Audi bulletin TSB-2074475_3
What it saysThis bulletin provides information when DTC U010100 , Lost Communication with TCM in diagnostic address 23 occurs. NHTSA’s full summary ↓
Audi filed this with NHTSA as a service bulletin dated Feb 24, 2025, received Mar 19, 2025, about the power train. It names 18 model years (2020–2025). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis bulletin provides information when DTC U010100 , Lost Communication with TCM in diagnostic address 23 occurs.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TSB-2074475_3 | Service bulletin | Feb 24, 2025 | 11015767 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 18 model years this bulletin names have filed 171 complaints with NHTSA since 2015. 7 of them name Power Train — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On March 22, 2026, my Check Engine light came on while driving my 2022 Audi A3. Prior to this, I had been noticing a slight jerk when accelerating from a stop. Because Audi dealerships charge approximately $250 just to read diagnostic codes, I went to Discount Auto Parts, where they retrieved code P27F500 — indicating the gear shift lock…
2022 Audi A3 · Power Train · filed with NHTSA Mar 23, 2026 · ODI 11726245
Lease Begin Date: May 1, 2024 Mileage at time of first incident: 16800 Current Mileage: 17,500 Incident Description: This vehicle has exhibited unintended rearward movement on two separate occasions following a "Drive System Malfunction" warning, each occurring immediately after shifting into Drive on an incline.
2024 Audi Q3 · Power Train · filed with NHTSA Apr 1, 2026 · ODI 11728450
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the power train
Source: same model, same component group65 other manufacturer communications filed against these Audi models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Audi list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB_2059057_15 | Service bulletin | Aug 4, 2026 | This bulletin provides informatin when there is binding or vibrations in tight turns with quattro Ultra. |
| TSB_2073060_5 | Service bulletin | Jul 21, 2026 | This bulletin provides information when there is a loss of coolant from the coolant pump. |
| TSB_2080373_2 | Service bulletin | Jun 25, 2026 | This bulletin provides information when there are uncomfortable gear shifts when shifting in higher gears. |
| TSB_2059057_14 | Service bulletin | May 27, 2026 | This bulletin provides informatin when there is binding or vibrations in tight turns with quattro Ultra. |
| TSB_2077475_2 | Service bulletin | May 8, 2026 | This TSB provides information when the gearbox warning light is on; event memory entry P0174A00/P174E00. |
| TSB_2074808_4 | Service bulletin | May 6, 2026 | The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content… |
| TSB_2070349_6 | Service bulletin | Mar 24, 2026 | This bulleitn provides informiaotn when there is a loss of coolant; mechanical coolant pump 2.9L, 3.0L V6 TFSI. |
| TSB_2080074_2 | Service bulletin | Mar 20, 2026 | This bulletin provides information when there are noises/vibrations from the dash panel/window shield. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Audi, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Audi TSB-2074475_3 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the TSB-2074475_3 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does TSB-2074475_3 cover?
The manufacturer filed it against 18 model years: 2025 Audi A3, 2024 Audi A3, 2023 Audi A3, 2022 Audi A3, 2025 Audi Q3, 2024 Audi Q3 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.