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Ignitions and Electrical› Computers, Chips, Modules and Programmers

RENNtech

ECU Upgrade

$1,195.00 $995.00 Save $200.00

SKU: 54.211.E320CDI

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Overview

The RENNtech ECU Upgrade is a performance software upgrade for the Mercedes-Benz E 320 BlueTec W211. This upgrade unleashes the vehicle's true potential, offering significant performance gains while maintaining daily driver reliability.
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The RENNtech ECU Upgrade is a proprietary performance software designed to significantly enhance the power and torque of your Mercedes-Benz E 320 BlueTec W211. With years of research and development, RENNtech ensures substantial performance gains without compromising the reliability of your daily driver. This upgrade targets ignition timing, throttle mapping, air/fuel ratios, and boost mapping for turbocharged engines to unlock your vehicle's full potential. This ECU upgrade takes the stock 230 HP and 389 LB-FT of torque and boosts it to an impressive 253 HP and 464 LB-FT. The software modification provides gains across the entire power band, resulting in a more responsive and powerful driving experience. The RENNtech ECU upgrade is specifically designed for the W211 E 320 BlueTec models from MY2007-2009. Installation involves reprogramming the ECU to integrate the performance enhancements.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRENNtech
Part Number54.211.E320CDI
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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