Quick answer
The current Toyota collection focuses on selected auto start-stop and setting-memory applications, not every Toyota model or every factory system. Listings include different A-OFF switch harnesses and plug-and-play products for Highlander, RAV4, Tundra, GR Corolla iMT, Tacoma and 4Runner. Confirm the exact year, trim, switch/interface and product notes before ordering.
Toyota vehicles vary by model, generation, trim and powertrain. A memory harness for one A-OFF switch is not automatically suitable for another Toyota simply because both vehicles have an auto stop/start feature. The product's connection point, switch design and supported year range determine whether it applies.
Identify which factory feature you are addressing
For auto start-stop, separate a preference-memory goal from a system fault. A memory product may retain a selected setting on a supported interface; it does not repair a weak battery, charging issue or a system warning. If the feature became unavailable after service, check the exact owner's manual and battery/service requirements first.
For TPMS, measure tire pressure and inspect the tires before investigating sensors or electronic devices. A start-stop product cannot resolve a TPMS warning, and an emulator does not measure the actual pressure in a tire. Keep product selection tied to the function that is actually fitted and the problem that is actually present.
Examples from the current Toyota catalog
The Toyota catalog focuses on selected start-stop applications. The table below shows examples of listed products, not a claim that every year or trim within a model is supported.
| Current listing example | Interface described in listing | Fitment check |
|---|---|---|
| Highlander 2020–2025 | Console memory harness | Confirm console/switch configuration and exact year. |
| RAV4 2020–2025 | A-OFF memory harness, 6-inch harness description | Match the actual switch and connection location. |
| Tundra 2022–2025 | Dash-switch memory harness | Verify the switch interface and listing notes. |
| Tundra 2022–2026 | Separate plug-and-play listing | Do not assume the two Tundra products are interchangeable; compare the exact application. |
| GR Corolla iMT 2023–2025 | Auto-on memory module | Confirm the iMT-specific application; do not extend to other Corolla variants. |
| Tacoma 2024–2026 | Plug-and-play start-stop eliminator | Match the exact generation and product notes. |
| 4Runner 2025–2026 | Auto start-stop eliminator | Do not infer coverage for earlier 4Runner generations. |
Why switch and model-year details matter
Some products are described as console or dash-switch harnesses; others are plug-and-play. Those are different connection designs. A product that connects behind a specific switch cannot be assumed to fit a nearby switch or a different dashboard layout. Similarly, two Tundra listings with different product descriptions should not be merged into one broad year range without checking the actual interface.
Model-year changes can introduce a new generation, switch design or factory control architecture while the model name stays the same. Use the individual product page to confirm the supported years and any factory-equipment exclusions. If the switch photo, connector or instructions do not match the vehicle, stop and request confirmation rather than forcing a connector or guessing at pinout.
A Toyota fitment check before checkout
- Record the build: year, model, trim and powertrain where relevant.
- Confirm the feature: verify the vehicle has the factory start-stop function the product is designed to address.
- Read the exact listing: check model-year range, switch/harness description, connection point and exclusions.
- Compare the actual interface: use the product images and instructions for that exact listing.
- Resolve any mismatch: if the model year or connector is not explicitly covered, treat fitment as unverified until confirmed.
Toyota's owner resources and manuals help establish factory features and messages. The individual product listing remains the source for aftermarket fitment. Do not use a broad brand page as a substitute for the exact product instructions.
The interface is the deciding detail on many Toyota products
The current catalog contains more than one product style. Highlander is listed with a console memory harness; RAV4 has an A-OFF memory harness described with a six-inch harness; Tundra has a dash-switch harness and a separate plug-and-play listing; GR Corolla iMT has an auto-on memory module. These descriptions point to different interfaces or behaviors. They should not be treated as interchangeable just because the product names include “start-stop.”
When a listing names a console switch, dash switch, A-OFF button or a specific transmission variant, verify that the vehicle has that exact configuration. If the product image shows a different switch or connector, do not infer that the wiring is compatible. Use the instructions for the exact product and request confirmation when the actual vehicle does not match.
