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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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4.9 ★★★★★
Based on 702 reviews
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Verified Purchase
J. Simpson
Bozeman, US
★★★★★ 1
buy from Eufy only for reliable fit.
vacuum bag doesn't fit correctly and the vacuum doesn't register it and won't work with it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
S
Verified Purchase
Shirley Hall
Grantham, US
★★★★★ 5
Vacuum
Came as advertised
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Reviewed in the United States on February 24, 2026
F
Verified Purchase
Frank X Kunz Jr
Cuba, US
★★★★★ 3
not used
package came as expected everything looks good have had a chance to use it yet. thats why no rating..
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Reviewed in the United States on May 13, 2026
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Verified Purchase
dawn swiney crowe
Whiting, US
★★★★★ 5
Top notch price buster
Size: 11SMax-24Pack
Perfect fit, Perfect quality replacement and great deal!!!
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Reviewed in the United States on April 25, 2026
J
Verified Purchase
Jon J Ceresa
Phoenix, US
★★★★★ 5
Fits perfectly on my Dyson.
Size: 11SMax-24Pack
Fit perfectly. Work great. Improves your suction and cleaning power back to new. Good price. Fast shipping.
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Reviewed in the United States on January 28, 2026

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