Note: This oil cooler kit requires no modifications to work with the BMW E46 Performance Aluminium Radiator.

The S54 is an incredible feat of engineering. Smooth power delivery, individual throttle bodies, and an 8,000 rpm redline make for an unforgettable driving experience. As with any BMW, maintaining optimal oil temperatures is key to extending the life of your vehicle and ensuring that you're getting an unparalleled driving experience. As many of these vehicles see frequent track time, the team at Mishimoto decided to develop a performance oil cooler kit that would not only provide improved durability, but also deliver the power needed for track driving. The result: an extremely efficient core that provides a proven 30°F (16.7°C) drop in oil temperature. With an increase in core thickness of 110%, this oil cooler kit increases your oil capacity by 0.44 qt. The oil cooler end tanks, cast from a single piece of aluminium and TIG-welded to the core, have been designed for maximum reliability, giving you the confidence you need to push your E46 M3 to the limits.

This oil cooler kit is designed as a complete bolt-in fit, requiring no modification to work with the stock radiator or the Mishimoto BMW E46 Performance Aluminium Radiator. To ensure a complete direct-fit, Mishimoto engineers have designed a fully CNC-machined 6061 aluminium and 303 stainless steel BMW E46 Oil Line Fitting Kit, which makes the removal of the stock hard lines and installation of stainless steel braided lines a simple task. This kit includes preassembled stainless steel lines with -10AN fittings to help direct the oil to and from the cooler, as well as a black Mishimoto Oil Line Stay to keep your lines from rubbing. As with all our products, the Mishimoto E46 M3 Oil Cooler Kit includes the Mishimoto Lifetime Warranty

• Direct fit for the BMW E46 M3
• Reduces oil temperatures by 30°F (16.7°C)
• 10 psi reduction in pressure loss
• One-piece billet end tanks for maximum reliability
• Increases oil capacity by 0.44 qt
• Increase in core thickness of 110%
• Premade stainless steel braided oil lines with durable -10AN fittings
• Includes 100% CNC-machined 6061 aluminium -10AN BMW E46 Oil Line Fitting Kit
• Mishimoto Oil Line Stay included to prevent lines from rubbing
• Fits with stock and Mishimoto radiators
• Natural CNC-machined finish
• Mishimoto Lifetime Warranty

Specifications

COOLER CONSTRUCTION
Bar-and-Plate

CORE THICKNESS
2.5"

TANK WALL THICKNESS
.16" (4mm)

INSTALLATION TORQUE SPECS
10 ft/lbs for Oil Line Fitting Kit bolt.

INCREASE IN OIL CAPACITY
0.44 Quarts (0.42 L)

TEMPERATURE DIFFERENCE
30°F (16.7°C)

OVERALL SIZE
26.1" x 3.4" x 4.3"

CORE SIZE
23.62" x 3.02"

INLET
-10AN

OUTLET
-10AN

(1) Mishimoto Oil Cooler w/ -10AN Fittings 
(1) Mishimoto Oil Line Fitting Kit 
(1) 1'8" Stainless Steel Braided Hose with 45° and 45° -10AN Fittings 
(1) 3'5" Stainless Steel Braided Hose with 45° and 90° -10AN Fittings 
(1) Mishimoto Oil Line Stay, Black
(2) M6 x 1.0 x 16mm Button-Head Bolts (for installation with Mishimoto radiator) 
Mishimoto Lifetime Warranty

FITS
01–06 BMW E46 M3

ENGINE CODES
S54

CHASSIS CODES
E46

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 

MMOC-E46-01

Manufactured by

Mishimoto

Warranty

Mishimoto Lifetime Warranty

BMW E46 M3 Oil Cooler Kit Features & Benefits