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Delphi ES20191 Oxygen Sensor - Front or Rear
| Brand | Delphi ES20191 |
|---|---|
| Position | Rear and Front |
| Sensor Type | Heated |
| Wire Quantity | 4 |
| Connector Shape | Square |
| Thread Size | 18 x 1.5 mm |
| Overall Length | 520.0 |
| Package Contents | Oxygen sensor, instruction sheet |
| Position(s) | Front, rear. for the position specific to your vehicle, refer to |
| Fits | Chevrolet, Geo, and Suzuki · 30 vehicles |
Heated sensor. Helps the oxygen sensor reach operating temperature quickly.
Square connector. Provides a straightforward electrical connection.
OE heritage. Built on 100 years of OE experience and supplier knowledge.
Cross-references Bosch 13073, Carlson 15059 and DENSO Auto Parts 234-4060 for the same application. See all 21.
Delphi Heated Oxygen Sensor ES20191
Delphi ES20191 is a heated oxygen sensor built for precise exhaust monitoring in select Suzuki, Geo, and Chevrolet applications. It uses a 4-wire design, a square connector, and an 18 x 1.5 mm thread size to match the specified OE-style fitment.
Key Features
- Heated oxygen sensor for faster operating temperature and stable signal output
- 4-wire configuration with square connector
- Thread size: 18 x 1.5 mm
- Overall length: 520.0
- Package includes the oxygen sensor and instruction sheet
- Position coverage: front and rear, depending on vehicle application
Detailed Description
Delphi ES20191 is engineered from more than a century of OE experience and supplier knowledge used by major automakers. This oxygen sensor is built for vehicles that require a heated, 4-wire sensor with the listed connector and thread specifications, helping maintain accurate exhaust feedback for the engine management system. It is a direct-fit replacement for applications such as 1995-2000 Suzuki Esteem, 1998 Chevrolet Tracker, 1996-1998 Suzuki Sidekick, 1996-1998 Suzuki X-90, and 1996-1997 Geo Tracker. This part cross-references Bosch 13073 and DENSO Auto Parts 234-4060 for the same application.
What It Is Used For
- Restoring oxygen sensor signal accuracy after sensor aging
- Addressing check engine light concerns tied to exhaust feedback faults
- Correcting poor fuel control caused by a slow or contaminated sensor
- Replacing a damaged sensor connector or worn sensor body
- Supporting proper emissions system operation on listed vehicles
Installation Notes and Tips
- Verify the exact sensor position for your vehicle before ordering; this part covers front, rear, and some N/A fitments listed by application.
- Confirm the connector shape, wire count, and thread size match the original sensor.
- Inspect the exhaust bung threads before installation to ensure proper seating.
- Use the vehicle application data to confirm whether your model uses the front or rear location.
Quality Assurance
Delphi builds this sensor using OE heritage and application knowledge drawn from its long history supplying original equipment to automakers. The ES20191 part number is listed for multiple OE and aftermarket interchange references, supporting confident replacement selection for the specified vehicles.
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2000 | Suzuki | Esteem | — | Rear | — |
| 2000 | Suzuki | Esteem | — | Front | — |
| 1999 | Suzuki | Esteem | — | Rear | — |
| 1999 | Suzuki | Esteem | — | Front | — |
| 1998 | Chevrolet | Tracker | — | Front | — |
| 1998 | Suzuki | Esteem | — | Rear | — |
| 1998 | Suzuki | Esteem | — | Front | — |
| 1998 | Suzuki | Sidekick | — | Front | — |
| 1998 | Suzuki | X-90 | — | Front | — |
| 1997 | Geo | Tracker | — | Front | — |
| 1997 | Suzuki | Esteem | — | Rear | — |
| 1997 | Suzuki | Esteem | — | Front | — |
| 1997 | Suzuki | Sidekick | — | Front | — |
| 1997 | Suzuki | X-90 | — | Front | — |
| 1996 | Geo | Tracker | — | Front | — |
| 1996 | Suzuki | Esteem | — | Rear | — |
| 1996 | Suzuki | Esteem | — | Front | — |
| 1996 | Suzuki | Sidekick | — | Front | — |
| 1996 | Suzuki | X-90 | — | Front | — |
| 1995 | Geo | Tracker | — | N/A | with California Emission System |
| 1995 | Suzuki | Esteem | — | Rear | — |
| 1995 | Suzuki | Esteem | — | Front | — |
| 1995 | Suzuki | Sidekick | JX | N/A | with DOHC Engine |
| 1995 | Suzuki | Sidekick | JS | N/A | — |
| 1995 | Suzuki | Sidekick | JLX | N/A | with DOHC Engine |
| 1994 | Geo | Tracker | — | N/A | with California Emission System |
| 1994 | Suzuki | Sidekick | JX | N/A | with DOHC Engine |
| 1994 | Suzuki | Sidekick | JS | N/A | — |
| 1994 | Suzuki | Sidekick | JLX | N/A | with DOHC Engine |
| 1993 | Suzuki | Sidekick | — | N/A | with California Emission System; with Hardtop |
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