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Question on coolant, TPMS

Posted: Wed May 15, 2019 9:31 am
by Srivenkat
Hi All,

For those that use a separate winter wheel set, is the i3 capable of storing 8 TPMS (Summer/AS + Winter) or do they need to be reset everytime the wheels are swapped?

Also, does the i3 have coolant for any inverters and such and if so is there a change interval.

How about any transmission oil for the "singe gear" transmission?

Thanks in advance.

Re: Question on coolant, TPMS

Posted: Thu May 16, 2019 4:37 am
by Srivenkat
Bumping up since this seems to have been submerged in recent spam.

Re: Question on coolant, TPMS

Posted: Thu May 16, 2019 8:38 am
by tjburbach
I don't think the i3 will store all the TPMS sensors, however there is an initialization procedure that can be started from the iDrive menu.

3.3.6. Initializing the tire pressure monitoring system (TPMS)
The TPMS is initialized via the iDrive menu.
The tire pressures must be initialized if:
• The tire pressures have been changed
• A tire change has been carried out
• The tire pressure sensor has been changed.

http://bmwtech.info/BMW%20I3/04%20I01%2 ... ension.pdf

Re: Question on coolant, TPMS

Posted: Thu May 16, 2019 9:10 pm
by MagicCarpet
I looked up the fluid specs and they have changed over the years
The 2 front coolant systems
The heater circuit coolant is not mixable with any other, only "i3 coolant" BMW part 83512355296, blue, silica free, previously green.
Electric machine = BMW G48, blue, nitrite & amine free, mixable or replaceable with: Castrol Radiocool NF or BMW 82192 211 913 or 194 or HT12
REX coolant in rear = same as E.M. as above.
REX W20 engine oil = 5W30 SJ spec eg. Castrol EDGE A3B4 change interval 10,000 mi / 24 month or by E-schedule warning - depends on car option code
REX oil filter = 517504-10 (Mahle OG306)
I've not seen anything on the transmission oil

Re: Question on coolant, TPMS

Posted: Fri May 17, 2019 9:31 am
by tjburbach
Here is a link to the procedure to change the transmission oil and a link to the oil type.

Re: Question on coolant, TPMS

Posted: Fri May 17, 2019 10:02 am
by Srivenkat
Thanks for the info. Changing transmission oil seems like a pretty complex process which makes me wonder if it's lifetime. Is the coolant lifetime as well?

Re: Question on coolant, TPMS

Posted: Fri May 17, 2019 12:34 pm
by alohart
Srivenkat wrote:
Fri May 17, 2019 10:02 am
Changing transmission oil seems like a pretty complex process which makes me wonder if it's lifetime. Is the coolant lifetime as well?
From the Owner's Manual:

"Sensors and special algorithms take into account the driving conditions of your vehicle. Based on this, Condition Based Service recognizes the maintenance requirements.

The system makes it possible to adapt the amount of maintenance corresponding to your user profile.

Detailed information on service requirements can be displayed on the Control Display."

With no synchronizers in the transmission to wear and no extreme heat being transferred from a hot ICE to the transmission oil, the transmission oil should last a long time. i3 drivers who drive a lot might eventually see a "change transmission oil" message displayed on the Control Display.

Unlike ICE coolant that is exposed to high heat and potentially to combustion products, the climate control and drive coolants should last a long time. The REx engine has a third cooling system whose coolant might need more often replacement, probably depending on how much the REx engine is used. A Control Display message will probably be displayed when any of these coolants need to be changed.

In our BEV that isn't driven much, I expect to never change the transmission oil and coolants.

Re: Question on coolant, TPMS

Posted: Tue May 21, 2019 7:23 pm
by jadnashuanh
You need to do a TPMS reset each time you swap or move tires around on the vehicle. Once you start the process, a bar graph will display as you drive giving you an indication of how far that reset process has progressed. Depending on how you're driving (it can't do anything while you're stopped), that could take a couple of minutes or maybe as much as 10 or so.

The menu is under (I think) vehicle status, and is easy to implement.