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RENNtech Power Module ECU | AMG 45 | M139 | Up To 490 HP and 398 LB-FT (S-model) | 2.0 L Turbo

ECU+ Upgrade | Up to 456 HP / 384 LB-FT | Gains: +68 HP & +30 LB-FT
A 45 / GLA 45 / CLA 45
SKU: 54.139.RPM.45
Renntech Piggyback ECU Tuner Renntech Piggyback ECU Tuner
Retail price without tax: $2,580.00
Renntech Piggyback ECU Tuner
Renntech Piggyback ECU Tuner
Renntech Piggyback ECU Tuner

The RENNtech Power Module (RPM) ECU tune delivers significant horsepower and torque gains across the entire power band. By modifying ignition timing and throttle mapping, optimizing air-to-fuel ratios, and modifying boost mapping for turbo-chargers the Mercedes-AMG 45 M139 -engine gains up to +69 HP and +30 LB-FT, based on Dyno measured power figures.


The RENNtech Power Module is contained in a CNC machined 6061 aluminum enclosure with pre-labeled wires and connectors. The RPM module comes with a bypass that can be installed in place of the module to quickly turn the vehicle back to stock performance. The harness can be uninstalled to return the vehicle to stock completely. Through our 30+ years of ECU tuning experience, countless hours of in-house research, development and long-term testing ensure that our ECU upgrade offers the best in quality, performance and reliability.

Power AMG 45:

Stock: 382 HPand 354 LB-FT
RPM Tuned: 456 HP and 384 TQ | GAINS: 69 HP & 30 LB-FT

Power AMG 45 S:
Stock: 421 HPand 368 LB-FT
RPM Tuned: 490 HP and 398 TQ | GAINS: 69HP & 30 LB FT

The RENNtech Power Module for Mercedes-AMG M139 -engines:

  • A 45 AMG (X247 -chassis)
  • GLA 45 AMG (H247 -chassis)
  • CLA 45 AMG (V177 and W177 -chassis)

Professional installation is recommended. 



Contact us

7825 SW Ellipse Way, Stuart, FL 34997
(+1) 561 - 845 7888
Mon - Fri 9am - 6pm


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7825 SW Ellipse Way - Stuart, FL 34997
TEL: 561.845.7888 FAX: 561.845.6777 E-MAIL: