Delphi ES20112 Oxygen Sensor - Front

Delphi ES20112 Oxygen Sensor Overview

The Delphi ES20112 is a heated oxygen sensor built for front-position applications on select Chevrolet, Geo, and Suzuki vehicles. It draws on Delphi’s OE heritage and decades of supplier experience to deliver a direct-fit replacement for emissions control service.

Compatible With 1994-2001 Chevrolet Metro, 1995-1997 Geo Metro, 1995-2001 Suzuki Swift, 1999-2000 Chevrolet Tracker, and 1999-2000 Suzuki Vitara in front sensor locations where listed.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal response
• 4-wire design for modern sensor circuit requirements
• Square connector shape for OE-style electrical connection
• 18 x 1.5 mm thread size for direct exhaust bung fitment
• 380.0 overall length for application-specific routing
• Package includes the oxygen sensor and instruction sheet
• Front position fitment for listed vehicles

Detailed Description

Delphi ES20112 is an emission control oxygen sensor engineered for front sensor placement on select Chevrolet Metro, Geo Metro, Suzuki Swift, Chevrolet Tracker, and Suzuki Vitara applications. The heated design helps the sensor reach operating temperature quickly, supporting accurate exhaust feedback for engine management systems. Delphi builds this replacement with OE experience and supplier knowledge developed through service to major automakers, bringing factory-style fit and function to the aftermarket.

This part cross-references DENSO Auto Parts (e.g., 234-4049, 234-4060) for the same application. Part number ES20112 is also referenced in interchange listings for multiple OE and aftermarket numbers, making it easier to match the correct sensor during service work.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn front sensor
• Slow sensor warm-up after cold starts
• Emissions test failures tied to sensor response issues
• Rough idle or drivability problems caused by inaccurate exhaust readings

Installation Notes and Tips

Verify the vehicle’s front sensor location, connector shape, thread size, and wire count before installation. This ES20112 oxygen sensor is listed for front positions only, including 1998-2001 Chevrolet Metro front, 1996-2001 Suzuki Swift front, 1999-2000 Chevrolet Tracker front without California Emission System, and 1999-2000 Suzuki Vitara front without California Emission System. It also fits 1996-1997 Geo Metro front and 1994 Geo Metro with California Emission System where specified.

Use the included instruction sheet during installation and confirm the exhaust bung threads are clean and undamaged before threading the sensor into place.

Quality Assurance

Delphi’s OE background and long-standing supplier experience are built into this replacement oxygen sensor, supporting consistent fitment and dependable emissions-system service for the listed applications.