Ford Focus Mk3 Battery Replacement & BMS Reset

#focusmk3 #bms #carbattery
In this video I replace my battery on my Mk3 focus and reset the BMS.
Not resetting the BMS after replacing the battery can have some weird affects.
Please leave any comments etc down below.

*Ebay Affiliate Link(s)
Battery used same as this

[LissetNovachec]

Thanks, got another task today this was an informative and perfect video.Appreciate the time you took to put this together .Please Ford stop making your parts a pain to change.its not mechanno.

[martindewhurst]

Brilliant video! Thanks very much! Just wish I had seen it before buying a new battery!! Recently got a Focus MK3. Next day "Low battery warning" showing when starting. Being a used car I immediately went to replace the battery as I had no idea as to how old it was. New battery in. Same warning. Google search and found your video. Now all is OK! Thanks again! (With hindsight I should have searched Google first and saved myself £90 for the new battery. Lesson learned!)

[markperry]

Great video pal but there’s no need to remove that air box or anything else just unclip the front plastic clips and disconnect the battery as you did and it will slide out on a angle 👍🏼I done mine yesterday

[lordhooper]

Cheers mate. Really helpful about the BMS bit, as mine does and I had no idea! 👍

[reminiz]

In the states is different you will have to turn on the ignition then you will have to turn the light on (do not leave it on Auto lights), you have 10 sec to flash your bright lights five times then you have to press the brakes three times and wait about 20 seconds until the battery light flashes about three times then your BMS is set

[bollxd]

Great advice thanks my car went flat when left on hols, put a new battery on as it was 8 years old, it was great for a few weeks then wouldn't switch off? Was losing power, would not open, alarm going off at 3am. I also cleaned the earth connector near the battery noticed it was painted over by Ford? Cars great now thanks 😊

[anthonys]

Looks like you forgot to remove the little red transport plugs out of the side of your battery. See one at 3:40
Good straight forward instructions on the reset :)

[Robert...]

This small stuff with the small wires at the negative battery is not a BMS, It an explosive which cut the power from the car works together with the airbags. If you don't have this thing on an MK3 Ford that's probably means the airbags were open due to an accident, and after thatdoes not repaired well, beacus of cost saving.

[paulhartwell]

Thanks I’ve just done a battery swop and did not know about this feature. I have low fuel light on with plenty of fuel registered on the gauge I hope what you demonstrated will cure this? Where did learn about the reset? Cheers. .

[broken]

If the battery is on its way out the stop start usually stops working.

[grahamgardner]

Just wandering with the reset, if you press the hazard 3 times that would mean the hazards would stay on??
Or are you pressing 6 times
Thanks

[markmoore]

The original battery lasted well, thankfully my Focus had a battery before I bought it so that's once less job. Only issue I have is with the car taking an absolute age to get warm and even then the temperature guage goes up and down more than it should. I've read it could be the impellor on the waterpump? Mines a 2.0tdci like yours, has yours had his issue at all?

[greenleaf]

Hey! What if your car doesn't have rear fog lights? But it has front fog lights.

[jbrovage]

Anyone tell you that you look a LOT like Alex Horne from TaskMaster?

[motologist]

brother i have ford fiesta mk6 1.4 tdci my problem is that whenever i start the car battery warning light comes on the dash but if i fully press the throttle all the way to 5k rpm it starts charging and light goes offf, plz help me to solve this issue . this problem started when i removed the battery