Delphi ES10945 Oxygen Sensor - Front

Delphi ES10945 Front Oxygen Sensor

Delphi ES10945 is a front oxygen sensor built for precise exhaust feedback on select Toyota applications. It uses a 4-wire design, square connector shape, and 18 x 1.5 mm thread size for direct replacement service on covered vehicles.

Key Features

• Front oxygen sensor for emission control service
• 4-wire configuration with square connector
• 18 x 1.5 mm thread size
• Overall length: 420.0
• Package contents: oxygen sensor and instruction sheet
• OE-based engineering backed by Delphi’s long history supplying original equipment parts

Detailed Description

Delphi ES10945 is an emission control sensor for the front position on select Toyota Tacoma, Toyota Tundra, and Toyota 4Runner models. It is listed for 2002-2004 Toyota Tacoma front, 2001-2004 Toyota Tundra front, 2000-2001 Toyota Tacoma front with California Emission System, 1999-2000 Toyota 4Runner front with California Emission System, and 2000 Toyota Tundra front with California Emission System. This part cross-references DENSO Auto Parts (e.g., 234-9002, 234-9003) for the same application.

Built from Delphi’s OE heritage and supplier experience, ES10945 is specified to match the connector, thread, and wiring requirements used in these front air-fuel ratio sensor applications. The part number ES10945 is a direct reference for shoppers searching Toyota Tacoma front oxygen sensor, Toyota Tundra front air-fuel ratio sensor, or Toyota 4Runner California emissions sensor replacement.

What It Helps Address

• Check engine light related to front oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn sensor
• Emissions test failures tied to sensor response issues
• Rough idle or drivability concerns caused by inaccurate exhaust feedback
• Fuel trim problems from degraded sensor output

Installation Notes and Tips

Verify the front sensor location, connector shape, wire count, and 18 x 1.5 mm thread size before installation. Confirm vehicle emission configuration, especially California Emission System applications, and compare the original sensor connector and lead length to ES10945. Use the included instruction sheet during installation and inspect the harness routing to avoid heat damage.

Quality Assurance

Delphi draws on more than a century of OE experience and original equipment supply knowledge, and that engineering background is reflected in this aftermarket oxygen sensor. The ES10945 part number is commonly searched alongside Toyota Tacoma, Toyota Tundra, and Toyota 4Runner front sensor replacements for accurate fitment matching.