2018-2024 Audi SQ5 Auto Start Stop Eliminator | Plug & Play

A plug-and-play memory harness for the 2018–2024 Audi SQ5. Out of the factory, start-stop system comes back on at every key cycle. This module remembers your last choice and sends it again at the next start. 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.

Fitment

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

• Audi SQ5: 2018–2024

Trim is not listed separately. Any trim in these years with factory stop-start and the pictured connector is covered.

How start-stop system behaves from the factory

start-stop system is designed to default to on. The off switch (usually marked with an "A" inside a circular arrow) cancels it for the current drive. At the next start the system is armed again. That reset is intentional on the manufacturer's side, and it is the only behavior this module changes.

Day-to-day use

Stop-start saves the most fuel in long idles, but plenty of drivers would rather keep the engine running. Common reasons: towing or hauling, where an engine restart under load is unwelcome; drive-thru lines and parking lots, where the engine cycles on and off every few feet; hot days, when the A/C compressor stops with the engine on many vehicles; and stop-and-go traffic where the restart delay is noticeable when pulling into a gap. On a daily driver, any of these can mean a button press at the start of nearly every drive.

Connecting it

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. Work with the ignition off. Seat each connector until its lock engages, then secure the module with the supplied ties or tape so it cannot rattle or touch pedals, steering parts or anything hot. Start the vehicle, press the stop-start button once, then restart to confirm the choice is held.

Diagnostics first

A warning light that appears after installation usually means a connector is not fully seated. Switch the ignition off, reseat both ends until the locks click, and test again. If the light stays on, remove the module and confirm the vehicle is fault-free on its own before contacting support.

What the module does and does not do

• Leaves no permanent change after removal.
• Lets you re-enable the system with the factory button at any time.
• Leaves engine and transmission software untouched.
• Holds the stop-start button state between drives.

If stop-start is not engaging

Auto stop needs several conditions at once: a warm engine, enough battery charge, moderate cabin heating or cooling demand, and the vehicle fully stopped with the brake held. If any is missing, the engine keeps running. The module only remembers the button state; the factory controller still decides whether a stop is allowed.

Keep the battery healthy

Most stop-start systems watch battery condition closely through a sensor on the negative terminal. When the battery ages, the system quietly stops auto-stopping long before the battery fails to crank. Keeping the original battery type (AGM or EFB) and a clean, tight ground connection avoids a lot of confusion about why the system behaves differently from week to week.

Confirm these points

• Model year and model match a row in the table above (2018–2024 Audi SQ5).
• Your Audi SQ5 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.

Shipping and support

Shipping is free to the contiguous US. Orders leave in 1–2 business days and usually arrive 3–4 business days later. Returns are accepted within 45 days with pre-approval; a 20% restocking fee applies and the buyer covers return shipping. The part carries a 3-year limited warranty, and support@automotivebypass.com answers Monday to Friday, 9–5 Pacific.