Lamborghini bulletin L73X-A.07.18
What it saysAutomobili Lamborghini Spa has identified a problem in the idler roller. NHTSA’s full summary ↓
Lamborghini filed this with NHTSA as a service bulletin dated Dec 14, 2018, received Jul 15, 2019, about the engine. It names 1 model year (2016). 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 communicationAutomobili Lamborghini Spa has identified a problem in the idler roller.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| L73X-A.07.18 | Service bulletin | Dec 14, 2018 | 10162692 | not found |
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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More bulletins about the engine
Source: same model, same component group1 other manufacturer communication filed against the Lamborghini Aventador under the same component group (engine), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| BI.03.20 | Service bulletin | Mar 23, 2020 | Lamborghini informs that in case of replacement of the engine control unit or/and gearbox control unit, for correct configuration there is a… |

Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Lamborghini, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Lamborghini L73X-A.07.18 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 L73X-A.07.18 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 L73X-A.07.18 cover?
The manufacturer filed it against 1 model year: 2016 Lamborghini Aventador. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.