M133 Auxiliary Heat Exchanger Upgrade – CLA45 AMG / GLA45 AMG

Looking to reduce heat soak and maintain consistent performance from your AMG? This auxiliary heat exchanger is designed to supplement the factory cooling system on the CLA45 and GLA45 AMG, helping stabilize intake air temperatures under sustained load.

Engineered specifically for the M133 2.0L turbocharged engine, this auxiliary unit increases overall cooling capacity to support spirited driving, hot climates, and tuned setups where the stock system can struggle.

Rather than replacing the primary front cooling system, this exchanger works in parallel to reduce thermal saturation—keeping power delivery more consistent during repeated pulls or aggressive driving.

Why Add an Auxiliary Heat Exchanger?

• Reduces Heat Soak: Helps prevent intake temperatures from climbing during repeated use
• Supports Tuned Vehicles: Provides additional cooling headroom for Stage 1/2 setups
• Efficient Core Design: Furnace-brazed, non-epoxied core for reliable heat dissipation
• Billet End Tanks: CNC-machined aluminum tanks for strength and long-term durability
• Direct Bolt-On: Designed to fit factory mounting locations with no cutting or modification
• Track-Tested: Proven effective in both aggressive street driving and track conditions

Vehicle Compatibility

• Mercedes-AMG CLA45 — 2014–2019 (M133)
• Mercedes-AMG GLA45 — 2015–2020 (M133)

This auxiliary heat exchanger is ideal for owners who want improved temperature stability without replacing the factory front heat exchanger. For maximum cooling performance, it can be paired with a front-mount upgrade as part of a complete cooling solution.