Delphi ES10657 Oxygen Sensor - Rear

Rear Oxygen Sensor for Hyundai Applications

Delphi ES10657 is a heated rear oxygen sensor built for precise exhaust monitoring on select Hyundai vehicles. It combines OE heritage with application-specific fitment for 1996-1999 Hyundai Accent, 1996-1997 Hyundai Elantra, and 1997 Hyundai Tiburon rear positions.

Key Features

• Heated oxygen sensor for faster operating temperature
• 4-wire design with square connector shape
• 18 x 1.5 mm thread size
• 450.0 overall length
• Rear position fitment
• Includes oxygen sensor and instruction sheet

Detailed Description

Delphi ES10657 is an emission control oxygen sensor engineered for rear exhaust placement on select Hyundai Accent, Elantra, and Tiburon models. Delphi draws on more than a century of OE experience and supplier knowledge used by major automakers, bringing original-equipment development insight to this aftermarket replacement. The heated sensor design helps the unit reach operating temperature quickly for stable exhaust feedback, while the 4-wire configuration and square connector support direct replacement on the listed applications. This part cross-references Bosch 13394 and DENSO Auto Parts 234-4691 for the same application.

What It Helps Address

• Check engine light related to rear oxygen sensor performance
• Incorrect exhaust feedback from a worn sensor element
• Rough idle or drivability concerns tied to emissions monitoring
• Failed emissions inspection caused by sensor-related faults
• Connector or thread mismatch during rear sensor replacement

Installation Notes and Tips

Verify rear sensor placement before installation and confirm the 18 x 1.5 mm thread size matches the original unit. Check connector shape, wire count, and overall length against the removed sensor to ensure proper routing and connection. Fits 1996-1999 Hyundai Accent, rear; Fits 1996-1997 Hyundai Elantra, rear; Fits 1997 Hyundai Tiburon, rear. For 1997 Hyundai Accent, rear, this part applies only to vehicles built from 05/01/1997 to 05/01/1997 and without California Emission System. For 1996 Hyundai Accent, rear, this part applies only without California Emission System.

Quality Assurance

Delphi builds this oxygen sensor with OE-based engineering and manufacturing knowledge developed through long-term supplier experience with leading automakers. That background supports consistent fitment and sensor construction for the listed Hyundai rear applications.