Vipul
•1dWhile driving my Tata Punch, I suddenly noticed that whenever I applied the brakes and shifted to a lower gear, the smell of petrol would spread inside the cabin. What could be the reason for this? It happened when the fuel tank had little fuel left. Could that be related to the issue? Because after refuelling the tank, I could no longer notice the smell while shifting to lower gears. Please advise.

Autocar India
This sounds like fuel vapour entering the cabin when you slow down and downshift. When the tank is very low, fuel tends to slosh around more, which increases vapour movement inside the tank. As you lift off the throttle and brake, the vapour control system becomes more active, and if there is a weak hose, loose connection or faulty seal, those vapours can escape near the engine bay or fuel filler area. The cabin ventilation system can then pull that smell inside. Filling the tank reduces the empty space in the tank, which can explain why the smell disappeared after refuelling.
Start with the simple checks. Make sure the fuel cap is tightened properly and clicks into place, and inspect the rubber seal on the cap for any cracks or damage. If the smell returns, get the car inspected soon. Ask the Tata workshop to specifically check the fuel lines for seepage, the tank vent and EVAP vapour lines, the purge valve, fuel pump seals and also for any rodent damage to smaller hoses near the firewall, which is not uncommon.
If the smell is strong, keep the windows open and avoid long drives until it is checked. In many cases it turns out to be a small leak or a loose hose, but because petrol fumes are a safety concern, it is worth fixing promptly.

Tata Punch
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Posted on: 13 May 2026
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