[BimmerLearner]

Got in the car yesterday morning and it had a check coolant level message. I drove to work but planned to call at bmw on the way home. When i got in the car to leave work the error was gone.


I dont see any coolant on my drive but could be wrong - is it possible that its just on the edge and the colder morning caused compression of the water in the coolant? does the 230 have the issue of a possible rock damaged radiator like the 235/40?


The second issue (one week after I can no longer return the car ) is the front right tire has a big bulge in the side wall! i maybe hit a tiny pothole but of course, like my 135 it seems that the tires pop if you look at them wrong.



I switched my 135 to none run flats after paying bmw for 2 expensive replacements but do recall one tore so bad that fix it slime was a no go - do people still suggest replacing RFTs? or just getting a better brand?

[bimmerfile]

My 2016 M235 had a low coolant alert come up about 1 year into ownership (which was 2+ years ago). Apparently not all that uncommon. Topped it off and no repeats since then (my son currently owns it).
So top it off with the overpriced BMW coolant and you'll be good to go.

[AndDown]

This was a current topic on the other board, you're not the only one with this alert:
https://www.bimmerfest.com/forums/sh....php?t=1315253

[Kimmy96]

I checked my coolant yesterday just out of curiosity and had minimal in there. No warning about the level. Topped it up. It's running at 109 degrees c and oil at the same. Is this about right?

[omera60]

BMW has a PuMA measure for it I’m attaching it below;

PuMA measure
B38, B46, B48, B58, XB1H - Check Control message: Top up coolant
63482185-05 - 16/04/19

Complaint:
Check Control message (ID 166): Top up coolant
The coolant level in the coolant expansion tank of the high-temperature coolant circuit is below the minimum.
There may also be traces of coolant in the engine compartment or where the vehicle is parked.

Cause
There are various possible causes:

The cooling system was not sufficiently bled initially. While driving the
cooling system bleeds and as a result the coolant level drops in the coolant expansion tank.

The cooling system is leaking (impermissible coolant loss).
Measure
+++
Revision to the previous version of the PuMA measure:
Note:
Bleeder screw: Observe tightening torque of 2.5 Nm.
+++

In the event of a customer complaint, proceed as follows:

Attention:
Only perform the following work on cooled-down components.

1) Check coolant circuit for watertightness:
See repair Instructions 17 00 009.
Check the high-temperature coolant circuit for watertightness using test for loss of pressure.
Test pressure of cooling system (excess pressure): 1.5 bar
test period: 10 minutes

2) Observe pressure:
No pressure drop: Continue with point 4.
Pressure drop present: Continue with point 3.

3) Search for leak.

Check coolant pump.
The coolant pump has a reservoir. During engine operation the
slide ring seal of the coolant pump needs to be lubricated. The coolant required for lubrication is collected in the
reservoir. Slight traces of coolant could be visible on the lid of the reservoir.

Slight traces of coolant on lid of reservoir (see attachment, figure 1):
Clean the lid. Check if coolant leaks again at the lid if excess pressure of 1.5 bar is applied.
- If coolant is leaking: Replace coolant pump.
- No coolant leaking: Do not replace coolant pump. Search for leak and
repair accordingly.

Excessive traces of coolant on lid of reservoir (see attachment, figure 2 and 3):
Replace coolant pump.

After repairing the leak:
Bleed cooling system and check for watertightness:
See repair Instructions 17 00 039.
Note:
Bleeder screw: Observe tightening torque of 2.5 Nm.

4) Release pressure:
Adjust the filling level in the coolant expansion tank of the high-temperature coolant circuit.
In doing so, it is imperative to follow repair instructions 17 00 039.
The filling level in the coolant expansion tank is adjusted either to the maximum mark or 200 ml above it, depending on the model.

Notes on factory filling of high-temperature coolant circuit:
The initial coolant circuit capacity of the high-temperature coolant circuit was already optimised in the vehicle factories.
The introduction dates are:
F20, F21, F22, F23, F30, F31, F32, F33, F34, F35, F36: 01 September 2017
G11, G12: 5 June 2018
G30, G31, G32: 01 February 2019
G38: as of series launch
Invoicing:
Processing and reimbursement must be conducted according to current warranty conditions.

In case of defective cooling system bleeding, use the following defect code.
Recommended defect code for GWK cases: 17 11 00 72 00

Use the following defect code for a leaking coolant pump.
Recommended defect code for GWK cases: 11 51 07 48 00
For other leakages.
Obtain the corresponding defect code from the "Commercial Service Data (KSD)".
Validity information
Model series:[F30, F21, F32, G31, F31, F20, G30, F23, G11, F34, F33, G32, F22, F36, F35, G12, G38]
Engine range:[B58M, B48M, B46O, B48O, XB1H, B38M]
Body style:[ALL]
Fault codes:[]
Production period:-