Description
The Mishimoto MMRAD-MK7-15A Performance Auxiliary Heat Exchanger is a direct-fit, aluminum cooling upgrade engineered specifically for the VW/Audi MQB platform, built to replace the factory auxiliary heat exchanger, the DSG cooler, or both at once. Its dual-pass core and louvered-fin design push a 106-percent increase in coolant capacity and a 52-percent increase in core volume over the stock heat exchanger, giving MQB owners real cooling headroom when the pace picks up. A stainless-steel stone guard rides along for the ride, shielding the core from road debris on street or track.
Mishimoto built this Cooling upgrade because MQB platform cars rely on coolant to manage engine temperatures, transmission fluid, and oil all at once, and the stock auxiliary heat exchanger runs out of margin fast once bolt-ons and a tune are added. Acting as both a mishimoto transmission cooler and a mishimoto oil cooler for the DSG system, this unit uses louvered fins to boost fin surface area by 68 percent for better air circulation, while strutted tubes throughout the core keep it durable through repeated heat cycling and rough roads. The dual-pass layout balances flow rate against cooling performance, so whether you’re treating it as a dedicated mishimoto trans cooler or a full mishimoto cooler kit for your MQB build, it’s engineered to help hold coolant, engine oil, and DSG oil temperatures in a safer range for longer stints on track.
Vehicle Applications
This auxiliary heat exchanger is a direct fit for MQB-platform vehicles, including the Volkswagen Golf R (2015–2019 and 2022), Volkswagen GTI (2015–2021), Audi S3 (2015–2020), and Audi TT Quattro and TTS Quattro models (2014–2021). It is designed to bolt in as a replacement for the stock auxiliary heat exchanger and/or the stock DSG cooler on these MQB chassis vehicles.
Features
- 106-percent increase in coolant capacity over the stock heat exchanger
- 52-percent increase in core volume over the stock heat exchanger
- 68-percent increase in fin surface area thanks to louvered fins for improved air circulation
- Dual-pass core design balances flow with cooling performance for maximum efficiency
- Strutted tubes throughout the core add durability through road and track use
- Included stainless-steel stone guard protects the core from road debris
- Can be used to replace one or both of the stock MQB auxiliary heat exchangers
- Helps maintain safer coolant, engine oil, and DSG oil temperatures
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMRAD-MK7-15A
- Core Material: Aluminum
- Core Finish: Uncoated
- Flow Type: Down Flow
- Overall Height: 11.67 in
- Overall Length: 7.87 in
- Overall Width: 4.33 in
- Core Height: 8.5 in
- Core Length: 7.12 in
- Core Thickness: 1.65 in
- Fluid Capacity: 0.1 gal
- Inlet Location: Top Right
- Outlet Location: Top Left
- Transmission Oil Cooler Included: No
- Drain Plug Included: No
- Radiator Cap Included: No
- Includes: Mishimoto Performance Auxiliary Heat Exchanger/DSG Cooler, stainless-steel stone guard, mounting hardware, and the Mishimoto Lifetime Warranty
Frequently Asked Questions
Does the Mishimoto MMRAD-MK7-15A replace both the auxiliary radiator and the DSG cooler?
It can be used to replace one or both of the stock MQB auxiliary heat exchangers, but the price listed is for one heat exchanger. Customers who want to replace both their auxiliary radiator and their DSG cooler need to purchase two units.
Which vehicles does this Mishimoto auxiliary heat exchanger fit?
It fits the Volkswagen Golf R (2015–2019 and 2022), Volkswagen GTI (2015–2021), Audi S3 (2015–2020), and Audi TT Quattro and TTS Quattro models (2014–2021), all MQB platform vehicles.
What is the core made of?
The core is made of aluminum with an uncoated finish.
Does this heat exchanger include a stone guard?
Yes, it includes a stainless-steel stone guard that protects the core against road debris.
Does this product include a transmission oil cooler?
No, a transmission oil cooler is not included with this heat exchanger.
What warranty comes with this Mishimoto heat exchanger?
It is backed by the Mishimoto Lifetime Warranty.
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.
