The main issue reported by owners is intermittent rough shifting, hesitation, or a shudder from the Passport’s 9-speed automatic transmission. Honda has issued service bulletins and software updates to address these symptoms, and there has not been a widespread model-wide recall specifically for transmission failures on the 2021 Passport as of 2024.
Beyond this concise summary, the question deserves context. The 2021 Passport shares its drivetrain with other Honda SUVs that use the same 9-speed automatic, and while overall reliability is strong, a subset of owners has described shifting irregularities that can affect daily driving. Regulators, consumer forums, and the manufacturer’s own service notices provide the basis for what is known as of mid-2024. This article synthesizes those sources to outline common symptoms, official responses, and practical steps for owners concerned about transmission behavior.
What owners are noticing
Before listing the symptoms, here is an overview of what people are reporting through regulator databases, owner forums, and service communications:
- Occasional harsh or abrupt shifts between gears, especially from low gears to higher gears.
- Delays or hesitations during acceleration as the transmission chooses a gear.
- A noticeable shudder or bucking feeling during a shift, often described as a brief jerk.
- Unexpected downshifts or upshifts when driving at steady speeds, along with brief loss of power.
- A few reports of transmission noise or surging behavior under certain temperatures or driving conditions.
These symptoms are generally more noticeable at low speeds, during city driving, or after a cold start. While they can be disconcerting, outright transmission failure remains relatively uncommon in the reported cases.
What Honda has done and what to expect from repairs
Honda has responded to these reports with service bulletins and diagnostic guidance aimed at smoothing shifts and correcting sensor or calibration-related glitches. The actions commonly described in these notices include the following:
Common fixes described in service bulletins
- Transmission control module software updates to recalibrate shift points and torque converter behavior.
- Valve-body inspection or replacement for certain driving conditions or fault codes.
- Torque converter checks and, if needed, replacement to address shudder or slipping.
- Transmission fluid inspection or replacement with the specified Honda fluid and capacity guidelines.
- ECU/TCM recalibration after other repairs to ensure proper adaptation to driving conditions.
Not every Passport will require all of these steps; diagnostics determine the appropriate remedy, and many repairs are covered under warranty or specific Technical Service Bulletins (TSBs) depending on the vehicle’s age and mileage. Owners should request the latest TSBs for their VIN from the dealership and verify any updates in the vehicle’s service history.
Potential causes and what to watch for
Experts and service notes point to a few recurring themes that can drive the observed behavior in the 9-speed automatic:
Likely causes cited by Honda and regulators
- Calibration issues in the transmission control module that affect shift timing and torque converter lock-up.
- Valve-body wear or contamination that interferes with hydraulic pressure and gear engagement.
- Torque converter problems causing shudder, slipping, or engagement delays.
- Fluid conditions (age, quality, or incorrect specification) impacting hydraulic performance.
- Electrical or sensor glitches (related to speed sensors or transmission position sensors) triggering fault codes.
Regular maintenance, using the recommended transmission fluid, and timely software updates can mitigate many of these issues. However, persistent symptoms typically require dealer diagnostics and potentially component-level repairs under warranty.
What to do if you own a 2021 Passport
If your Passport is exhibiting transmission problems, follow these practical steps to diagnose and seek repair:
- Document symptoms with dates, mileage, and driving conditions. Take note of whether issues occur at cold start, during acceleration, or at steady speeds.
- Check for open recalls or TSBs for your VIN via NHTSA’s SaferCar.gov or Honda’s official service portals, and have your VIN ready when you visit the dealer.
- Schedule a diagnostic appointment with a Honda dealer and request a transmission-related diagnostic, including any available software updates.
- Ask the technician to review related TSBs and to perform the recommended fixes (software updates, valve-body checks, torque-converter inspection, etc.) as indicated by the diagnostic results.
- Confirm warranty coverage or eligibility for extended coverage before approving repairs, and keep all service records and part numbers for future reference or resale.
- If you’re not satisfied with the dealer’s assessment or resolution, contact Honda Customer Service and, if needed, escalate the matter to consumer protection avenues or regulatory agencies.
Thorough documentation and prompt dealer engagement improve the chances of effective resolution and can help with warranty or goodwill accommodations.
Summary
The 2021 Honda Passport’s transmission issues center on intermittent shifting irregularities within the 9-speed automatic. While owner reports exist and some regulatory complaints have been filed, Honda’s response has focused on software updates and targeted repairs rather than a full model-wide recall for transmission failure as of mid-2024. If you experience symptoms, timely dealer diagnostics, adherence to TSB guidance, and proper maintenance are the best paths to a resolution. Always verify current recalls and TSBs for your VIN and keep detailed service records.