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This Genuine Motorcraft CX-863-A (E43Z-9G428-B) Exhaust Gas Recirculation (EGR) Valve Position (EVP) Sensor is a critical New Old Stock (NOS) component for maintaining the emission control system in your classic Ford, Lincoln, or Mercury vehicle. Specifically designed for models produced between 1978 and 1987, this 3-terminal sensor features male bullet-style terminals and is responsible for precisely monitoring the position of the EGR valve to ensure optimal engine performance and efficiency. Manufactured to original Ford specifications in the USA, this sensor provides the exact voltage output and durability required for a high-quality restoration of vehicles such as the Ford Mustang, Bronco, F-Series trucks, and premium Lincoln and Mercury sedans. Utilizing an authentic NOS sensor avoids the compatibility and calibration issues often associated with modern universal aftermarket replacements.
| Make | Model | Year | Engine | Notes |
|---|---|---|---|---|
| Ford | Mustang / Bronco / F-150 / F-250 / LTD / Ranger / Aerostar / Thunderbird | 1978-1987 | 3.8L / 4.9L / 5.0L / 5.8L | EGR Valve Position (EVP) Sensor |
| Lincoln | Continental / Mark VI / Mark VII / Town Car / Versailles | 1979-1985 | 3.8L / 5.0L / 5.8L | Monitors EGR valve position |
| Mercury | Cougar / Grand Marquis / Marquis / Monarch / Capri | 1979-1987 | 3.8L / 4.9L / 5.0L / 5.8L | Original 3-bullet terminal design |
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987
Note on Stock Photos: Due to our inventory of multiple identical units for this specific part number, we utilize representative stock photos for this listing. You will receive a component that strictly meets all listed specifications and fitment requirements. Please be aware that because these are vintage parts, minor cosmetic variations—such as surface finish, color, or production markings—may exist between different manufacturing runs. These slight aesthetic differences are a result of historical production processes and do not impact the part's integrity, performance, or authenticity.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these parts may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
While many of our vintage parts were manufactured decades ago, they remain unused and high-quality. Some original boxes may show signs of shelf-wear, such as dust, tape, or surface distress from years of storage. Rest assured, the components inside have been inspected to ensure they are complete and ready to help you finish your project without breaking the bank.
