11/30/22, 4:46 PM

64 08 22_INOPERATIVE OR IRREGULAR A/C COOLING POWER

SIB 64 08 22
INOPERATIVE OR IRREGULAR A/C COOLING POWER

2022-11-14

MODEL
E-Series
I20
G26

Model Description
iX Sports Activity Vehicle
4 Series Gran Coupe BEV

Production Date
From start of production to
December 6, 2022

SITUATION
The climate control system may be inoperative or perform irregularly. There may be:

Lack of or irregular cooling power or air conditioning
No or poor heater output
Difference between left and right vent temperatures in the passenger area
Interference noises (clattering noise) coming from the electric A/C compressor (EKK)

CAUSE
This may be caused by the air conditioning system not being sufficiently filled, or leaking, or impurities in the
refrigerant circuit.

CORRECTION
Find and repair the leak.
If there is system contamination, flush the system and replace components as listed.

PROCEDURE
A. In the event of a customer complaint, proceed as follows.
1. Heat up the vehicle (temperature in the passenger area at approx. 88º F (~30°C)).
Then press Max AC button and take the following steps.
Read out the temperature value of the evaporator using ISTA.
The path in ISTA is as follows:
Service functions -> Heating and air conditioning functions -> Temperature sensors -> Heating and air
conditioning functions test module: Monitor temperature sensors.
The desired temperature is 46º F (8 °C) or less.
2. Check temperature differential at the ventilation vents.
The difference between left and right should not be greater than 9º F (5º C).
3. Check the suction pressure and high pressure using ISTA
"Temperature Sensor Test Module -> Menu Item -> Show Values"
A suction pressure of 2.5 - 4 bar and a high pressure of 8-18 bar is OK.
4. If one of the above checks deviates from the desired state, proceed as follows.
Check the amount of refrigerant in the refrigerant circuit.
If the system is not sufficiently filled, then check the system for leaks. A detailed pressure
test (recommendation: nitrogen test) must be carried out.
B. If the tests under Section A are not passed and there is a leak, only the leaking components are to be
exchanged.
Check the compressor-capacitor pressure line
for damage.

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11/30/22, 4:46 PM

64 08 22_INOPERATIVE OR IRREGULAR A/C COOLING POWER

Important: If the leaking components include the electric A/C compressor (EKK) and/or the compressorcapacitor pressure line, the following components must be replaced in combination:
Compressor-condenser pressure line
Electric A/C compressor EKK
Air conditioning condenser
Non-return valve (in intake pipe)
Electrical expansion valve (at the evaporator)
Cooling unit (referred to as a chiller in the EPC)
Then refill the system and check again for leaks.
C. If the tests under Section A are not passed and there is no leakage, the refrigerant circuit must be
checked for dirt.
If the refrigerant oil is black or chips are visible, flush the system and then replace the following components:
Compressor-condenser pressure line
Electric A/C compressor EKK
Air conditioning condenser
Non-return valve (in intake pipe)

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11/30/22, 4:46 PM

64 08 22_INOPERATIVE OR IRREGULAR A/C COOLING POWER

Electrical expansion valve (at the evaporator)
Cooling unit (referred to as a chiller in the EPC)
D. To avoid repeat repairs due to deposits from components that have not been exchanged, flushing the
refrigerant circuit is strongly recommended.
If an A/C service station with the "Flush refrigerant circuit" function is available, the refrigerant circuit must
be flushed.
Follow the repair instructions "Flush the refrigerant circuit (A/C compressor, air conditioning condenser and
heat pump exchanger removed) 64 50 770 “REP-REP-P-6450770-I20 - V.3".
Important: If flushing is to be carried out, the components are replaced only after flushing.
Then reassess the vehicle.

PARTS INFORMATION
Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either ETK
or AIR which considers specific equipment and/or options.

CLAIM INFORMATION
This Service Information bulletin provides technical and repair-related information.
Damage and/or issues caused by outside influences are not covered under the BMW limited warranties.
Eligible and Covered Work/Repairs
When used to repair a verified defect in materials or workmanship, the information provided in this bulletin is
covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.
To submit a claim, please follow the established and applicable warranty policy and procedures
(Labor/Part/Sublet) that apply to the repair being performed.
Refer to AIR for the corresponding Defect Code, flat rate labor operations (including the diagnosis that
applies*) and the flat rate unit (FRU) allowances.
Only one Main labor operation code can be claimed per repair visit.
*Based on which one applies to your center, please refer to SI B01 01 20 or B01 07 20 for the applicable
procedure for documenting, claiming, and explaining, on the RO and in the claim comments, your diagnosis
work time (WT), job/repair work time (WT), and the vehicle repairs your center performed, unless otherwise
required by State law.

FEEDBACK REGARDING THIS BULLETIN
Technical Feedback
Warranty Feedback
Parts Feedback

To submit feedback for the technical topics of this bulletin: Submit your
feedback in the rating box at the top of this bulletin
To submit feedback for the CLAIMS section of this bulletin: Submit an IDS
ticket to the Warranty Department, or use the chat available in the Warranty
Documentation Portal
To submit feedback for the PARTS section of this bulletin: Submit an IDS
ticket to the Parts Department

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