Nissan bulletin NTB20-077A
What it says9 speed a/t valve body (control valve TCM) replacement this bulletin is no longer active. NHTSA’s full summary ↓
Nissan filed this with NHTSA as a service bulletin dated Aug 7, 2024, received Aug 16, 2024, about the power train. It names 3 model years (2020–2021). 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summary of the manufacturer's communication9 SPEED A/T VALVE BODY (CONTROL VALVE TCM) REPLACEMENT This bulletin is no longer active. Please discard previous versions of NTB20-077.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NTB20-077A | Service bulletin | Aug 7, 2024 | 11006459 | PDF, 86 KB |
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 3 model years this bulletin names have filed 23 complaints with NHTSA since 2015. 12 of them name Power Train — 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.
The 9 speed automatic transmission suffered a catastrophic internal failure (codes PO893 and PO876), forcing the vehicle into limp mode. The vehicle loses propulsion unexpectedly in traffic, and the transmission risk complete mechanical lockup while driving.
2020 Nissan Frontier · Power Train · filed with NHTSA Jun 29, 2026 · ODI 11747306
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 power train
Source: same model, same component group5 other manufacturer communications filed against these Nissan models under the same component group (power train), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| NTB23-023B | Service bulletin | Feb 19, 2025 | FLUID LEAK FROM THE FRONT DIFFERENTIAL CASE ACTUATOR MOTOR PLASTIC THREADS SERVICE INFORMATION Figure 1 Figure 2 If the front differential h… |
| NTB24-007 | Service bulletin | Jan 22, 2024 | DIAGNOSING REAR FINAL DRIVE ASSEMBLY LEAKS SERVICE INFORMATION If a Rear Final Drive Assembly (rear solid axle) is found to be leaking f… |
| PC984 2023 Front | Service bulletin | Sep 15, 2023 | Transfer Case Range Sensor Voluntary Service Campaign *****Dealer Announcement***** Nissan is conducting a service campaign on certain… |
| NTB23-071 | Service bulletin | Sep 14, 2023 | VOLUNTARY SERVICE CAMPAIGN 2023 FRONTIER & 2023 TITAN/TITAN XD; TRANSFER CASE RANGE SENSOR INTRODUCTION Nissan is conducting this volu… |
| NTB23-056 | Service bulletin | Jun 21, 2023 | VOLUNTARY SERVICE CAMPAIGN 2022-2023 FRONTIER AND 2023 TITAN/TITAN XD; AUTOMATIC PARK FUNCTION INTRODUCTION Nissan is conducting this… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Nissan, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Nissan NTB20-077A 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 NTB20-077A 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 NTB20-077A cover?
The manufacturer filed it against 3 model years: 2020 Nissan Frontier, 2021 Nissan Titan XD, 2020 Nissan Titan XD. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.