When accelerating or going up incline car starts to smell like carbon monoxide (like the heater is on). Circulation is within car. In order to get out must put on outside circulation and roll down windows.

- Saint Bernard, LA, USA

I purchased my new car during October 2015 from dealer in va. After some time, driving the car noticed an odor like rotten egg comes and goes. However, I thought, it could be due to the new car. Later time, I noticed every time I drive the car, I feel tired, having headaches, lack of energy, and falling sleep. I consulted with my doctors and they really did not find anything. Until recently, watching chanel 4 news and they were reporting the problem with Explorer exhaust system and possible carbon monoxide leak into interior of the car. Please advise if this issue is accurate and what we have to do to fix it. Thanks

- Ashburn, VA, USA

I have a 2016 Ford Explorer limited edition under my dads name and my wife is the primary driver on it. After getting our car I drove it daily as commuter for 2 months and sometimes I smell something bad inside like burned tires but I just ignored it because I said my car is bnew and maybe its from outside and after that my wife start driving it but last December 2016 we went to vegas and I janssen (husband) is the one driving on the car and smelled something burned tires inside the car while cruising on it, I checked the tires/break outside but I dont smell it from outside, so after that we went to our dealer and checked it found out theres a carbon monoxide present inside and they fixed it by covering the holes of the car that may be the entry of smoke from outside and updating the system as per service guy told me "rene" and said everything works well now. After few months it was June 2017 I smelled it again and concerned me more because my wife is pregnant and I know CO2 is really bad on our health and I know that because we are both nurses and we sent it back to the dealer and my service guy "luis " told me they put some rubber in the rear door for the purpose of sealing the door that maybe the smoke from the exhaust is the one causing it and take note " the car stays 1 week in the service department". and now Sept 2017 the same thing is happening and I called my dealership, I spoke to luis and casey and they told me there's still waiting for the service manager because they are bussy, I told them my concern that my wife is pregnant she's on 8 months now and it makes me really concerned of what is going on with the car but they just told me to wait, and my wife daily car is it. So incase something happen with my family this is not really safe for us, so I really need a big help from you NHTSA that we can solve this problem, I heard others too esp police.

- Norwalk, CA, USA

Since I have purchased the vehicle in February 16 it has been back for service nurmous times, starting 2 days after delivery! major complaint has been coolent loss and burning coolant smell following with a oil leak at the same time. This is a new vehicle 10 miles on it shouldn't have these issues so I demanded a different vehicle, was refused due to demographics! well the dealer brushes everything off as all do say it's normal it happens, as time passes it goes back to the dealer for same issue they replaced a oil seal again and coolant loss and smell is normal to them, they can't find any issues, I tell them it's after long drives well each time they have it over a week. To boot they ignore my complaint about the rotten egg smell I get on acceleration! they tell me it's probably the gas I'm using, mind you this is verbal after the fact, they did not want to put it on the work order. They ordered a new steering wheel due to it peeling. I was also told that technically I am responsible for the diagnosis if they do not find anything wrong and that I had to cover the techs time, well I have to take it back in again for no coolant in the overflow foul smell coming from the vents and exaust smell in the cabin. The vehicle has 14900 mi should not have these problems espicaly costing what it did

- Garfield Hts, OH, USA

When driving the vehicle uphill or accelerating onto the highway or freeway there is a strong exhaust odor in the cabin of the vehicle coming from the vents. It was detected earlier this year, however we did some extra driving through the summer to confirm the issue. Once confirmed, we took it to our Ford dealer. They could not recreate the issue, but had an idea as how to fix the issue. To fix it, they had to get approval from Ford corporate to do the fix. Ford corporate told them there was no issue since it could not be recreated, and we can pick up the vehicle at any time. The vehicle was dropped off at our dealership on August 31, 2017. We were notified today (Sept. 7, 2017) that the vehicle has no issue; that the problem is not on the civilian Explorer.

