Hyundai bulletin 26-FL-001H
What it saysSome vehicles equipped with a 2.5L GDI Theta III engine (non-Turbo) may exhibit one or more misfire DTCs due to the GDI fuel injectors leaking internally. NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a service bulletin dated Jan 7, 2026, received Jan 13, 2026, about the fuel/propulsion system — 1 document under this number: 26-FL-001H TSB. It names 8 model years (2021–2023). 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 communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
Some vehicles equipped with a 2.5L GDI Theta III engine (non-Turbo) may exhibit one or more misfire DTCs due to the GDI fuel injectors leaking internally. This may be caused by internal filter breakage in the injector. Follow the procedure in this TSB to replace all 4 injectors on affected vehicles, using the kit in the Parts Information section.
Trouble codes it names: P0300 P0301 P0302 P0303 P0304 all 5 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 26-FL-001H TSB | Service bulletin | Jan 7, 2026 | 11027589 | PDF, 619 KB |
What the document itself lists
The manufacturer titles it “GDI FUEL INJECTOR REPLACEMENT - MISFIRE DTC(S)”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 35399-2S133QQH | Use 1 Kit | — | eBay Motors → |
| 35310-2S000 | Fuel Injector – GDI | 4 | eBay Motors → |
| 35309-04AA0 | Clip – Fuel Injector | 4 | eBay Motors → |
| 35305-2S000 | Pipe – High Pressure | 1 | eBay Motors → |
| 28411-2S010 | Gasket-Port | 3 | eBay Motors → |
| 28411-2S020 | Gasket – Port FKM | 1 | eBay Motors → |
| 28411-2S000 | Gasket – Throttle Body | 1 | eBay Motors → |
| 28493-2S000 | Gasket – EGR Pipe | 1 | eBay Motors → |
| 26333-2S000 | Gasket – Oil Filter Housing | 2 | eBay Motors → |
| 09314-L1100 | Socket | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 20DA14R9 | GDI Fuel Injector Replacement (All 4 Injectors) | 1.4 hrs |
Read by machine from the document NHTSA serves (9 pages), read Sep 29, 2026. A part number is shown only where it matches Hyundai’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 8 model years this bulletin names have filed 1,741 complaints with NHTSA since 2015. 367 of them name Fuel/Propulsion System — 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.
I was idling for 15 minutes and then drove for 10 minutes at which time the Check Hybrid System Stop Safely alert showed on my dashboard with the red light. I was on a bridge and could not stop in the middle, this was very terrifying and dangerous as I was loosing acceleration and speed and it felt like the car was about to totally turn…
2022 Hyundai Santa Fe · Fuel/Propulsion System · filed with NHTSA Jun 22, 2023 · ODI 11528418
Fuel injector failed. The vehicle stall and accelerate poorly due to misfires. It is leaching gasoline into the oil which can result in total engine failure. Dealership verified the injector was bad. There was a warning light at one time after refueling, presumed it was my fuel cap, tightened it, and the light went away
2022 Hyundai Sonata · Fuel/Propulsion System · filed with NHTSA Sep 5, 2025 · ODI 11685272
Had been traveling for approximately 2.5 hours in a winter storm, pushed on brake to slow down and park and the car started to chug. Turned car off and then back on again. Car would not start and had to be towed to nearest Hyundai dealership. There were no warning signs at all, car just suddenly quit.
2023 Hyundai Sonata · Fuel/Propulsion System · filed with NHTSA Feb 13, 2024 · ODI 11571570
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 fuel/propulsion system
Source: same model, same component group7 other manufacturer communications filed against these Hyundai models under the same component group (fuel/propulsion system), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 26-FL-002H | Service bulletin | Jun 3, 2026 | Some Sonata Hybrid (DN8 HEV) vehicles may display a Check Engine light and store one or more of the DTCs listed below due to an abnormal air… |
| 25-FL-001H | Service bulletin | Jan 9, 2025 | Some vehicles equipped with a 2.5L GDI Theta III engine (non-Turbo) may exhibit one or more misfire DTCs due to the GDI injectors leaking in… |
| 25-01-001H | Service campaign | Jan 3, 2025 | Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have DTC P0451 stored in the ECU. Follow this bulletin to inspec… |
| 9B1 | Service campaign | Dec 10, 2024 | Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the Electroni… |
| SERVICE CAMPAIGN 9B0 | Service campaign | Jul 10, 2024 | Certain 2024MY Tucson Hybrid (NX4 HEV) vehicles may exhibit poor contact or wire breakage of the injector wiring harness. This affects a lim… |
| 24-DS-002H | Service bulletin | May 29, 2024 | Certain AWD 2024MY Santa Fe (MX5A) and Santa Fe Hybrid (MX5A HEV) vehicles may experience scraping, rubbing, and/or grinding noise coming fr… |
| 23-BD-015H | Service bulletin | Sep 25, 2023 | This bulletin provides instructions to inspect and replace the fuel filler door on 2023MY Santa Cruz (NXT) vehicles that exhibit paint imper… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Hyundai, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Hyundai 26-FL-001H 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 26-FL-001H 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 Hyundai warranty extension on file lists the ones Hyundai has filed.
Which vehicles does 26-FL-001H cover?
The manufacturer filed it against 8 model years: 2022 Hyundai Santa Cruz, 2022 Hyundai Santa Fe, 2021 Hyundai Santa Fe, 2023 Hyundai Sonata, 2022 Hyundai Sonata, 2021 Hyundai Sonata and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 26 May 2021 – 23 Jun 2022; 2021 - 2022 Santa Fe (TMA): built 1 Mar 2021 – 15 Jul 2022; 2021 - 2023 Sonata (DN8): built 8 Feb 2021 – 19 Jan 2023 — the build date is on the certification label in the driver’s door jamb.