BCBC M531 Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump, part number M531, is a standard replacement for a range of Honda and Acura applications. It is built with a rotary design, aluminum housing and cover, and close-tolerance internal machining for consistent oil pressure and efficient operation.

Key Features

• Standard replacement engine oil pump for stock applications
• Rotary oil pump design with powdered metal rotor material
• Aluminum housing and aluminum cover with rust preventative finish
• Gasket or seal included, with O-ring included
• Individually tested for pressure and flow under operating conditions
• Crankshaft-driven design with standard pressure and standard volume output

Detailed Description

Melling part number M531 is engineered for stock-style engine lubrication systems where dependable oil delivery is required. The pump uses gear and gerotor technology, precision-ground end plates, and machined components to help maintain proper engine pressure and efficient pump operation. It is a direct fit for select Honda Odyssey, Honda Pilot, Honda Ridgeline, Honda Accord, and Acura models listed in the fitment data, making it a practical choice for maintenance or repair work on those applications.

The M531 oil pump is built with a crankshaft drive type, six mounting holes, and a 20 mm inlet size. Its aluminum construction and rust preventative finish support durability in demanding engine environments, while the included gasket or seal and O-ring simplify parts matching during service. This part cross-references Monroe Shocks & Struts (e.g., 224-43698, 15100-R70-A02) for the same application.

What It Is Used For

• Restoring proper engine oil pressure
• Addressing low oil pressure concerns
• Replacing a worn or inefficient oil pump
• Supporting consistent lubrication in stock engine setups
• Correcting pressure loss caused by internal pump wear

Installation Notes and Tips

Verify engine code and application details against the fitment list before installation. Confirm gasket, seal, and O-ring requirements during service, and inspect the pickup and related lubrication components for wear or contamination while the pump is removed. Part number M531 should be matched carefully to the vehicle listed in the catalog fitment data.

Quality Assurance

Melling manufactures this oil pump to high production standards and individually tests each unit for pressure and flow to verify operation under conditions that simulate real engine use. Part number M531 is built for dependable performance in the specified Honda and Acura applications.