Description
The Mishimoto Replacement Transmission Oil Cooler, part number MMOC-N5X-06, is a direct-fit aluminum unit engineered specifically for BMW vehicles equipped with the N20, N52, or N55 engine codes. It replaces the factory liquid-to-liquid transmission oil cooler that regulates transmission fluid temperature using the engine’s own cooling system, and it’s built to match OEM specifications for fit and function.
Over time, the factory-style transmission oil cooler on these BMW models can wear out and fail, allowing coolant to leak into the transmission fluid — a problem that can lead to catastrophic transmission damage and costly repairs. This Mishimoto trans cooler is designed as a straightforward, no-modification replacement, using the factory lines and hardware for a clean installation. It’s constructed from durable, corrosion-resistant natural aluminum with a stacked-plate core, and it’s backed by the Mishimoto Lifetime Warranty for long-term peace of mind.
Vehicle Applications
This Mishimoto oil cooler is a direct fit for a wide range of BMW models built on the N20, N52, and N55 platforms. Coverage includes the 128i (2008-2013), the 228i (2014-2016) and 228i xDrive (2015-2016), the 320i (2013-2018) and 320i xDrive (2013-2017), the 328i (2013-2016) and 328i xDrive (2013), and the 428i (2014-2016) along with the 428i Gran Coupe (2015-2016). It also fits the 525i (2006-2008), 525xi (2006-2007), 528i (2008-2011 and 2014-2016), 528i xDrive (2009-2010 and 2012-2016), and 528xi (2008), as well as the 530i (2004-2007) and 530xi (2006-2007). Additional coverage spans the 535i (2008-2016), 535i GT (2010-2017), 535i GT xDrive (2011-2017), and 535i xDrive (2009-2016), the 640i, 640i Gran Coupe, 640i xDrive, and 640i xDrive Gran Coupe (all 2014-2016), the X1 (2014-2016), X3 (2006-2017), X4 (2015-2018), X5 (2006-2016), X6 (2008-2016), and the Z4 (2004-2008).
Features
- Direct fit for 2006-2018 BMW N20, N52, and N55 engine-equipped models
- Equivalent to OEM specifications for fit and function
- Replaces a leaking or failing factory transmission oil cooler
- Durable, corrosion-resistant aluminum construction with natural aluminum finish
- Includes a bracket for easy installation
- Utilizes all factory lines and hardware — no modification required
- Stacked-plate core construction
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Core Material: Aluminum
- Finish: Natural Aluminum
- Core Construction: Stacked Plate
- Overall Width: 4.5 in
- Overall Length: 6.91 in
- Overall Height: 2.94 in
- Core Height: 2.75 in
- Core Thickness: 2.18 in
- Core Width: 5.375 in
- Inlet Diameter: 16mm
- Outlet Diameter: 16mm
- Mounting Hardware Included: No
- Electric Fan: No
- Line Included: No
- Grade Type: Standard Replacement
- Engine Codes: N20, N52, N55
- Chassis Codes: E87, F30, F32, F33, E60, E61, F10, F11, F06, F12, F13, E84, E83, F26, E70, E71, E85, F22, F23
- Includes: (1) Oil Cooler, (1) Oil Cooler Gasket, Mishimoto Lifetime Warranty
Frequently Asked Questions
What vehicles does the Mishimoto MMOC-N5X-06 transmission oil cooler fit?
It is a direct fit for BMW models equipped with the N20, N52, or N55 engine, including the 128i, 228i, 228i xDrive, 320i, 320i xDrive, 328i, 328i xDrive, 428i, 428i Gran Coupe, 525i, 525xi, 528i, 528i xDrive, 528xi, 530i, 530xi, 535i, 535i GT, 535i GT xDrive, 535i xDrive, 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, X1, X3, X4, X5, X6, and Z4, spanning model years 2004 through 2018 depending on the specific trim.</li></li>
Does this cooler require any modifications to install?
No. It utilizes all factory lines and hardware and requires no modification for installation.
What is this cooler made from?
It is constructed from aluminum with a natural aluminum finish and a stacked-plate core.
What comes included with the Mishimoto MMOC-N5X-06?
The package includes (1) Oil Cooler, (1) Oil Cooler Gasket, and the Mishimoto Lifetime Warranty.
Why would I need to replace the factory transmission oil cooler?
The factory liquid-to-liquid transmission oil cooler on these BMW models can eventually wear out and fail, leaking coolant into the transmission fluid, which can lead to costly transmission damage.
Does the cooler include mounting hardware or fluid lines?
No, mounting hardware and lines are not included, but a bracket is included for easy installation.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
