Super informative as usual, the highlight being the sentence, "This little bad boy has got us out of the shit loads of times"! 😂😂

PCB motherboard repair.

As usual, brilliant videos. Thank you Dave, gald to see you back.🎉😊

Would send it off to ebike motor centre as recently shown on EMTB fix motors at fraction of the cost of the new

Glad to see you back, we’ve missed your videos.🇦🇺

Good to see you back on KZfaq Dave. Great vid 👍

Great video dave ,glad to see you back, 👍 🤘

Great video thanks! Was hoping to see you crack open the motor but still very informative.

Warms me to see you back.

Excellent video

How about starting by spraying contact cleaner on the connector. Then as the PCB responds to diagnostic normally, the controller is probably not dead, then it's just a wiring issue. Probably checking the soldering of the connector would solve this.

Great video

Great video thanks. could you please do a video on replacing bosch gen 4 bearing protection ring service kit, the outer seals. and re greasing . many thanks

You forgot to check the connectors on the Motor itself, could just be a tiny bit of corrosion :D Nice Video tho, always enjoy watching a Master at work :D

I was thinking whether it worth taking the PCB Out and using some PCB Conformal Coatings on it to completely seal it from the elements

Top diagnostic report and accessing the problem dave, I work on cars and run a diagnostic report on every car i touch before I remove anything for insurance purposes, it alone can take up to 20 mins on expensive Mercedes. But without the firmware your trying new components like you did, which is impossible on numerous vehicles, good to see you have new bosch parts at the workshop you can change, do you have shimano new parts too? And brose, you definitely need brose if you get my drift!

A good example of how experience can sometimes trump the computer diagnostics to identify the culprit 👊🏿 Good methodical thinking will always identify and rectify ebike issues. Keep up the vids Dave and stay safe👍🏿

Good video top bloke thank you lee

just take the motor apart and fix the connection why pay for a new motor thats crazy

Excellent video, thank you - just a shame internal components are not available seperately especially the main board to save binning the rest of a pobabaly a perfectly usable motor. (just my eco friendly & repair/reuse ethos)

When this happens om the older power tubes with the green leds fit the battery back to bike and power it on from the battery button itself it should over ride the fault in 90% of cases! Seen people doing this a few time's with the older non smart system! A very important step that has not been done here that could save alot time and money!

Dear dave you are the biggest expert of all bike's i am sure you fix it. At no problem. Great to see you again.❤

Is there a diagnostic socket for an impulse 2.0 motor when to fault find no pedal assist pedal torque sensor?

Great video Dave, would on of these ebike motor repairs services be able to fix it??

Bosch dealer only diagnostics unlike Bafang which is a much easier and cheaper motor to repair and diagnose faults and spares are readily available..

Many thanks! I was afraid that you’d solve this before showing us the Bosch software diagnostic, LOL. Will we see rebuilt motors in the future as a fourth option?

Nice presentation. As a technician I would surely open the motor and inspect for damage before paying for a new one. If there's no warranty, then there's nothing to lose, right?

Any issues with chainring locknut on Bosch gen4 coming loose? Having that problem, tightened to specific torque too.

Looks like the PCB issue, most probably from the moisture ingress / condensation (what else)? AFAIK this PCB is not moisture protected. IMHO this is criminal that they do not do it in the factory. It would cost them a quid. Looks to me like a planned obsolescence of the product. What about all these eco / sustainability claims?

I would have cleaned all the connectors on the cables and ports on the motor with contact cleaner. Since its already out of warranty I would open the motor up and look at the circuit board inside to see if water / mud got in there and clean it. A lot of times the board can short or be rendered inoperable due to mud contamination from use or high pressure cleaning.

There a refurbishment motor shop in the UK take your old broken motor as px exchange hell get a fully rebuild on from them for £250! They have just been on a walk round video on a bike channel

Touch Wood 🤞 my 2018 Canyon Spectral On Shimano E8000 motor has been faultless, over 2400km and lots of winter riding ( bikes well looked after and maintained) In you honest opinion who makes the most relatable motor? Also what about sending the motor for repairs to one of two companies that now repairs ebike motors and do exchange motors also.

I spend enough maintaining my normal mtb, I don't think I could justify the purchase and maintenance costs of an ebike. Every emtb I know of (several friends have them) have required new motors under warranty.

I personally find it shocking how bosch get away with fitting these motors to mountain bikes knowing they can't cope with crappy conditions. My bike is 6 month old and in the shop for it's 3rd motor already. It's an absolute joke.