Model-year boundaries are meaningful
The catalog lists Highlander and RAV4 products for 2020–2025, Tundra applications from 2022, a Tacoma product for 2024–2026 and a 4Runner product for 2025–2026. These ranges align with specific product records; they are not a guarantee that adjacent model years use the same interface. In particular, do not extend the 2025–2026 4Runner listing to earlier generations without explicit fitment support.
The GR Corolla iMT listing is another example of why the exact vehicle variant matters. A product described for an iMT application should not be generalized to every Corolla or every transmission. Verify the model variant, factory behavior and the exact product notes.
What to have ready before ordering
Record the year, model, trim and relevant powertrain. Identify the factory feature and switch/interface. Then read the product's detailed application notes, not just the title. If the listing is for a specific console or dash-switch harness, compare the actual vehicle and the installation reference. If the product uses a different interface, stop and ask rather than adapting the harness.
If start-stop is unavailable with a warning, or the behavior changed after battery service, diagnose that issue separately. A memory module is not a repair for a weak battery or charging-system fault. If the concern is TPMS, check tire pressure and the sensor/relearn path; the start-stop product collection is unrelated.
The Toyota collection is intentionally a list of selected applications. A missing model/year is not proof that no solution exists, but it is not a reason to assume a product fits. Request confirmation and treat the application as unverified until the evidence is clear.
A precise Toyota fitment question
When requesting help, identify the model and the exact interface named in the product listing: Highlander console harness, RAV4 A-OFF harness, Tundra dash-switch harness or plug-and-play product, GR Corolla iMT auto-on module, Tacoma or 4Runner application. If the interface name does not match the vehicle, include the model year and a description of the actual switch rather than assuming the product is close enough.
The same principle applies to model-year boundaries. A listing for the 2024–2026 Tacoma or 2025–2026 4Runner should not be extended to an earlier generation without explicit fitment evidence. If a year is not shown, ask the supplier to confirm it and keep the application unverified until the response is clear.
Variant-specific products are not broad model-family products
The GR Corolla iMT listing is described as an auto-on memory module, while other Toyota listings focus on A-OFF switch memory or plug-and-play start-stop behavior. Those descriptions signal different use cases. Do not assume a product for a manual-transmission iMT variant applies to every Corolla, or that a console harness and dash-switch harness use the same connection. Confirm the actual feature and interface before selecting a product.
For an unlisted model year, request explicit confirmation. A nearby year or a visually similar switch is not enough to establish that the connector, control logic and product behavior match.
Before checkout, compare the vehicle manual's description of the factory function with the product's stated behavior. If the product is described as retaining a setting, do not assume it changes the underlying start-stop logic in every condition. That distinction helps set the right expectation and avoids treating normal factory operation as a product fault.
Confirm what the product is expected to remember
A memory product can retain a setting or restore a selected state according to its documented design. That does not necessarily mean the vehicle's factory system will stop or restart under every condition, and it does not repair a battery or system warning. Read the product description for the exact expected behavior and compare it with the vehicle's owner's manual.
If the goal is a setting that resets each ignition cycle, check whether the product is explicitly designed for that interface. If the vehicle is showing a fault or the feature became unavailable after service, investigate the cause first. A correctly fitted memory harness and a repaired factory-system fault are different outcomes.
Frequently asked questions
Will a start-stop module fit every Toyota with an A-OFF button?
No. The button alone does not establish the connector, control interface or supported years. Match the exact product listing.
Does the Toyota collection cover every model?
No. It currently contains selected applications. If the exact model/year is not listed, request confirmation rather than assuming coverage.
Why are there two Tundra products with overlapping years?
The listings describe different product interfaces. Compare the product details and installation references instead of treating the year ranges as interchangeable.
What if the factory feature is unclear?
Use the owner's manual and reliable build information. If the feature or interface cannot be confirmed, resolve that before ordering.