- Kalama, WA, USA

2016 Ford Explorer XLT V6 ti-vct flex fuel vehicle (FFV). Exhaust enters cabin during acceleration. Putrid odor of exhaust resembles a foul blend of vomit, rotten eggs, burnt hair, burnt wax. Headache and horrible smell lingers in sinuses continues to day following exposure. Stench is much worse under heavy acceleration and/or driving uphill with rear A/C on high fan speed. Ford service acknowledged wide-spread problem performed tsb 17-0044 sealing underbody seams, reprograming rear A/C and replacing exhaust components. Tsb 17-0044 is ineffective and problem persists. 1. Ford has not isolated source of excessive carbon monoxide (co), hydrocarbons (hcs) and nitrogen oxides (nox). Is engine deflection under acceleration impacting exhaust manifolds causing leakage in pipe joints" is rich fuel mixture in engine with unburned fuel producing elevated catalytic temperatures damaging manifolds or joints? are FFV engines fitted with undersized or faulty catalytic converters? 2. exhaust system fails to expel exhaust away from vehicle. Ford acknowledges as evidenced by tsb 17-0044 replacing mufflers and exhaust tips. 3. exhaust gasses pool in bumper cover and numerous cavities under body. 4. air conditioning system fans actively pull exhaust into the vehicle likely through air extractor vents in quarter panels. Ford acknowledges as evidenced by tsb 17-0044 replacing air extractor vents and reprogramming rear A/C to slow or halt fans under various braking scenarios. Ford misrepresenting elevated co levels only found in police interceptors. After Ford service sealed seams per tsb 17-0044, I detected 17 ppm of co in two detectors. Ford must evaluate every exhaust component under loading for deflection and excessive heat. Can exhaust enter via mid body, engine compartment or cowl in addition to rear of vehicle" pics illustrate rear infiltration.

- Chandler, AZ, USA

The contact owned a 2016 Ford Explorer. While driving approximately 70 mph, the four wheel drive warning indicator illuminated a "temporary disable" message. The contact stated that smoke appeared under the hood, from the rear of the vehicle, and through the air vents. The driver coasted over to the side of the road and the engine burst into flames. The fire originated from underneath the front of the vehicle. The fire department extinguished the fire. Neither a fire nor a police report were filed. The vehicle was towed to a towing lot. The vehicle was destroyed. The contact called kunes country Ford Lincoln dealer (located at 2811 N locust St, sterling, il 61081) and was informed to contact the manufacturer. The contact called the manufacturer and referred to his insurance co. The manufacturer did not offer further assistance. The approximate failure mileage was 23,000.

- Rock Falls, IL, USA

For the past year I have smelled exhaust in my brand new vehicle. About 9 months ago I had it tested at Ford dealership service dept for possible carbon monoxide because the exhaust smell was bad, particularly when hitting speeds around 70mph. Ford laughed at and said there is nothing wrong. The smell continued, myself and my daughter would get headaches, shortness of breath and I would feel nauseous after driving a long period of time. Earlier this week I was so dizzy, I needed to pull over twice just to gain my Focus. I purchased a carbon monoxide tester. Yes, there is carbon monoxide. I am a bit frustrated since the issue could have been fixed previously, rather than laughed at me and I endured poor health for so long.

- Queen Creek, AZ, USA

When doing a hard acceleration (I.e.. merging onto a highway), exhaust smell enters the vehicle through the vents. I've brought this issue to my dealer's service department for the 1st service and was informed that there was a tsb on this problem. The second time I brought the vehicle in for service I mentioned it again. This time, they kept the vehicle and tried to fix it by installing plugs on rear hatch, resealing body seams at the rear of the vehicle, and apply rubberized coating. This did not solve the problem. When I brought the vehicle in for service in May 2017 I told them I still had the problem. At this point, service dept indicated they still haven't figured out what is causing the problem. I purchased this vehicle in January 2016 and started noticing the problem after I'd had the vehicle a few months. This problem occurs almost every time when hard accelerating. The exhaust smell lasts from 2-5 minutes. This problem may occur multiple times during a drive. I don't know whether the fumes are continuing into the vehicle once I can't smell it anymore.

- Scottsdale, AZ, USA

The contact owns a 2016 Ford Explorer. While driving between 55-60 mph, there was an abnormal odor entering the vehicle through the air conditioning system. The vehicle was not taken to be diagnosed or repaired. Causeway Ford (located at 375 NJ-72, manahawkin, NJ 08050, (609) 597-8083) and the manufacturer were notified. The approximate failure mileage was 4,492.

- Barnegat, NJ, USA

The contact owns a 2016 Ford Explorer. While driving various speeds, carbon monoxide entered the vehicle through the air conditioning vents, which caused the contact to have headaches and nausea. Medical attention was not required. The vehicle was taken to the dealer (autonation Ford katy, located at 20777 katy fwy, katy, tx 77450; (281) 305-8949). The dealer stated that they ordered the parts and were waiting for them to arrive. Once available, the dealer would repair the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was not contacted and was not made aware of the failure. The failure mileage was 26,000.

