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Technical Service Bulletin Transaction No: 2024323/13
91 Parking assistance provides false warnings Release date: Mar 17, 2026
Condition
All Audi Vehicles | 2007 - 2026 Not applicable
REVISION HISTORY
Jrevson [ome [rupee
is | Revised header (Added models, updated market visibility)
12 03/02/2026 | Revised header (Added Model Years)
Revised Condition (Added model table)
1 11/26/2024 | Revised header (Added model years and models)
Revised Service (updated verbiage)
Revised Warranty (updated warranty table)
Customer States:
Parking aid does not work / warning is issued although there is no obstacle
Technical Background
Various factors can lead to functional issues with the parking aid system
Production Solution
Not applicable.
Service
Various environmental conditions can cause false activations to be seen by the customer. In cases where the customer is reporting several false activations (parking aid
warning is displayed however nothing is around) the below environmental and vehicle contributors should be checked.
The following test procedure must be performed to determine the cause of the issue:
Before performing any repairs, ask the customer about the following points (checklist attached):
Environmental Conditions
1. Plants growing to certain heights, and curbs can lead to incorrect warnings being issued in the vicinity of the vehicle
2. Gravel Tracks, cobblestones, potholes, cattle grids, sharp bends in the road, and slopes can lead to incorrect warnings being issued.
3. Various types of weather/ambient conditions can lead to functional issues:
+ Water on the parking aid senders (widening of the radiation pattern)
+ Ice/snow on the parking aid senders or in transition to the bumper.
+ Vehicle exhaust gases and water vapor (bursts of heat caused by rewving the engine) alter the physical property of the air needed to transport the ultrasound of the
parking aid system.
+ Noise disturbance (pneumatic brakes of heavy goods vehicles, anti-rodent devices, or other active ultrasound sources in the vicinity, such as parking aid systems in
other vehicles),
4. Immediate surroundings
+ Fluorescent tubes.
+ Induction loops at traffic ights and car park barriers.
+ Ramps/Driveways.
Vehicle
5. Check installation of the license plate and carrier regarding the following points:
+ Protruding plate carrer.
+ If possible, do not use any advertising carriers.
+ The size of the license plate must be identical to that of the base carrier.
+ License plate and number plate carrier must lie flat.

+ Ensure that the number plate and carrier are secured correctly at the side edges (edges bent upwards).
6. Add-on parts/modifications/retrofits which are not Audi Genuine Accessories could lead to an erroneous warning being issued.
+ Trailer hitch.
+ Lowered ride height.
+ Spoilers.
+ Bumpers.
+ Sound generators.
+ Anti-rodent devices.
7. _ Previous damage where a new coat of paint has been applied (refer to repair history).
Checks without removal work / without diagnostic tester
1. External check of parking aid sensors for:
+ Dirt, ice, foreign objects, stuck-on foilfilm. ZEN
+ Damage on the bumper, air intake grile and
underbody which may have been caused by
parking accidents.
+ Mechanical damage (stone chipping, scratches).
+ Assessed as not OK: Clean/replace sensor = =
Stone chipping and scratches are not faults which ;
are covered under warranty. Dirty sensors must be
cleaned. N
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Figure 3. Stone chips causing sensor failure.
2. Check that parking aid senders are seated securely eT
and engaged correctly by applying pressure. pao
Assessed as not OK: Repair in accordance with
Workshop Manual (Removing and installing
parking aid sender)
Figure 4. A pressure check on a parking aid sensor.
3. Check that decoupling ring is seated correctly.
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Figure 5. A correctly seated decoupling ring. Figure 6. An incorrectly seated decoupling ring Figure 7. An incorrectly seated decoupling ring
(bulging). (folded).
Assessed as not OK: Repair in accordance with Workshop Manual (Removing and installing parking aid sender)
4. Check that parking aid sender is seated centrally.

