Hella 003259711 Engine Oil Pressure Switch

Hella Engine Oil Pressure Switch 003259711

The Hella 003259711 engine oil pressure switch is a 12V, normally closed contact switch built for accurate oil pressure monitoring in select Ford, Mazda, and Mercury applications. With a 1/4-18 NPT thread, 24 mm spanner size, and a 0.4 bar switch pressure rating, it is a direct-fit service part for vehicles that rely on a single-terminal oil pressure signal.

Hella Electronics brings OE competence developed over more than 60 years, and this oil pressure switch reflects that focus on dependable engine control components. The Hella 003259711 is a practical replacement for drivers servicing a Ford Escape, Ford Focus, Mazda Tribute, Mercury Cougar, Ford Contour, or Mercury Mystique with the specified engine oil pressure switch configuration.

Key Features

• Engine oil pressure switch for 12V electrical systems
• Normally closed contact design
• 0.4 bar switch pressure rating
• 1/4-18 NPT thread size
• Single connector, black housing
• 24 mm spanner size for service access
• Hella part number 003259711

Detailed Description

This Hella engine oil pressure switch is engineered for vehicles that use a single-wire, normally closed oil pressure circuit. It monitors oil pressure and communicates the signal needed for the dashboard warning system or engine control logic, depending on the vehicle application. Compatible vehicle coverage includes 2001-2004 Ford Escape, 2000-2004 Ford Focus, 2001-2004 Mazda Tribute, 1999-2002 Mercury Cougar, 1999-2000 Ford Contour, and 1999-2000 Mercury Mystique. This part cross-references Standard Ignition PS-320 for the same application.

What It Helps Address

• Oil pressure warning light staying on or triggering incorrectly
• Intermittent oil pressure signal from a worn switch
• Faulty single-terminal pressure switch operation
• Replacement needs during engine electrical diagnostics
• Service replacement for aging Ford, Mazda, and Mercury oil pressure switch assemblies

Installation Notes and Tips

• Confirm the thread size is 1/4-18 NPT before installation.
• Verify the vehicle uses a normally closed contact oil pressure switch with a 0.4 bar rating.
• Inspect the connector and wiring for corrosion or damage before fitting the new switch.
• Use the 24 mm spanner size for removal and tightening.
• Check for oil leaks and confirm warning lamp operation after installation.

Quality Assurance

Hella is known for OE electronics competence and long-standing experience in engine management and switch technology. Part number 003259711 is built to meet the specified electrical and mechanical requirements for the listed applications.