Bosch Motor Derestriction

[Deleted member 4366]

No need for dongles to derestrict the latest Bosch Performance CX systems. The trick with a magnet on the inside of the pedal and the sensor turned around and moved up the chainstay works again. The only problem is that your speed display is related to your cadence instead of speed.

This video shows what to do. It's in German, but all you need is the pictures. I wouldn't use such a big magnet. A thinner one would be better as long as it's strong enough to work the sensor. Thin ones stack together, so you can add them in until it's strong enough.

 

[nemesis]

It doesn`t work,well to be honest it does for about 10 seconds then shuts down in error mode,i have tried it on the CX Bosch 2016 and 2017 model motors.

 

[STEVEMANFA]

Not a lot of help but they do say it works fab on the Yamaha drive

 

[chris_n]

It's fine on my 2016 Yamaha. Can't see why I would need to spend money on a dongle when I use my phone to log everything from heart rate to speed anyway, just put it on the bars wherevyou can see it.

 

[Earthskyouch20]

Anyone done this long term, off road? Any problems snagging sensor wire or losing the magnet? Cheers

 

[chris_n]

Over a year for me, the magnet is epoxied into the end of the pedal where the hex for the allen key is. No problems.

 

[Earthskyouch20]

Over a year for me, the magnet is epoxied into the end of the pedal where the hex for the allen key is. No problems.

So what if you need to tighten or change pedal..?

 

[chris_n]

The diameter of the magnet is smaller than the threads. A normal pedal spanner is used to tighten the pedals.

 

[STEVEMANFA]

Chris
How have you held the sensor on?

 

[chris_n]

The sensor is held on with a tight fitting neoprene chainstay protector. If I remember correctly there may be a tywrap under there as well.
To be honest I don't know why I have left it like that, where I usually ride it is of little use as it is usually 10% + up or down so 25kmh isn't applicable in either case.

 

[STEVEMANFA]

Ok thanks for the info