Delphi ES10220 Oxygen Sensor

Delphi ES10220 Oxygen Sensor Overview

The Delphi ES10220 is a front oxygen sensor built for specific Ford, Mercury, and Mazda applications that use a non-heated, single-wire design. With a square connector shape, 18 x 1.5 mm thread size, and 655.0 overall length, it matches the OE-style configuration needed for accurate exhaust feedback on the listed vehicles.

Delphi draws on OE heritage and supplier experience with major automakers, bringing that engineering background into this aftermarket oxygen sensor. This part is a direct-fit option for vehicles such as the Mazda 323, Mazda 626, Mazda MX-6, Mercury Capri, Mercury Tracer, Ford Probe, and Mazda B2600 where the specified sensor layout is required.

Key Features

• Part number ES10220 oxygen sensor for front position applications
• Non-heated, 1-wire sensor design
• Square connector shape for OE-style connection
• 18 x 1.5 mm thread size
• 655.0 overall length for listed fitments
• Package includes oxygen sensor and instruction sheet

Detailed Description

The Delphi ES10220 is engineered as an emission control sensor for front-mounted applications on select 1986-1994 Ford, Mercury, and Mazda vehicles. It is specified with a non-heated sensing element, one wire, and a square connector, making it a straightforward replacement for vehicles that use this exact configuration. If you are servicing a 1991-1994 Mercury Capri, 1989 Ford Probe, 1986-1989 Mazda 323, 1986-1989 Mazda 626, 1988-1989 Mazda MX-6, 1988-1989 Mercury Tracer, or 1987 Mazda B2600, the ES10220 matches the listed OE-style requirements.

This Delphi oxygen sensor cross-references Bosch 12054 and DENSO Auto Parts 234-1019 for the same application. The ES10220 part number is also commonly searched alongside Mazda 626 oxygen sensor, Ford Probe front oxygen sensor, and Mercury Capri O2 sensor replacement queries.

Common Issues This Sensor Can Address

• Faulty oxygen sensor readings on the front exhaust stream
• Check engine light concerns related to sensor performance
• Rough idle or drivability issues tied to incorrect air-fuel feedback
• Emissions test failures caused by a worn sensor
• Fuel mixture control problems from an aging OE-style sensor

Installation Notes and Tips

Confirm the vehicle uses the listed 655 mm overall length, non-heated, single-wire configuration before installation. Match the square connector and 18 x 1.5 mm thread size to the original sensor, and verify the front position requirement on the vehicle. For best results, compare the old sensor’s connector style and harness routing before removal, especially on Mazda 323, Mazda 626, and Ford Probe applications.

Quality Assurance

Delphi builds on more than a century of OE experience and supplier knowledge from working with leading automakers. That OE background is reflected in the ES10220’s fitment-focused design and application-specific construction for the listed Ford, Mercury, and Mazda vehicles.