Walker 256-1037 Engine Oil Pressure Switch

Engine Oil Pressure Switch Overview

Walker 256-1037 is an OE replacement engine oil pressure switch built to monitor lubrication pressure and send a warning signal when pressure drops below safe limits. It is a direct-fit electrical switch for vehicles that rely on factory oil pressure monitoring, including many Toyota and Lexus applications.

Fits a wide range of Toyota Corolla, Toyota Camry, Lexus ES350, and Toyota Tacoma applications. The 256-1037 part number is used for factory-style oil pressure warning function across many model years.

Key Features

• OE replacement design for factory-style oil pressure monitoring
• Matches OE specifications for pressure threshold, thread size, terminal type, and electrical response
• High-temperature and oil-resistant construction for engine bay exposure
• Spade terminal with 1 female connector and 1 male terminal
• Black housing for a direct replacement appearance

Detailed Description

Walker 256-1037 is engineered to activate the oil warning circuit or ECU input when pressure falls outside the normal operating range. That makes it a practical replacement when the original switch causes flickering oil lights, false warnings, or fails to report a real low-pressure condition. The switch threads into the factory location and connects to existing wiring without modification.

This part cross-references DENSO (e.g., 83530-60010, 83530-60020) for the same application. It is a fitment-based replacement for many Toyota and Lexus models, including Toyota Corolla, Toyota Camry, Lexus RX350, and Toyota 4Runner applications. The 256-1037 part number is commonly selected for service work, drivability repairs, and engine rebuilds where accurate oil pressure signaling is required.

What It Helps Fix

• Oil warning light flickering or staying on incorrectly
• Loss of oil pressure signal to the dashboard or ECU
• False low-oil-pressure warnings
• Failed switch response under actual low-pressure conditions
• Intermittent lubrication-system warning behavior

Installation Notes and Tips

Install in the factory oil pressure switch location and connect to the existing harness using the original terminal style. Verify thread engagement and electrical connection before returning the vehicle to service. Confirm the exact application by year, make, and model, since fitment spans many Toyota, Lexus, Scion, Pontiac, Geo, and Chevrolet vehicles.

Quality Assurance

Walker Products manufactures this switch to OE specifications and uses high-temperature, oil-resistant materials for consistent operation in engine environments. The 256-1037 is built for direct OE-style replacement performance.