Rally Road Basic BMW Banjo Oil Pressure Adapter — -4AN / M12x1.5

Looking for a simple way to add an oil supply line or relocate your factory oil pressure switch without installing a large multi-port adapter? The Rally Road Basic Banjo Oil Pressure Adapter provides a compact and straightforward solution for a wide range of BMW engines.

While larger oil distribution blocks are great when you need to install multiple pressure and temperature sensors, not every build requires that much hardware. Rally Road's basic adapter gives you the connection you need in a clean, compact package.

The adapter installs at the factory oil pressure port on the oil filter housing using the included custom stainless steel banjo bolt. The banjo-style design also allows the aluminum adapter block to be rotated or clocked into the position that works best for your particular engine bay or swap configuration.

It's an especially useful solution when adding a -4AN turbocharger oil feed line to a BMW engine.

Kit Includes

• 1 Rally Road Machined Aluminum Banjo Oil Fitting
• 1 Stainless Steel -4AN to M12 Banjo Bolt
• 2 Copper Sealing Washers

Product Features

• Compact alternative to a multi-port oil distribution block
• Installs at the factory oil pressure switch location
• -4AN connection makes plumbing a turbo oil supply line easy
• M12x1.5 port retains the factory BMW oil pressure switch
• Banjo design allows the adapter to be rotated or clocked
• Helps simplify oil line routing in tight engine bays
• Machined aluminum adapter block
• Stainless steel banjo bolt
• Copper sealing washers included
• Excellent for turbo builds, engine swaps, and custom applications

Perfect for Turbo Oil Feed Lines

Adding a turbocharger to a BMW engine means finding a reliable source of pressurized engine oil.

Rather than drilling, tapping, or building a complicated series of fittings, the Rally Road adapter allows you to access oil pressure directly from the factory oil pressure switch location.

The custom banjo bolt provides a -4AN connection, a commonly used size for turbocharger oil feed plumbing, while the adapter block retains an M12x1.5 port for the original BMW oil pressure switch.

The result is a clean solution that lets you supply your turbo while retaining the functionality of the factory oil pressure warning system.

Clockable Banjo Design

One of the biggest advantages of using a banjo-style fitting is flexibility in positioning.

Engine swaps, turbo manifolds, intake components, and other modifications can make space around the oil filter housing extremely tight. Because this adapter can be rotated before the banjo bolt is tightened, you can clock the fitting to the angle that works best for your specific installation.

This makes oil line routing cleaner and helps keep the adapter and plumbing away from surrounding components.

Applicable BMW Engines

Designed for a wide range of classic and modern BMW engines, including:

• M10
• M20
• M30
• M50
• M52
• M54
• S50
• S52
• S54

Fitment Guide

BMW 3 Series

*Exact model/engine availability varies by production date and market.

BMW 5 Series

*M50-powered 525i applications only.

BMW Z Series

Important Fitment Note

This adapter is designed around BMW applications using the appropriate M12x1.5 oil pressure switch port. Engine swaps, aftermarket oil filter housings, and other modifications can change the available ports and clearances.

For custom or swapped applications, verify the thread size and available clearance before ordering.

Simple, Compact Oil Pressure Solution

Not every BMW needs a large multi-port oil distribution block. If your goal is simply to add a -4AN oil supply while retaining the factory oil pressure switch, the Rally Road Basic Banjo Oil Pressure Adapter gets the job done with minimal hardware.

The clockable banjo design makes installation especially useful on turbocharged and engine-swapped BMWs where space and oil line routing matter.