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Figure 8. A correctly centered parking aid sensor. Figure 9. An off-center parking aid sensor.
Assessed as not OK: Repair in accordance with Workshop Manual (Removing and installing parking aid sender)
5. Check whether the decoupling ring encloses the sensor evenly.
Assessed as not OK: Repair in accordance with Workshop Manual (Removing and installing parking aid sender)
6. Check that sensor is fitted so that itis flush with bumper.
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Figure 10. A correctly installed parking aid sensor. Figure 11. An incorrectly installed parking aid sensor.
Assessed as not OK: Repair in accordance with Workshop Manual (Removing and installing parking aid sender)
Checks without removal work / with diagnostic tester
1. Check the vehicle fault memory and proceed according to GFF.
Assessment: If a DTC is stored for one or more parking aid senders, the affected parking aid sender must be swapped for another one. If the event memory
entry is no longer logged, it is not necessary to replace the sender.
2. Ifthe customer complains that a warning is issued although there is no obstacle:

+ Observe oscillation time in measured value blocks (target: 0.8-1.5 milliseconds); decoupling by covering sensor with a foam element which absorbs the ultrasound.

+ Observe distance evaluation in measured value blocks (which sensor possibly issues a warning for no good reason; check/confirm the distance shown).

+ Procedure to be followed if discrepancies are detected: Decouple parking aid sender by covering it with a foam element which absorbs the ultrasound.
Assessment: If decoupling the sensor results in the obstacle warning no longer being issued, please check the surrounding area for reflective objects and
remove these. Replacement is not necessary at this point.

If an obstacle warming is still issued although the parking aid sender is covered with a foam element and no damage or dirt is visible, this parking aid sender
must be replaced.

3. Check coding in parking aid control unit as specified in Workshop Manual (e.g. if a towing bracket has been retrofitted).
4, Check part number read out with tester according to parts catalogue.
Checks with removal work / with diagnostic tester
1. Check connections at sensors, at coupling point on bumper, at parking aid control unit and at parking aid sound generator with regard to the following points:
+ Corrosion.
+ Water entering/traces of water.
+ Bent pins.
+ Pushed-back pins.
+ Connector seal must be seated correctly.
+ Seal for pins must be seated correctly.

Assessed as not OK: Repair in accordance with Workshop Manual
2. Check wires in bumper harness for:
+ Damage/crushing.
+ Sufficient length.
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Figure 12. A correctly installed cable with sufficient length. = = =
Figure 13. A sensor cable with insufficient length.
Assessed as not OK: Optimize routing by moving clips so that wires are no longer under tension.
3. Check connectors at parking aid sender and at coupling point.
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Figure 14. A correctly installed parking aid sensor connector. eee pas eat ie SS eae
Figure 15. A parking aid sensor connector that is not seated correct
4. Check bracket for sensor in bumper for:
+ Damage/deformation.
. Secure attachment.
+ Correct alignment.
. Dirt.
5. Check sensors for:
+ Damage/deformation.
. Secure attachment.
+ Correct alignment.
. Dirt.
+ Correct part number according to parts catalogue.
Painting the parking aid sensors
When painting the replacement sensors, it is essential to observe the special painting instructions for parking aid senders in the Paintwork manual.
To do so, go to ElsaPRO >> Repair manual >> Body >> General Information — Paint >> 00 General, Technical Data >> General Information >> Parking Aid Sensor Paint
The painting area ranges from a minimum of 2-3mm to a maximum of 8mm from the outside surface to the rear. The housing itself must not be painted.
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Figure 16. Paint ok. Figure 17. Paint not ok.

Please provide a brief, informative account of the result of the analysis (cause of complaint) in the warranty notes.

Further information about the customer complaint “Parking aid issues warning although there is no obstacle” can be found in two videos on the Audi Knowledge Tank (AKT):

+ Parking aid incorrect warnings - causes on the vehicle (SoST_0012).

+ Parking aid incorrect warnings - external influences (SoST_0016).
Warranty
Claim Type: + For warranty claims, please claim repair under applicable Service number/damage code.

+ Ifthe vehicle is outside of any warranty, this Technical Service Bulletin is informational only.

Damage Code: 0040 0040 0040
Additional Information
All part and service references provided in this TSB (2024323) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest,
information and parts bulletins. Please check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
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