Answer

In Jain Dharma, Dussehra is not traditionally a Jain ritual festival for doing pooja of vehicles, putting haar on vehicles, or decorating home gates.

These practices are generally part of regional Hindu/customary traditions, especially connected with ideas like Ayudha Puja, victory, prosperity, or auspiciousness.

A Jain may decorate vehicles or the home as a cultural custom, but it should not be understood as a core Jain religious requirement.

Explanation

From a Jain perspective:

• Pooja is mainly offered to Arihant Bhagwan, Siddha Bhagwan, Tirthankars, scriptures, temples, and sacred Jain symbols — not to vehicles or material objects as worship-worthy beings.
• Vehicles, tools, gates, and possessions are worldly objects. Jain Dharma teaches us to use them responsibly, with awareness and non-attachment.
• If someone puts a haar on a vehicle or decorates the house on Dussehra due to family or local tradition, it is a cultural practice, not a Jain religious duty.

Spiritual Understanding

For a Jain, the more meaningful way to observe any day is:

• Do Jin Puja or darshan of Bhagwan.
• Practice Ahimsa in driving and daily life.
• Use vehicles carefully so no living beings are harmed.
• Avoid pride, show-off, and attachment to possessions.
• Do Swadhyay, Samayik, Pratikraman, or charity.

If decorating is done, it should be done simply and without violence, waste, superstition, or attachment.

Takeaway

In Jain Dharma, vehicle pooja or putting haar on vehicles/home gates on Dussehra is not a required Jain practice. If done, it is best seen as a social or cultural custom, while the true Jain focus should remain on Ahimsa, right conduct, devotion to Tirthankars, and detachment from material things.