Quick answer

Using navigation-map data, the climate system can switch to recirculation about seven seconds before a tunnel.

Before you start

Check that your vehicle has it.

Availability

If equipped; the 2025 U.S. gas specification lists onboard navigation on SEL Convenience and Limited.

Retail trim / version
SEL Convenience, Limited
Required equipment / service
Built-in navigation/GPS and tunnel recirculation setting, SEL Convenience and Limited gasoline/ICE trims with onboard navigation
Compatibility check

Does the documented scope match your car?

This check combines the verified year, any source-supported powertrain scope, source-named trim/package and required equipment. It does not read a VIN or factory build record.

Source-named equipment or service
  • Built-in navigation/GPS and tunnel recirculation setting
  • SEL Convenience and Limited gasoline/ICE trims with onboard navigation
Can you see the required control, menu or equipment on your vehicle?
Published availability and qualifications

If equipped; the 2025 U.S. gas specification lists onboard navigation on SEL Convenience and Limited.

Visual orientation

Know what kind of control to look for.

This original category diagram is an orientation aid, not a picture of your exact trim. Use the written labels and your vehicle manual to identify the real control.

Climate & air quality orientation diagram for Hyundai Tucson
Climate & air quality orientationOriginal visual guide · controls vary by trim · not to scale
How to use it

Step by step.

  1. 01

    Open Setup > Vehicle > Climate > Recirculate Air.

  2. 02

    Enable Activate upon Entering Tunnels.

  3. 03

    Leave the climate intake in fresh-air mode so the automatic change can occur.

!

Important limits

  • It may not work in short tunnels. Recirculation can fog the windshield; use defrost immediately if needed.
Owner feedback

What happened on your vehicle?

Your response is stored on this device. If you separately allow analytics, a non-account-linked guide/result event may also be measured. No VIN or personal information is requested.

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Primary evidence

Hyundai Owner's Manual — Recirculating Air When Entering a Tunnel

Relevant section or page: 5-125. We use the written official source to determine the steps and applicability shown above.

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Editorial record

Reviewed with a visible trail.

Scope and steps were checked by Car Cheat Codes Editorial Review. A guide is narrowed or corrected when the source does not support a broader claim.

Published
Last modified
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Guide change history
  • Initial verified publication.
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