2020-2025 Toyota Highlander Auto Start Stop Eliminator | Console Memory Harness

A console memory harness for the 2020–2025 Toyota Highlander. Out of the factory, Stop & Start comes back on at every key cycle. This module remembers your last choice and sends it again at the next start. It fits at the console switch bank that holds the stop-start button, between the switch and its factory connector.

You can still use the original button at any time. Whatever you select last is what the module repeats on the next start. Take the module out and the vehicle behaves exactly as it did from the factory.

Which Toyota Highlander models it fits

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

• Toyota Highlander: 2020–2025

The listing is written around the fourth-generation (2020-up) Highlander. 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

The factory logic arms Stop & Start every time the engine starts. Turning it off with the button only lasts until the engine is shut down. Owners who sit in stop-and-go traffic, tow, or idle in drive-throughs often prefer it off, and that is where the repeated button press comes from.

Day-to-day use

Some owners only want stop-start off in certain seasons or on certain trips, such as towing a trailer or crawling through summer traffic with the A/C working hard. Because the module remembers whatever you chose last, it works both ways: leave the system off for a week, then switch it back on with the factory button and it stays on.

When the engine will not auto-stop anyway

Even with Stop & Start enabled, the engine control logic only stops the engine when conditions allow it. Typical blockers are a low battery state of charge, an engine that has not reached operating temperature, heavy heating or A/C demand, steering input, an open door or unlatched seatbelt, and some drive modes. If the system never seems to stop the engine, one of these is usually the reason, and the module does not change that logic.

A note on the battery

Vehicles with stop-start normally use an AGM or EFB battery sized for repeated restarts. If you replace it, use the same type and size, and follow the manufacturer's battery reset or registration step where one exists. A wrong or unregistered battery can leave the stop-start system disabled, and that has nothing to do with this module.

Before blaming the module

A dead or weak battery, a charging problem or an unrelated module fault will change how Stop & Start behaves with or without this part installed. Scan the vehicle for stored codes, test the battery and confirm the system works normally with the factory button before installation. That baseline makes any later issue easy to pin down.

Scope of the module

• It leaves the factory button working, so you can turn stop-start back on whenever you want.
• It does not change engine power, transmission shifts, emissions calibration or fuel trims.
• It remembers the last stop-start setting through a key cycle.
• It does not write anything to the vehicle's modules, and removing it restores the stock default.

Where it connects

It fits at the console switch bank that holds the stop-start button, between the switch and its factory connector. Disconnect nothing else and splice nothing. Once both plugs are locked, tuck the harness where it will not be pinched when the panel goes back on. Test by switching Stop & Start off, cycling the ignition and checking the indicator.

Confirm these points

• Model year and model match a row in the table above (2020–2025 Toyota Highlander).
• Your Toyota Highlander has the factory stop-start button. Base trims or engines without stop-start have nothing for the module to remember.
• The connector at your install point matches the one in the product photos.
• 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.
• If you are unsure, send your VIN to support@automotivebypass.com and we will confirm fitment.

Warranty and returns

Standard shipping inside the lower 48 states costs nothing; allow 1–2 business days of handling plus 3–4 in transit. Returns need approval first and must be requested within 45 days. Approved returns are subject to a 20% restocking fee, with return shipping paid by the customer. A 3-year limited warranty applies. Email support@automotivebypass.com (Mon–Fri, 9–5 PST) with your VIN if you want a fitment check.