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64 04 20_BUZZING NOISE IS HEARD WHEN AIR CONDITIONING IS DEACTIVATED

SIB 64 04 20
BUZZING NOISE IS HEARD WHEN AIR CONDITIONING IS
DEACTIVATED

2020-10-14

MODEL
E-Series
F39
F48

Model Description
X2 Sports Activity Coupe
X1 Sports Activity Vehicle

Production Date
From January 1, 2018
production

SITUATION
A buzzing noise is heard when the air conditioning (A/C) is deactivated while the vehicle is in park or
neutral. Prior to turning off the A/C, the system was functional and cooling properly.

CAUSE
A/C compressor, or
The power supply to the A/C compressor is too low

CORRECTION
Replace either the A/C compressor, or the vehicle’s main battery.

PROCEDURE
1. Start the vehicle. Leave stationary in Park (secure the emergency brake), with the engine idling.
2. Turn on the A/C system for 1 minute.
NOTE: If the A/C system is not functional at this moment, then A/C system diagnosis must be
performed before this bulletin would apply.
3. Turn off A/C system, then increase engine speed to 1000 RPM.
4. Is there an abnormal noise heard, vibration felt, when A/C is turned off that increased as engine RPM
increased? (NOTE- a vibration may also be felt in the low-pressure A/C pipe that increased with
engine RPM)
No - This bulletin does not apply.
Yes - Proceed with testing A/C compressor power supply
5. With the air conditioning turned off, check the power supply to the A/C compressor using a non-invasive
clip-on current measurement probe.
If power supply to A/C compressor is below 260 mA (milliamps) --> Replace vehicle main battery.
Run ISTA test plan for battery registration.
Note: If the vehicle arrives with a discharged battery, perform the standard troubleshooting along with
the Energy Diagnosis to determine the cause of the discharged battery.
If power supply to A/C compressor is above 260 mA --> Replace A/C compressor.
When compressor is removed check for debris in system.
Perform compressor run in test plan
6. Retest to ensure noise is eliminated.

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64 04 20_BUZZING NOISE IS HEARD WHEN AIR CONDITIONING IS DEACTIVATED

PARTS INFORMATION
Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either ETK
or AIR which takes into account specific equipment and/or options.
Part Number
Refer to ETK
83 19 2 446 563
83 19 2 468 442
Or:
Refer to ETK

Description
Air conditioning compressor
Refrigerant R1234yf (1 oz unit)
Coolant (1 gallon)

Quantity
1
Qty if/as needed
Qty if/as needed

Battery

1

Additionally, other small parts that are not specified above, such as one-time screws, nuts and seals, which
must be replaced according to the ISTA repair instructions/ETK, must be selected from the Electronic Parts
Catalogue according to the respective vehicle type and invoiced under the corresponding repair defect code
that applies.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.
Defect Code:
:
Labor
Operation
64 50 010

6452003900

Air conditioning compressor (mechanical/electrical)
disruptive noises

Description

Labor Allowance

Extract, evacuate and fill air conditioning system
(Automatic climate control) (Main work)

Refer to AIR

Extract, evacuate and fill air conditioning system
(Automatic climate control) (Plus work)

Refer to AIR

Extract, evacuate and fill air conditioning system (Basic)
(Main work)

Refer to AIR

Extract, evacuate and fill air conditioning system (Basic)
(Plus work)

Refer to AIR

Using the non-invasive clip-on current measurement
probe to check the power supply to air conditioning
compressor

2 FRU

Replacing air conditioning compressor for conditioning
system (Automatic climate control)

Refer to AIR

Replacing air conditioning compressor (Basic)

Refer to AIR

Or:
64 50 510
Or:
64 50 009
Or:
64 50 509
And:
64 99 000
And:
64 52 523
Or:
64 52 521

If you are using a Main labor code for another repair, use the Plus code labor operation 64 50 510/64 50 509
instead of 64 50 010/64 50 009.
And, as needed:
Sublet – Bulk Materials (RO and Claim Comments Required)
Sublet Code See the sublet

Reimbursement for the repair-related bulk materials (Do not

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64 04 20_BUZZING NOISE IS HEARD WHEN AIR CONDITIONING IS DEACTIVATED

reimbursement
calculations below

use the BMW part numbers for claim submission)

Sublet reimbursement calculation for claiming the applicable repair-related bulk materials (BMW part
numbers) is at the dealer net price amount for the quantities used plus your center’s handling.
BMW Antifreeze/Coolant: Claim the corresponding sublet dollar amount for the quantity needed to replace
what was drained with a 50/50 coolant/water solution.
Enter this material cost in sublet and itemize the amount on the repair order and in claim comment section.
Or:
Defect Code:
:
Labor
Operation
61 21 017

6121001200

Vehicle battery (12 V battery) permanently failed

Description

Labor Allowance

Replacing vehicle electrical system battery - including
registering battery replacement (Main work)

Refer to AIR

Replacing vehicle electrical system battery - including
registering battery replacement (Plus work)

Refer to AIR

Using the non-invasive clip-on current measurement
probe to check the power supply to air conditioning
compressor

2 FRU

Or:
61 21 517
And:
64 99 000

If you are using a Main labor code for another repair, use the Plus code labor operation 61 21 517 instead of
61 21 017.
Refer to AIR for the corresponding flat rate unit (FRU) allowances.
Work time labor operation code 64 99 000 is not considered a Main labor operation.
As applicable to your center, please refer to SI B01 01 20 or B01 07 20 for claiming your diagnosis work
time, job/repair work time (WT), WT and the repair-related explanation procedures.

QUESTIONS REGARDING THIS BULLETIN
Technical inquiries
Warranty inquiries
Parts inquiries

Submit feedback at the top of this bulletin
Submit an IDS ticket to the Warranty Department or use
the chat available in the Warranty Documentation Portal
Submit an IDS ticket to the Parts Department

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