Volvo bulletin 35526.1.8
What it saysThis is a Technical Journal: Text plus 2 PDFs and 1 .PNG Oil Consumption test. NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service bulletin dated Apr 23, 2026, received May 14, 2026, about the engine. It names 76 model years (2016–2026). 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 is a Technical Journal: Text plus 2 PDFs and 1 .PNG Oil Consumption test. Perform the test. Follow service procedure Description and Service sections updated to clarify that vehicle reports are not required.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 35526.1.8 | Service bulletin | Apr 23, 2026 | 11032678 | 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 themand 36 more on this site: 2021 Volvo V90, 2020 Volvo V90, 2019 Volvo V90, 2018 Volvo V90, 2017 Volvo V90, 2026 Volvo XC40, 2025 Volvo XC40, 2024 Volvo XC40, 2023 Volvo XC40, 2022 Volvo XC40, 2021 Volvo XC40, 2020 Volvo XC40, 2019 Volvo XC40, 2026 Volvo XC60, 2025 Volvo XC60, 2024 Volvo XC60, 2023 Volvo XC60, 2022 Volvo XC60, 2021 Volvo XC60, 2020 Volvo XC60, 2019 Volvo XC60, 2018 Volvo XC60, 2017 Volvo XC60, 2016 Volvo XC60, 2016 Volvo XC70, 2026 Volvo XC90, 2025 Volvo XC90, 2024 Volvo XC90, 2023 Volvo XC90, 2022 Volvo XC90, 2021 Volvo XC90, 2020 Volvo XC90, 2019 Volvo XC90, 2018 Volvo XC90, 2017 Volvo XC90, 2016 Volvo XC90.
A 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 76 model years this bulletin names have filed 1,592 complaints with NHTSA since 2015. 239 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.
On the 2016 Volvo XC90, the 34 owners who gave an odometer reading for Engine reported it at a median of 24,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Owned this new 2016 xc 90 t8 for about 30 days. Charged car overnight as usual. Drove it about 3 miles the next morning and suddenly car speed slowed dramatically to about 10 MPH and a "car will not restart, drive to nearest dealership" unfortunately, I was not in the position to do so, so I pulled into a strip mall to safely park the…
2016 Volvo XC90 · Engine · filed with NHTSA Oct 25, 2016 · ODI 10918891
The contact owns a 2026 Volvo XC90 PHEV. The contact stated that while driving at an undisclosed speed, there was an abnormal odor inside the vehicle. No warning lights were illuminated. The contact refused to drive the vehicle due to the abnormal odor. The vehicle was not diagnosed or repaired by an independent mechanic or dealer.
2026 Volvo XC90 · Engine · filed with NHTSA Aug 31, 2026 · ODI 11761067
What component or system failed or malfunctioned, and is it available for inspection upon request? The front warning collision comes on when a car is not even close. Engine, a part in the engine area has been replaced twice. Transmission, not shifting properly when 2/3. How was your safety or the safety of others put at risk?
2022 Volvo S60 · Engine · filed with NHTSA Mar 7, 2024 · ODI 11576108
In depth: 2016 Volvo XC90 engine problems →
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 group33 other manufacturer communications filed against these Volvo models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Volvo list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 37083.8.1 | Service bulletin | Sep 24, 2026 | This is a Technical Journal: Text plus 1 MP4 - Not possible to go to Drive mode after ERS start. Download software. Please follow the advice… |
| 37844.2.0 | Service bulletin | Sep 12, 2026 | This is a TJ - text, plus 1 attached PDF - and 2 .MOV files If a noise from the engine occurrs during idling, refer to the attached sound fi… |
| 37316.5.0 | Service bulletin | Sep 12, 2026 | This is a Technical Journal: DTC ECM-P06DE00 set, no symptoms. Do not replace any parts or perform additional fault tracing. This is a misde… |
| 37844.1.0 | Service bulletin | Jun 26, 2026 | This is a TJ - text, plus 1 attached PDF - and 2 .MOV files If a noise from the engine occurrs during idling, refer to the attached sound fi… |
| 36923.9.1 | Service bulletin | Apr 22, 2026 | This is a Technical Journal: Text document plus 1 PDF attachment Coolant Pump Dry Coolant Mix Residue. If the coolant pump has an active lea… |
| 37083.7.0 | Service bulletin | Apr 18, 2026 | This is a Technical Journal: Text plus 1 MP4 - Not possible to go to Drive mode after ERS start. Download software. Please follow the advice… |
| 37288.4.0 | Service bulletin | Feb 21, 2026 | This is a Technical Journal: MIL and DTCs ECM P012807/P01287A. In case of MIL and DTCs P012807 and P01287A set together, follow advice under… |
| 36923 | Service bulletin | Feb 17, 2026 | This is a Technical Journal: Text document plus 1 PDF attachment Coolant Pump Dry Coolant Mix Residue. If the coolant pump has an active lea… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Volvo, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Volvo 35526.1.8 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 35526.1.8 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 35526.1.8 cover?
The manufacturer filed it against 76 model years: 2025 Volvo EX40, 2026 Volvo EX90, 2025 Volvo EX90, 2025 Volvo S60, 2024 Volvo S60, 2023 Volvo S60 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.