- Katy, TX, USA

When speeding up to pass or accelerating rapidly you smell fumes in the car which make you sick and light head

- Molino, FL, USA

Exhaust fumes getting inside the car. Took the SUV to the Ford dealership on 8/11. Technician diagnosed and confirmed that carbon monoxide were detected in the interior of the car while driving. Told to bring back car after part's are ordered. Got a call 8/16 that parts are backed ordered as so many owners has brought their SUV's in with the same problem. It will take 2-3 weeks to get the parts and 1.5 days of work. SUV was purchased on 7/4/2016. This issue has been there since day one as I ignored it thinking as a new car, it needs to run for sometime before the smells goes away. After 3 months, thought will wait till the first oil change. That's the big mistake I made, should have taken it earlier. Unfortunately, with work, was not able to leave the car at the dealership.

- Houston, TX, USA

While driving onto the on-ramp of interstate, the vehicle's ac automatically moved to recirculation mode and I begin to notice a foul smell emitting from the engine compartment. I also noticed that this event would occur any time the engine rpms were above 2700-3000 when the vehicle would up-shift to on-ramp, passing vehicles to change lanes or regular acceleration. After my travel yesterday from being on the road for a period a little over an hour, I began to feel nauseous and lite headed. I still have the same symptoms on 8/14/2017. I will be taking the vehicle in to Ford dealership from which I made the vehicle purchase in order for them to conduct a check on the vehicle for what I believe to be carbon monoxide leaks from either the engine cabin, rear exhausts or a combination of both. I am fearful this is affecting my family and possibly endangering our livelihood as I commute daily in the vehicle and its our only family vehicle as the primary means of transportation.

- Lorton, VA, USA

There is a smell of exhaust inside the cabin of our Explorer at times when driving on the freeway and when our air conditioning is on, recycling the air inside the vehicle. This smell gives our teenage daughter headaches, and we are concerned that it could cause other health issues over time. Living in Arizona, we cannot just turn off the ac when it is 110-117 degrees outside. We have taken it into our local Ford dealer three times and they said that they have done three repairs, including removing the back bumper and sealing some gaps, replacing the ceiling air vents and adjusting the software in the vehicle. None of these have fixed the issue, however, and the dealer's service department says that they have done all the repairs that they know how to do, per the instructions from Ford corporate. They recommended that we call Ford corporate customer service, but after two weeks of waiting for a "good faith review, " the regional customer service manager informed us today that we do not meet the requirements for a buy-back, and we should just take it to another Ford dealer for a second opinion on the repairs, or buy a new vehicle and trade ours in. We are very concerned about this issue, but don't want to lose a lot of money trading it in, as the value has depreciated severely in the year since we purchased the vehicle.

- Peoria, AZ, USA

Under acceleration, there is an exhaust small inside the vehicle, and I've measured carbon monoxide levels up to 19 ppm.

- Murphy, TX, USA

The contact owns a 2016 Ford Explorer. While driving approximately 65 mph, the vehicle lost power and the service "wrench" warning indicator illuminated. The vehicle was coasted to the side of the road and was towed to the dealer (northtown Ford in menomonie, wi) where the throttle body was replaced. The failure recurred and the same dealer replaced the retaining clip, but the failure recurred. The contact made the manufacturer aware of the failures and requested a buy-back. The contact was informed that the issues did not warrant a buy-back. The vehicle was not repaired. The failure mileage was approximately 9,000.

- Stockholme, WI, USA

Just purchased the vehicle from a dealer 60 miles away from home. Driving home on the highway, upon full throttle acceleration with windows closed and ac set to recirculate, the cabin filled with exhaust fumes with the telltale rotten egg smell. Once windows were opened and exhaust fumes exited the vehicle, I closed the windows and noticed no more exhaust smell until I performed a full throttle passing maneuver and the smell returned again, prompting me to open windows again to clear the air. After the second incident, I drove the rest of the way at normal throttle with no more exhaust odors occurring. This was very disappointing for a $41,000 vehicle.

- West Allis, WI, USA

While driving and putting load on the engine, there is a smell of exhaust in the cabin. This is more noticable when the ac is on recycle air.

- Elk Grove, CA, USA

When driving the car, upon accelerating, even with the circulating air on, the fumes are very strong coming into the cabin of the car. Also, when first starting the car with the A/C on, there is a very sour/stale odor coming from the vents. We made a 2 hour trip, and after being in the car that long, I had a bad headache and felt nauseated from the fumes. I am the main driver of the car and it is my sole source of transportation. Ever since we purchased the car back in January of 2017, I started getting bad headaches and have then on a regular basis. I'm starting to think they are coming from this car. It has been in a Ford garage numerous times since we purchased it but they say everything checks out ok.

- Caldwell, OH, USA