Delphi ES20073 Oxygen Sensor - Rear

Delphi ES20073 Oxygen Sensor Overview

Delphi ES20073 is a heated rear oxygen sensor built for emission control service on select Chevrolet, Suzuki, and Geo applications. It uses a 4-wire design with a square connector and 18 x 1.5 mm thread size, and the 605.0 overall length supports the listed rear mounting locations.

Built from Delphi’s OE heritage and supplier experience, this oxygen sensor is made for accurate replacement on vehicles such as the Chevrolet Tracker, Suzuki Vitara, Suzuki Sidekick, Suzuki X-90, and Geo Tracker. The Delphi ES20073 is a direct-fit option for rear sensor service where the original connector and thread specifications match.

Key Features

• Heated oxygen sensor for rear exhaust placement
• 4-wire configuration with square connector shape
• 18 x 1.5 mm thread size for listed applications
• 605.0 overall length
• Includes oxygen sensor and instruction sheet
• OE-based engineering from Delphi

Detailed Description

The Delphi ES20073 oxygen sensor is engineered for rear-position emission control replacement on 1996-2001 compact SUV and utility applications. It is listed for Fits 1998-2001 Chevrolet Tracker, Rear; Fits 1999-2000 Suzuki Vitara, Rear, without California Emission System; Fits 1996-1998 Suzuki Sidekick, Rear; Fits 1996-1998 Suzuki X-90, Rear; and Fits 1996-1997 Geo Tracker, Rear. This part cross-references Bosch 13035 for the same application.

As a heated oxygen sensor, it helps maintain proper exhaust feedback once the engine reaches operating temperature. Delphi’s OE background is reflected in the sensor’s fitment-focused design, connector style, and thread specification for direct replacement service.

What It Helps Address

• Check engine light related to rear oxygen sensor faults
• Incorrect exhaust oxygen feedback readings
• Emission system performance issues
• Rough fuel control caused by a failing rear sensor
• Replacement needs after sensor aging or contamination

Installation Notes and Tips

Confirm the rear sensor location, connector shape, wire count, and 18 x 1.5 mm thread size before installation. Verify the vehicle’s emission configuration, especially on 1999-2000 Suzuki Vitara models listed without California Emission System. Compare the original sensor length and routing to the Delphi ES20073 before final fitment.

Quality Assurance

Delphi builds this replacement using OE experience and knowledge developed through service to major automakers. That OE-based background supports consistent fitment and application-specific replacement for the listed Chevrolet Tracker, Suzuki Sidekick, Suzuki X-90, Suzuki Vitara, and Geo Tracker vehicles.