Rolls-Royce bulletin RR65522171
What it saysCheck Control message (ID 166): Top up coolant The Check control message (ID166) appears despite correct coolant level. NHTSA’s full summary ↓
Rolls-Royce filed this with NHTSA as a service bulletin dated Apr 1, 2021, received May 24, 2021, about the engine — 2 documents under this number. It names 15 model years (2016–2021). 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 communicationCheck Control message (ID 166): Top up coolant The Check control message (ID166) appears despite correct coolant level. Coolant is visible in the expansion tank. The complaint occurs sporadically. The problem described here only concerns the High Temperature coolant circuit
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| RR65522171 | Service bulletin | Apr 1, 2021 | 10195179 | not found |
| RR65522171 | Service bulletin | Apr 1, 2021 | 10194324 | 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 group9 other manufacturer communications filed against these Rolls-Royce models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Rolls-Royce list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B066-25 | Other | Nov 20, 2025 | Expansion Tank Return |
| RRA12202207 | Service bulletin | Dec 21, 2022 | A Rolls-Royce Phantom (RR11/12), Ghost (RR21/22) and Cullinan (RR31) vehicles have been identified as having a potential issue concerning th… |
| RRA09202202 | Service bulletin | Sep 7, 2022 | Rolls-Royce Motor Cars NA is releasing this bulletin to advise that all vehicles added to this technical campaign must have the outer door h… |
| RRA09202201 | Service bulletin | Sep 7, 2022 | Rolls-Royce Motor Cars NA is releasing this bulletin to provide information regarding the reactivation/repair for the Comfort Entry Access s… |
| RR65562989 | Service bulletin | Sep 1, 2021 | Complaints of deposits, crystalisation or emulsification in the coolant expansion tanks. |
| RR64605110 | Service bulletin | Sep 1, 2021 | SoE - Diagnosis guides and quality reporting: The vehicle has been brought to the workshop with a complaint relating to the SoE function. |
| RR65547515 | Service bulletin | Jul 1, 2021 | Engine MIL light is illuminated and fault 12BF08 Lambda probe, from meager to fat slow reaction. |
| RR65391325 | Service bulletin | Mar 1, 2021 | Rolls-Royce Motor Cars have recently seen a few cases of defective sealing rings on injectors |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Rolls-Royce, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Rolls-Royce RR65522171 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 RR65522171 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. Every BMW warranty extension on file lists the ones BMW has filed.
Which vehicles does RR65522171 cover?
The manufacturer filed it against 15 model years: 2021 Rolls-Royce Cullinan, 2020 Rolls-Royce Cullinan, 2021 Rolls-Royce Ghost, 2020 Rolls-Royce Ghost, 2018 Rolls-Royce Ghost, 2017 Rolls-Royce Ghost and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.