Acura bulletin B26-002
What it saysUnder certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. NHTSA’s full summary ↓
Acura filed this with NHTSA as a service bulletin dated Sep 25, 2026, received Aug 27, 2026, about the engine — 2 documents under this number. It names 4 model years (2023–2026). 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 communicationService Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored (DTCs are not required for repair).
Trouble codes it names: P0300 P0304
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B26-002 | Service bulletin | Sep 25, 2026 | 11037717 | PDF, 4,835 KB |
| B26-002 | Service bulletin | Aug 26, 2026 | 11036422 | PDF, 5,059 KB |
What the document itself lists
The manufacturer titles it “Warranty Extension: 2023–26 Integra (CVT) Cylinder Head Gasket”.
Parts the bulletin names — the first 40 it lists
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 12251-6A0-A11 | GASKET, CYLINDER HEAD | 1 | eBay Motors → |
| 12341-59B-013 | GASKET, HEAD COVER-2023-2025 only | 1 | eBay Motors → |
| 12341-6VJ-A01 | GASKET, HEAD COVER 2026 only | 1 | eBay Motors → |
| 15400-RTA-003 | FILTER, OIL | 1 | eBay Motors → |
| 15533-59B-003 | FILTER ASSY., TURBOCHARGER OILFEED | 1 | eBay Motors → |
| 15535-6A0-A00 | WASHER, SEALING (TURBO FEED LINE) | 1 | |
| 15832-RAA-A01 | OIL SEAL, CONTROL VALVE | 1 | eBay Motors → |
| 16012-5PA-315 | PIPE SET, FUEL JOINT-2023-2025 only | 1 | eBay Motors → |
| 16012-6NA-305 | PIPE SET, FUEL JOINT 2026 only | 1 | eBay Motors → |
| 17105-5AA-004 | GASKET, IN. MANIFOLD | 4 | eBay Motors → |
| 17152-64A-A00 | TUBE SET, BREATHER | 1 | eBay Motors → |
| 17275-6A0-A01 | GASKET, TURBOCHARGER IN. JOINTPIPE | 1 | eBay Motors → |
| 18233-6A0-004 | GASKET A, TURBOCHARGER | 1 | eBay Motors → |
| 18234-59B-004 | GASKET B, TURBOCHARGER | 1 | eBay Motors → |
| 18302-SP0-003 | GASKET, EX. PIPE | 1 | eBay Motors → |
| 19012-PD2-004 | O-RING, DRAIN (TOYO) | 1 | eBay Motors → |
| 19321-59B-004 | GASKET, THERMOSTAT CASE | 1 | eBay Motors → |
| 90012-59B-004 | NUT, SELF-LOCK (10MM) (CATALYST) | 4 | eBay Motors → |
| 90160-TZA-000 | BOLT, FLANGE (12X45) (SIDE MOUNT) | 2 | eBay Motors → |
| 90166-TBA-A00 | BOLT, FLANGE (14X64) (SIDE MOUNT) | 2 | eBay Motors → |
| 90171-TBA-A00 | BOLT, FLANGE (10X30) (SIDE MOUNT) | 3 | eBay Motors → |
| 90212-SA5-003 | NUT, SELF-LOCK (10MM) (EXHAUST) | 3 | eBay Motors → |
| 90371-SJD-003 | NUT, FLANGE (14MM) (SIDE MOUNT) | 1 | eBay Motors → |
| 91212-59B-003 | OIL SEAL (43X58X7) (CRANK SEAL) | 1 | eBay Motors → |
| 91311-5A2-A01 | HPFP O-RING-2023-2025 only | 1 | eBay Motors → |
| 91311-5R1-J01 | HPFP O-RING-2026 only | 1 | eBay Motors → |
| 91314-PH7-003 | O-RING | 2 | eBay Motors → |
| 10003-64B-A00 | GENERAL ASSY., CYLINDER HEAD – 2023-2025 only | 1 | eBay Motors → |
| 10003-6NA-A00 | GENERAL ASSY., CYLINDER HEAD – 2026 only | 1 | eBay Motors → |
| 15815-6A0-A01 | FILTER ASSY., SPOOL VALVE | 1 | eBay Motors → |
| 16451-5R1-J01 | CLIP, INJECTOR – 2023-2025 only | 1 | eBay Motors → |
| 16451-6MA-J01 | CLIP, INJECTOR – 2026 only | 4 | eBay Motors → |
| 16453-5R1-J00 | SEAL SET, INJECTOR-2023-2025 only | 1 | eBay Motors → |
| 16453-6MA-J00 | SEAL SET, INJECTOR – 2026 only | 1 | eBay Motors → |
| 19310-6A0-A01 | COVER ASSY., THERMOSTAT | 1 | eBay Motors → |
| 10002-64B-A00 | GENERAL ASSY., CYLINDER BLOCK – 2023-2025 only | 1 | eBay Motors → |
| 10002-6Z7-A00 | GENERAL ASSY., CYLINDER BLOCK – 2026 only | 1 | eBay Motors → |
| 18303-T2B-A01 | GASKET, EX. PIPE | 1 | eBay Motors → |
| 19411-5AA-A01 | O-RING, WATER PASSAGE (OIL) | 1 | eBay Motors → |
| 90002-S10-000 | NUT, FLANGE (10MM) (SWAY BAR LINK) | 1 | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 1105E2 | Inspect for coolant leaks. Remove cylinder head and check head and engine block for… | 11.3 hrs |
Read by machine from the document NHTSA serves (22 pages), read Oct 4, 2026. A part number is shown only where it matches Acura’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 4 model years this bulletin names have filed 286 complaints with NHTSA since 2015. 7 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.
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 group6 other manufacturer communications filed against the Acura Integra under the same component group (engine), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B26-003 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| BBJA31120 | Service bulletin | Sep 14, 2026 | Job Aid - This job aid only applies to vehicles involved in the cylinder head gasket warranty extension. While replacing the cylinder head g… |
| BEBM08262026901 | Other | Aug 26, 2026 | Dealer Message - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience over… |
| B25-051 | Service bulletin | Sep 17, 2025 | Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover. |
| B25-050 | Service bulletin | Sep 17, 2025 | Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover. |
| B24-026 | Service bulletin | Apr 16, 2024 | Service Bulletin - MIL comes on and sets DTC P0011 (Variable Valve Timing Control (VTC) A System Malfunction) due to a lack of oil control b… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Acura, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Acura B26-002 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 B26-002 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 Honda warranty extension on file lists the ones Honda has filed.
Which vehicles does B26-002 cover?
The manufacturer filed it against 4 model years: 2026 Acura Integra, 2025 Acura Integra, 2024 Acura Integra, 2023 Acura Integra. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.