2023-2025 Toyota GR Corolla iMT Auto-On Memory Module | Plug & Play

If your Toyota GR Corolla turns Stop & Start back on every time you start it, this plug-and-play memory harness solves that one problem: it remembers the last setting and restores it at the next ignition cycle. Coverage is the 2023–2025 Toyota GR Corolla. It plugs in line with the factory connector named in the instructions, using factory-style plugs on both ends, so nothing is cut or spliced.

The factory button stays in place and still works. Press it and the module stores the new choice. Unplug the module and the vehicle goes back to stock behavior.

Covered model years

Listed applications (each row is a 100% fitment match for the factory connector this part uses):

• Toyota GR Corolla: 2023–2025

For reference, the Toyota GR Corolla in these years is a performance hatchback offered with the 1.6L turbocharged three-cylinder with a six-speed iMT manual transmission, most of the driving it sees is city commuting, parking-heavy errands and weekend driving. Trim is not listed separately. Any trim in these years with factory stop-start and the pictured connector is covered.

What the factory system does

On the Toyota GR Corolla, Stop & Start shuts the engine down at a stop and fires it back up as the brake is released. You can switch it off with the dash button, but the choice is not saved. The next ignition cycle brings the default back. The module keeps the choice you made instead.

Keep the battery healthy

The module draws its power from the vehicle and does not change charging behavior. If your Toyota GR Corolla sits for long periods, the same rules apply as without it: a maintainer helps, and a battery that tests weak should be replaced with the type specified for stop-start vehicles (usually AGM or EFB).

What to expect

• Keeps the original switch fully functional.
• No tune, no reflash, no change to horsepower or shift points.
• Fully reversible: unplug it and the vehicle returns to factory behavior.
• Stores the stop-start choice you made last and repeats it at the next start.

Typical reasons to keep it off

Drivers usually switch stop-start off for comfort or habit. A restart at every stop is noticeable in a performance hatchback, the climate system may run at reduced output while the engine is off, and quick moves into traffic feel slower when the engine has to fire first. If those are your reasons, you probably press the button on every drive now. With the module, you press it once.

Where it connects

It plugs in line with the factory connector named in the instructions, using factory-style plugs on both ends, so nothing is cut or spliced. The instructions show the connector for this application; compare it with the product photos before starting. Turn the vehicle off, make the connection, fix the module in place, and test with two or three key cycles.

Before blaming the module

If a "stop-start unavailable" or similar message appears, check the battery first. A battery that tests weak, a recent battery replacement that was not registered where the manufacturer requires it, or a fault in the battery current sensor can all disable the system. Clear up those issues before judging how the module works, because it cannot hold a setting the vehicle refuses to accept.

Things that already block an auto stop

A Toyota GR Corolla that rarely auto-stops is often telling you something about the battery. Stop-start vehicles usually run an AGM or EFB battery, and the system is one of the first features to drop out as that battery ages. Cabin temperature requests, engine temperature and brake pressure also factor in. None of these checks are altered by the module.

Quick fitment check

• Model year and model match a row in the table above (2023–2025 Toyota GR Corolla).
• Your Toyota GR Corolla has the factory stop-start button. Base trims or engines without stop-start have nothing for the module to remember.
• The battery and charging system test good and no warning lights are on.
• No aftermarket remote start, alarm or gateway bypass is wired into the same circuit. If one is, email support before ordering.
• The connector at your install point matches the one in the product photos.
• If you are unsure, send your VIN to support@automotivebypass.com and we will confirm fitment.

Ordering details

Free standard shipping covers the contiguous US, with dispatch in 1–2 business days and 3–4 days on the road after that. You have 45 days to request a return (pre-approval required, 20% restocking fee, buyer-paid return shipping). The module is backed by a 3-year limited warranty. For order or fitment questions, write to support@automotivebypass.com between 9 and 5 Pacific, Monday through Friday.