bosch 13093 provides the correct threaded, heated, specific-fit configuration for downstream service replacement. If you are searching for a downstream oxygen sensor for 1996-2004 Acura RL or a downstream O2 sensor for 1995-1998 Acura TL, this part number is a direct match for the listed applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or unstable combustion control from a worn sensor
• Slow sensor response during closed-loop operation
• Elevated emissions caused by degraded downstream sensing

Installation Notes and Tips

Confirm downstream placement before ordering and match the connector, wire count, and thread size to the original sensor. Inspect the exhaust bung threads and wiring route before installation, and verify the harness reaches the factory connector without strain. Use the correct 22 mm wrench or oxygen sensor socket for removal and installation, and avoid contaminating the sensing element during handling.

Quality Assurance

Bosch backs this oxygen sensor with its OE development experience and validated aftermarket coverage. Bosch has supplied oxygen sensor technology to vehicle manufacturers for more than five decades, and this part reflects that engineering approach in a standard replacement format.