Land Rover bulletin N766
What it saysOn certain vehicles, the cylinder block vacuum pipe blanking plug may become detached, resulting in an engine oil leak and stress on crank case breather system. NHTSA’s full summary ↓
Land Rover filed this with NHTSA as a manufacturer communication dated Jun 21, 2024, received Mar 8, 2023, about the engine — 3 documents under this number: N766 RANGE ROVER, N766-RANGE ROVER and 1 more. It names 1 model year (2021). A manufacturer communication 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 communicationOn certain vehicles, the cylinder block vacuum pipe blanking plug may become detached, resulting in an engine oil leak and stress on crank case breather system. A replacement of the blanking plug is required.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N766 RANGE ROVER | Other | Jun 21, 2024 | 11003799 | PDF, 202 KB |
| N766-RANGE ROVER | Other | May 17, 2024 | 11001271 | PDF, 172 KB |
| N766 | Service bulletin | Feb 22, 2023 | 10232693 | PDF, 190 KB |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| LR122305 | — | 5 hrs |
Read by machine from the document NHTSA serves (4 pages), read Sep 30, 2026. A part number is shown only where it matches Land Rover’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 1 model year this bulletin names have filed 44 complaints with NHTSA since 2015. 10 of them name Engine — 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.
RECALL REMEDY FAILURE-DEALER DENIED SAFETY REPAIR On 7/31 vehicle would shut off after cranking up. Eventually got a check engine light. I was out of town at the time and it was 630pm. I was able to take vehicle to a Advanced Auto so they could do a quick diagnostic check.
2021 Land Rover Range Rover · Engine · filed with NHTSA Aug 9, 2026 · ODI 11755757
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 engine
Source: same model, same component group70 other manufacturer communications filed against the Land Rover Range Rover under the same component group (engine), newest first. The eight newest are listed; the rest are on the Land Rover list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| D061 Range Rover 18SEP26 | Other | Sep 18, 2026 | Turbocharger Coolant Feed / Return Leak |
| D011 Range Rover 18SEP26 | Other | Sep 18, 2026 | Coolant Bypass Hose Leak |
| N861 Range Rover 21AUG26 | Other | Aug 21, 2026 | Mild Hybrid Electric Vehicle (MHEV) Battery Offline |
| D061 Range Rover 21AUG26 | Other | Aug 21, 2026 | Turbocharger Coolant Feed / Return Leak |
| D061 Range Rover 17JUL26 | Other | Jul 17, 2026 | Turbocharger Coolant Feed / Return Leak |
| D011 Range Rover 17JUL26 | Other | Jul 17, 2026 | Coolant Bypass Hose Leak |
| D067 Range Rover 16JUN26 | Other | Jun 16, 2026 | The Malfunction Indicator Lamp (MIL) is illuminated on the vehicles instrument panel cluster, due to a Transmission Control Module (TCM) net… |
| D061 Range Rover 16JUN26 | Other | Jun 16, 2026 | Turbocharger Coolant Feed / Return Leak |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Land Rover, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Land Rover N766 a recall?
No. A manufacturer communication 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 N766 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 N766 cover?
The manufacturer filed it against 1 model year: 2021 Land Rover Range Rover. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.