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SpeedBox 1.4 for Bosch SX (Smart System + Rim Magn

Marsoni M251S
Sale price$368.30
Pay 4 payments of $92.08 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
SpeedBox 1.4 for Bosch SX (Smart System + Rim MagnSpeedBox 1. 4 for Bosch Performance Line SX (4th Gen) Simplified installationno need for a separate magnet simulator. Designed for BDU3142 and BDU3143 motors mounted with two top screws. Enables unlimited speed (max 35 km h recommended). Activation via WALK button or + + combination. Tuning status indicated by 3. 5 2. 5 km h display values. Compatible with Bosch Rim Magnet setups only. Not compatible with standard magnets, ABS systems, or SpeedBox
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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.
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4.5 ★★★★★
Based on 1110 reviews
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Verified Purchase
Jim
Alexandria, US
★★★★★ 5
Fits great
Cant go wrong 15.00 what the heck.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 24, 2024
A
Verified Purchase
Amazon Customer
Waukegan, US
★★★★★ 5
BMW GRILLES
As described by the seller
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Reviewed in the United States on January 22, 2026
S
Verified Purchase
Scott
Chelsea, US
★★★★★ 5
easy install
fits well not exact like original but looks great.
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Reviewed in the United States on October 20, 2025
B
Verified Purchase
Bigmac24
Bozeman, US
★★★★★ 5
Works well
Fit well and same as oem
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Reviewed in the United States on April 20, 2026
J
Verified Purchase
James Bonner
Lexington, US
★★★★★ 5
A perfect OEM fit!
I purchased a used 2021 Mule that was missing one of these. This item was a perfect fit and easy to install.
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Reviewed in the United States on August 6, 2024

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