Name: Mishimoto 15-20 BMW F8X M3/M4 Performance Auxiliary Radiator
Brand: Mishimoto
SKU: MISMMRAD-F80-15A
Price: 448.95 USD

Mishimoto 15-20 BMW F8X M3/M4 Performance Auxiliary Radiator

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Mishimoto 15-20 BMW F8X M3/M4 Performance Auxiliary Radiator

Mishimoto
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- Pin it
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SKU: MISMMRAD-F80-15A
Barcode: 840197727294

The 2015-2020 BMW F8X M3 and M4 rely on auxiliary radiators mounted low in the front corners of the car... Read more

Out of stock, 1-3 weeks

$494.00 $448.95

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Shipped today? Order within: Aug 08, 2026 16:00:00 -0400

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Description

The 2015-2020 BMW F8X M3 and M4 rely on auxiliary radiators mounted low in the front corners of the car to keep the S55 in its operating window. Under sustained track use and aggressive street driving, the factory units run out of cooling capacity and heat-soak between runs - and their low position leaves them exposed to road debris and the plastic end tanks prone to cracking under repeated heat cycling. The Mishimoto Performance Auxiliary Radiator replaces the stock unit with a larger, fully reinforced aluminum core engineered to add thermal headroom and survive the conditions that retire the OEM part early.----The core carries 9% more volume and 32% more external tube area than stock, rejecting more heat into the airstream when the engine is working hardest. Strutted tubes reinforce the core against the vibration and impacts that fatigue a low-mounted radiator, while removable stone guard shields the exposed face from debris. Aluminum, TIG-welded end tanks replace the failure-prone factory components, and a robust bracket design fits both the driver and passenger-side locations from a single part.----Direct fit for the 2015-2020 BMW F8X M3 and M4 - installs in the factory auxiliary radiator location with no cutting, fabricating, or adapter work required. Backed by the Mishimoto Lifetime Warranty.

This Part Fits:

Year	Make	Model	Submodel
2019-2021	BMW	M2	Competition
2020	BMW	M2	CS
2015-2018	BMW	M3	Base
2015-2020	BMW	M4	Base
2019-2020	BMW	M4	CS
2016	BMW	M4	GTS

Specifications

Type: Aftermarket
Usage: Street Use & Speedway

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Returns & Delivery

When will my order be delivered?

Delivery typically takes 1–4 business days. After placing your order, you will receive an email with shipping updates, tracking information, and any additional details needed to ensure a smooth delivery process.

Can I return my product?

Orders may be returned or exchanged within 15 days of receiving the parcel, provided the items are in their original, resalable condition. Customers are responsible for return shipping costs unless the return is due to an error made by Gearhead Motoring, in which case we will cover all shipping costs. Please wait for an RMA number and return instructions before sending any item back. Items returned without an RMA will not be accepted.

What can I do if my item (or part of it) is damaged?

Damaged Shipments

If your shipment arrives damaged, whether visible upon delivery or discovered after opening the package, please follow these steps immediately:

Contact Gearhead Motoring as soon as possible and submit a damage claim at shipping@gearheadmotoring.com
Keep all original packaging materials, including the box and packing materials.
Make a list of any damaged or missing items.
Take clear photos of the damaged packaging and the affected products.
If the delivery driver cannot wait for an inspection, or does not allow you to inspect the shipment, write "SUBJECT TO INSPECTION" on the delivery receipt before signing and ask the driver to acknowledge it.

Once we receive the required information, Gearhead Motoring will work directly with the shipping carrier and arrange a pickup if necessary. Do not return any merchandise without prior written authorization and an RMA number from Gearhead Motoring.

After the returned product is received and inspected, we will notify you whether the item will be replaced, or if a refund or store credit will be issued.

Important: By signing and accepting a freight shipment, you may waive your right to file a damage claim for any damage not noted on the delivery receipt. We strongly recommend inspecting all freight shipments upon arrival, even if the outer packaging appears to be in good condition.