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Technical Service Bulletin Transaction No.: 2073034/9

43 Air spring symbol lights up - DTC C118D01 Compressor for level control electrical

Release date: Dec 11, 2025
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Condition

Models) Year(s) VIN Range Vehicle Specific Equipment

A6 allroad, RS 6 Avant,
RS 7, A8, S8, Q7, SQ7, 2023 — 2026
Q8, SQ8, and RS Q8

A6, S6, A7, S7, Q5, Q5e
quattro, Q5 Sportback, 2023 — 2025
SQ5, and SQ5 Sportback

All Air Suspension
e-tron, and e-tron
Sportback 2024
Q8 e-tron, Q8 Sportback
e-tron, SQ8 e-tron, and 2025
$Q8 Sportback e-tron
REVISION HISTORY
Revision | Date Purpose
9 - Revised header (Updated models)

Revised Condition (Added model table)

Revised Parts and Tools (Updated information)

8 03/12/2025 | Revised Warranty (Modified Labor Operations)

7 02/21/2025 | Revised Warranty (Modified Labor Operations)
Revise Service (Added Note)

Customer states:

The message “Air suspension: system fault” is shown in the instrument cluster.

Workshop findings:

The following DTC is logged in the suspension control unit -J775- (diagnostic address 0074):

* ©118D01: Compressor for level control electrical error.

Technical Background
Not applicable.

Production Solution
Not applicable.

Service

If no irregularities are found when checking the wiring/contacts at the air compressor and compressor electronics -
J1135-, proceed as follows:

* Replace the control unit for compressor electronics J1135 (number 30 ), (not the air compressor).

Figure 1. Compressor electronics control unit J1135.

Note: Try to reproduce the customer complaint (based on the description/cause of the issue), so that it can
be clearly assigned to this TSB. The following repair must only be carried out if all the criteria (model/type,
chassis number, engine/motor and gearbox code, PR number(s), part number, software version, code etc.)
apply exactly. Otherwise, this solution will not eliminate the problem and repeat repairs may be necessary.
In such a case, we may reject the warranty claim and charge back the cost of the parts.

Warranty

Claim Type:

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

Service Number: 4316
Damage Code: 0039
Labor Operations: Remove and install control unit J1135 4316 19xx / 4316 | See SRT with
55xx associated operations
Check control unit (wires and connectors) 4316 0199 Please bill according
to the time required
GFF 0150 0060 Time stated on the
diagnostic protocol
Claim Comment: As per TSB 2073034/9

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures
Manual. Claims are subject to review or audit by Audi Warranty.

Required Parts and Tools

The part numbers mentioned in this TSB are different than the ones listed in ETKA. Only use parts listed in this
TSB, this includes superseding part numbers!

Part Number Part Description Quantity
See ETKA Fasteners, Bolts, Nuts, and Screws as needed per the Repair Manual See ETKA/ELSA
See ETKA Control unit for compressor electronics J1135 (if necessary) 01

Additional Information

All parts and service references provided in this TSB (2073034) are subject to change and/or removal.

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