★★★★★ 5
Love it
Style: Gloss Black Single Slat, Size: E90（2009-2011）
Worked great and looks awesome
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
Fox ECS HV ECM4100, 12.09kWh 1x Master 2x Slave
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Fox ECS HV ECM4100, 12.09kWh 1x Master 2x SlaveThis part is made up of the following items: 2 x Fox Energy Cube 4. 03kWh HV Battery (Slave) 1 x Fox Energy Cube 4. 03kWh HV Battery (Master) Fox Energy Cube 4. 1kWh Stack of 3 (12. 09kWh) Incl. Master ECM4100 4. 03kWh Capacity Scalable to 28. 21kWh 90% Depth of Discharge Wide Temperature Tolerence Easy Installation CAN RS485 Communication High Voltage The quick & easy install feature allows for more ECM4100 battery modules to be added post
Quick Dispatch:
Your Fox ECS HV ECM4100, 12.09kWh 1x Master 2x Slave orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Fox ECS HV ECM4100, 12.09kWh 1x Master 2x Slave ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.2 ★★★★★
Based on 1799 reviews
Sort
Product Reviews
★★★★★ 5
Perfect OEM Fit in Seconds!
Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door, Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door
Perfect OEM Fit in 2 seconds!! I’m surprised and Happy and it looks Perfect on my BMW 2002 330ci
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
★★★★★ 3
Check engine light
Style: Gloss Black Single Slat, Size: G20（2019-2022）, Style: Gloss Black Single Slat, Size: G20（2019-2022）
Looks good but will throw a check engine light on your car. The fitment isn’t perfect causing the adaptive vents to show that they are failing even though they are not
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Quick fix
Style: Gloss Black Single Slat, Size: E46（2002-2005）4-Door
Easily Installed with no modification in under a minute. The finish was a little glossier, then OE.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026
★★★★★ 5
Exact Fit for 2001 BMW 325CI Convertible
Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door, Style: Gloss Black Single Slat, Size: E46（1999-2002）2-Door
Perfect fit for a 2001 BMW 325CI convertible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