I've just had my gen 4 fail after 3 1/2 years and 5.5k miles of mainly off road trails and being carefully ridden where water was concerned IE no riding thru very deep puddles or stream crossings swamping the motor altho it's been ridden a lot in the lakes on wet shitty days and wet trails , no power washing and careful cleaning, with a hose and brushes etc the fault was it just kept turning on for a few seconds and then not recognising the battery and turning off within a few seconds , I checked all continuity of the wiring and tried a known purion plugged directly into the drive unit eliminating the kiox i have on , I have two batteries available so i tried the second battery too, and even with the purion plugged into the drive unit and pressing the battery indicator it wouldn't wake the unit up using either battery , I hard reset both batteries just to eliminate that possiblity , I'm pretty good at diagnostics and by that point I had checked everything i could without being plugged into the diagnostic software. I narrowed it down to the pcb at this point. So knowing I'm out of warranty I opened the motor up carefully expecting to see water damage only to find not a sign of any water ingress or visible damage to any of the internal components or the PCB all connectors were good and had been treated to dialectric grease in my early days of owning the bike , all the bearings felt smooth too , so at this point I carefully reassembled the drive unit and took it back to my local supplying dealer to let them see if their software could identify the problem, Im the original owner and asked them to see what they could find as basically I could do no more myself other than just buy a new motor, As soon as they plugged it in they couldn't read any data at all the software couldn't connect so basically they then declared the motor dead.. So using your advice I asked them to reach out to Bosch and put a service report in . Three days later Bosch have come back and offered me a new motor at 50 % discount, now I'm just waiting for the new drive unit to arrive at the shop and get it fitted so like you say Dave it's always worth a try, other than that I had a dead bike, not a cheap fix but a damned sight cheaper than it could have ended up , I also asked them to tell Bosch i have literally just bought another new Whyte with the smart system gen 4 directly before my other bike failed ( sods law ) , I dont know whether that helped sway Bosch but a 50% discount is certainly way better than a bog off your out of warranty . Thanks for your advice Dave

Same case on my e-bike. Worst possible scenario 🫣🫨 + My has obvious internal ratchet teardown after 5000-6000km. Cranks just go round and round 😅

You mentioned some "fix-the-issue" solutions but there's one more - fix it. I was thinking you offer that? There are some companies in uk fixing e-bike motors, potentially way cheaper than the new one.

Had a cube ebike for 3 years. 2 motors. Had the 2nd rebuilt for £360 and sold the bike. Bosch are s--t. Went back to analogue. Right to repair laws need addressing in the uk.

It is not the motor ... it is the controller electronics in the motor housing

Brilliant video! Can the motor not be repaired via a third party? As a option?

Morning dave, just caught ya before we go out on mtb.

The most common repair I encounter is ''burned motors'' with shunt modded controllers... Burned controller comes second.

5v powerrail try put a battery bank on the purion the mine worked after that🎉only can start the bike with a powerbank

My Raleigh Stow E Way purchased in June 2023 went back to /Halfords on the 17 December New Pedal crank Sensor fitted on 17th January February 15th Back to halfords and its been in since They haven't got a clue about the tranzx diagnostic programme May well be going to small claims court to get it resolved I told them to change each piece over one at a time to eliminate which compenent is faulty they just don't listen I watched that closely to see how a proper technician fault finds . Any tips on what the issue is ?

Hello. missed the guy with the accent. Pretty sure the motor itself can be repaired. I can feel my fingers wanting to crack it open to figure it out whats wrong. Rule of the thumb, if its not followed by a catastrophic failure, usually the power reșated issues are the easiest to faultfind. Im surprised the video was not starting with a connections schematic for the bike. Also, I would NEVER fit new parts to a faulty scenario without assessing the full schematic because they can get damaged too, and that would not be fun. Dave, it seems to me you need a guy who can repair electronics, as good as you are with mechanics. Cheers.

Why not take the motor aparat and take a look at it? Or as a Bosch dealer you're allowed to just swap the whole unit?

I have a 5 year old Cube Hybrid. It's done 6,250 miles with no problems at all with the electrics. Not even the display battery! Have I been lucky so far or what!

Surely the motor can be serviceable if not from Bosch from a third party company. If there is a PCB inside the motor, can't this be replaced or repaired?

Another high quality Bosch product...... Investigate motor repair rather than paying for an expensive replacement...

Do you know why an error code appears every time I flat land jumps at a high speed? Accelerator Sensor error on my Bosch CX Performance Gen 4?

How much do you charge for system diagnostics as shown here?

Something else to look forward to going wrong on my useless money pit ebike 😔

Off to the ebike motor centre then?

Dry joint on PCB?

is this not a rare event with bosch ? i haven't heard of many failures from Bosch .

so what is wrong with the motor?

Death on 1300 miles ...nice...😢

So, how long do the manufacturers guarantee the components and the bike in general ?

im going to avoid water from now on

None of test applies in South Africa. Bosch made me buy a new motor, no discount, no sympathy

Na super, statt die Fehler zu analysieren, mittels Software Update alle Evidenz zerstört, Dr. Watson 😂.

Options are, the canal.😂

Shouldn’t bosh dealers be trained to strip the motor and replace parts of it like the electronics board , I don’t own a bosh bike , the one I’ve done 1.5k miles on is a Chinese bike that would only cost £800 to replace but it’s been everywhere that my mates electric Trek rail has been and most of that pulling a loaded trailer , his first service cost him £500 for parts and the service cost , it’s a dear do by the sound of it , all the parts for mine are available within eight days with only the 23AH battery and the hub motor wheel being expensive but nowhere near bosh prices .

:(((

You can get this motor fix for $250

yamaha motors are way better then bosch just saying

I bought a second hand motor (bosch cx) off e bay for £100,guy didnt know if it was good or not,it was in good condition,so i rebuilt it with all new bearings,had it tested by my LBS bingo,new motor to swap when mine goes wrong.

Back for good👍🏻😎I am excited which option the customer chooses. Please let us all know. Cheers for now🙂👋🏻

The lesson learned here is don't buy a Bosch powered bike because they don't allow the end user to buy tools to repair their own property.

Brilliant video! Can the motor not be repaired via a third party? As a option?