Ford Explorer Exhaust Smell In the Cabin

By the Radman Auto Repair team, independent auto repair in Etobicoke since 1999 · Updated November 2026

Many 2011–2017 Ford Explorers let exhaust fumes into the cabin, usually under hard acceleration with the A/C on recirculate. Gaps in the rear body seams, worn liftgate drain valves and exhaust leaks let fumes in. Exhaust contains carbon monoxide, so treat any exhaust smell inside the car seriously.

Symptoms

What Causes It

Before You Start

• Park on level ground, set the parking brake and chock the wheels. Never work under a car held up only by a jack: use rated jack stands.
• Let the engine and exhaust cool before you touch them; coolant systems are under pressure when hot.
• Wear safety glasses and gloves, and disconnect the 12V battery before unplugging electrical parts or working near airbags.
• Check for open recalls on your VIN (Transport Canada or the manufacturer’s site) before you buy parts: a recall repair is free at the dealer.
• If anyone feels dizzy, sleepy or gets a headache, open the windows and stop driving until it is checked: carbon monoxide has no smell of its own.
• Never run the engine in a closed garage while testing.

Step-by-Step: Ford Explorer Exhaust Smell

1. Fit a CO detector. Put a portable carbon monoxide detector in the cabin while you diagnose the problem.
2. Check your VIN. Ask a Ford dealer whether the exhaust-odour bulletins and program were done on your Explorer.
3. Note when it happens. Record whether it happens on acceleration, at idle, or with recirculate on.
4. Inspect the exhaust. With the engine cold, look for black soot marks, cracks or loose joints from the manifolds back.
5. Check the air extractors. Behind the rear bumper corners, check the air extractor flaps are present, flexible and closing.
6. Check the rear seams. Open the liftgate and remove the rear trim to check the body seams and tail light seals for gaps.
7. Seal and replace. Seal any gaps with seam sealer and replace worn air extractors.
8. Retest. Drive with the CO detector and the A/C on fresh air and on recirculate to confirm the smell is gone.

When to Stop and Bring It In

• The CO detector shows readings above zero while driving.
• There is a cracked exhaust manifold or leak you cannot reach: see exhaust repair.
• The smell continues after the bulletins and sealing.
• Anyone in the car has headaches or drowsiness.

Not sure, or out of time? Radman Auto Repair in Etobicoke does this repair every week. Book online or call (416) 742-4521.

Also Known As

Owners describe this as “Ford Explorer exhaust smell”, “Explorer carbon monoxide”, “exhaust fumes in cabin when accelerating”, “Explorer rotten egg smell inside” or “Explorer CO leak”. Ford calls the rear drain valves “air extractors”.

Frequently Asked Questions

See also Ford Repair & Service, Exhaust Repair, Multi-Point Inspection, DIY Repair Guides by Manufacturer.

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