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uk Transport & mobility emergencies

What to do if…
you smell exhaust fumes inside your car while stopped or parked

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Switch the engine off, get everyone out into fresh air, and do not stay in the car to see if it passes. Call 999 if anyone is seriously unwell; call NHS 111 if anyone has possible carbon monoxide symptoms such as headache, dizziness, nausea, confusion, weakness, chest pain, or breathlessness.

Do not do these things

  • Do not keep the engine idling while you troubleshoot the smell.
  • Do not sit in the vehicle with the windows shut or ventilation on recirculate.
  • Do not drive yourself to A&E if you feel unwell, lightheaded, confused, weak, or not quite right.
  • Do not assume it is harmless because you can smell exhaust; carbon monoxide itself has no smell.
  • Do not try to seal gaps with tape, cloth, or a roadside repair under the car.
  • Do not restart the engine in a garage, enclosed car park, or tight space to test whether the smell has gone.

What to do now

  1. Switch the engine off immediately, if you can do that safely. If the car is in a garage, enclosed car park, or close to a wall or doorway, turn it off and leave the area for open air.
  2. Get everyone out of the car and into fresh air. Prioritise children, pregnant people, older adults, and anyone who has been sitting inside longest.
  3. Do a quick symptom check. Look for headache, dizziness, nausea, vomiting, unusual tiredness, weakness, confusion, chest pain, muscle pain, or breathlessness.
    • Call 999 if anyone is struggling to breathe, suddenly confused, collapsed, cannot be kept awake, very weak, or has chest pain.
    • Call NHS 111 if anyone has symptoms you think could be from fumes or possible carbon monoxide exposure, even if they seem mild.
  4. If the car is in a dangerous position and must be moved a short distance, only do this if you feel completely well. Open the windows fully, turn off recirculation, set ventilation to fresh air, move only as far as needed to reach a safer open area, then switch off and get out again.
  5. If you feel unwell, leave the car where it is and call for help instead of driving. Use 999 for urgent symptoms, NHS 111 for medical advice, or a breakdown service for the vehicle.
  6. Reduce re-exposure. Keep the car off and do not re-enter to collect items unless essential. If you must get a phone, medication, child seat, or keys, open the doors and make one quick in-and-out.
  7. Arrange breakdown recovery or towing rather than driving on. Tell them there may be exhaust fumes entering the cabin while the vehicle is stopped or idling.
  8. Get the vehicle inspected before using it again. Tell the garage: “exhaust fumes smell in the cabin while stopped or parked,” and mention any symptoms, whether it happened with heating or air conditioning on, and whether recirculation was on.

What can wait

  • You do not need to diagnose the cause right now, such as an exhaust leak, blocked tailpipe, nearby vehicle fumes, or a ventilation intake issue.
  • You do not need to decide repair costs while you are stressed or symptomatic.
  • You do not need to air it out and carry on today.
  • You do not need to prove whether it was carbon monoxide before asking for medical advice.

Important reassurance

It is reasonable to feel alarmed: vehicle fumes can make people feel suddenly unwell, foggy, or panicky. Getting into fresh air and stopping the engine is the right immediate move and may help symptoms start to ease, but symptoms after possible carbon monoxide exposure still need medical advice.

Scope note

These are first steps only to reduce harm and buy time. A qualified mechanic may be needed to find and fix the source safely, and later medical decisions may need a healthcare professional.

Important note

This is general information, not medical, mechanical, legal, or professional advice. If anyone has symptoms after possible fume exposure, especially confusion, breathing difficulty, chest pain, severe weakness, or collapse, treat it as urgent and get medical help.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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