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Delphi ES20318 Oxygen Sensor - Rear or Rear Left
| Brand | Delphi ES20318 |
|---|---|
| Position | Rear |
| Connector Shape | Round |
| Overall Length | 325.0 |
| Package Contents | Oxygen Sensor, Instruction Sheet |
| Position(s) | Rear, Rear Left. For the position specific to your vehicle, refer to the Application tab. |
| Sensor Type | Heated |
| Thread Size | 18 x 1.5 mm |
| Wire Quantity | 4 |
| Fits | Ford, Lincoln, Mazda, Mercury, and Jaguar · 49 vehicles |
Heated sensor. Delivers faster operation for quicker emissions monitoring.
Round connector. Simplifies hookup with a clean, secure electrical connection.
OE heritage. Built with 100 years of OE experience and supplier knowledge.
Cross-references BBB Industries 11655, Bosch 15716 and Bosch 15717 for the same application. See all 42.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Delphi ES20318 Oxygen Sensor Overview
The Delphi ES20318 is a heated oxygen sensor built for rear exhaust monitoring on select Ford, Lincoln, Mazda, Mercury, and Jaguar applications. It combines OE-based engineering with a 4-wire design, round connector shape, and 18 x 1.5 mm thread size for direct-fit replacement service.
Compatible With rear and rear left positions on vehicles such as the Ford Edge, Ford Flex, Ford Taurus, Lincoln MKX, Lincoln MKZ, and Mazda 6, this Delphi oxygen sensor supports accurate exhaust feedback for emissions system operation. The ES20318 is also a fitment match for several Mercury and Jaguar applications listed below.
Key Features
- Heated oxygen sensor for rear exhaust placement
- 4-wire configuration for monitored signal and heater circuit operation
- Round connector shape for OE-style connection fit
- 18 x 1.5 mm thread size
- Overall length: 325.0
- Package contents: oxygen sensor and instruction sheet
- OE heritage backed by Delphi’s long history supplying automakers
Detailed Description
Delphi ES20318 is an emission control sensor engineered from OE experience and built for vehicles that rely on rear oxygen sensor feedback to manage emissions performance. The heated design helps the sensor reach operating temperature quickly, while the 4-wire layout supports stable signal and heater function in the exhaust stream. This part number is commonly searched as Delphi ES20318 oxygen sensor, rear oxygen sensor replacement, and heated O2 sensor for Ford Edge, Lincoln MKZ, and Mazda 6 applications.
This part cross-references Bosch 15716 and DENSO Auto Parts 234-4001 for the same application.
What It Helps Address
- Check engine light related to rear oxygen sensor performance
- Fault codes tied to slow sensor response or heater circuit issues
- Incorrect exhaust feedback affecting emissions monitoring
- Rough idle or drivability concerns caused by inaccurate sensor readings
- Failed inspection results linked to emissions system faults
Installation Notes and Tips
Verify the exact position before ordering, since this sensor is listed for rear and rear left locations depending on vehicle application. Confirm thread size, connector shape, and wire count against the original sensor before installation. Use the vehicle application data to match the correct side and model year for Ford Taurus, Lincoln MKS, Mercury Sable, and related fitments.
Fits 2007-2010 Ford Edge, rear. Fits 2009-2010 Ford Flex, rear. Fits 2008-2010 Ford Taurus, rear. Fits 2009-2010 Lincoln MKS, rear. Fits 2010 Lincoln MKS, rear left. Fits 2010 Lincoln MKT, rear. Fits 2010 Lincoln MKT, rear left. Fits 2007-2010 Lincoln MKX, rear. Fits 2007-2010 Lincoln MKZ, rear. Fits 2009-2010 Mazda 6, rear. Fits 2008-2009 Ford Taurus X, rear. Fits 2008-2009 Mercury Sable, rear. Fits 2005-2007 Ford Five Hundred, rear left. Fits 2005-2007 Ford Freestyle, rear left. Fits 2006-2007 Mercury Montego, rear left. Fits 2005 Mercury Montego, rear left. Fits 2002 Jaguar S-Type, rear. Fits 2000-2002 Mercury Cougar, rear. Fits 2001 Jaguar S-Type, rear. Fits 1998-2000 Ford Contour, rear. Fits 1998-2000 Mercury Mystique, rear. Fits 1999 Mercury Cougar, rear.
Quality Assurance
Delphi builds this sensor using OE heritage and knowledge developed through long-term supplier experience with major automakers. The ES20318 reflects that background in an aftermarket replacement part for emissions control service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2010 | Ford | Edge | Rear | — |
| 2010 | Ford | Flex | Rear | — |
| 2010 | Ford | Taurus | Rear | — |
| 2010 | Lincoln | MKS | Rear | — |
| 2010 | Lincoln | MKS | Rear Left | — |
| 2010 | Lincoln | MKT | Rear | — |
| 2010 | Lincoln | MKT | Rear Left | — |
| 2010 | Lincoln | MKX | Rear | — |
| 2010 | Lincoln | MKZ | Rear | — |
| 2010 | Mazda | 6 | Rear | — |
| 2009 | Ford | Edge | Rear | — |
| 2009 | Ford | Flex | Rear | — |
| 2009 | Ford | Taurus | Rear | — |
| 2009 | Ford | Taurus X | Rear | — |
| 2009 | Lincoln | MKS | Rear | — |
| 2009 | Lincoln | MKX | Rear | — |
| 2009 | Lincoln | MKZ | Rear | — |
| 2009 | Mazda | 6 | Rear | — |
| 2009 | Mercury | Sable | Rear | — |
| 2008 | Ford | Edge | Rear | — |
| 2008 | Ford | Taurus | Rear | — |
| 2008 | Ford | Taurus X | Rear | — |
| 2008 | Lincoln | MKX | Rear | — |
| 2008 | Lincoln | MKZ | Rear | — |
| 2008 | Mercury | Sable | Rear | — |
| 2007 | Ford | Edge | Rear | — |
| 2007 | Ford | Five Hundred | Rear Left | — |
| 2007 | Ford | Freestyle | Rear Left | — |
| 2007 | Lincoln | MKX | Rear | — |
| 2007 | Lincoln | MKZ | Rear | — |
| 2007 | Mercury | Montego | Rear Left | — |
| 2006 | Ford | Five Hundred | Rear Left | — |
| 2006 | Ford | Freestyle | Rear Left | — |
| 2006 | Mercury | Montego | Rear Left | — |
| 2005 | Ford | Five Hundred | Rear Left | — |
| 2005 | Ford | Freestyle | Rear Left | — |
| 2005 | Mercury | Montego | Rear Left | From 01/03/2005 |
| 2002 | Jaguar | S-Type | Rear | — |
| 2002 | Mercury | Cougar | Rear | — |
| 2001 | Jaguar | S-Type | Rear | From Chassis # L86902 |
| 2001 | Mercury | Cougar | Rear | — |
| 2000 | Ford | Contour | Rear | — |
| 2000 | Mercury | Cougar | Rear | — |
| 2000 | Mercury | Mystique | Rear | — |
| 1999 | Ford | Contour | Rear | — |
| 1999 | Mercury | Cougar | Rear | From 05/1999 |
| 1999 | Mercury | Mystique | Rear | — |
| 1998 | Ford | Contour | Rear | — |
| 1998 | Mercury | Mystique | Rear | — |
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