2017 Nissan Titan: gas smell in the cabin

Filed Nov 4, 2025 · Engine · 30,000 miles · CO

The contact owns a 2017 Nissan Titan. The contact stated that while driving at various speeds, there was an exhaust odor entering the cabin of the vehicle. The contact was forced to lower the windows to escape the foul odor. The contact stated that the failure occurred while the vehicle was performing the DEF (Diesel Exhaust Fluid) system operation. The vehicle was taken to a dealer, where the failure was related to the windshield cowl system not properly filtering the air. The contact was provided an estimate for the repair, and declined. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 30,000.

Filed Feb 17, 2020 · Engine, Fuel system · 14,883 miles · WI

Bought truck new in 6/2018 . Truck is new 2017 leftover nissan titan diesel xd with 16,000 miles to date. When truck goes into regen to clean diesel particulate heavy diesel exhaust fumes fill the cabin so bad you have to roll the windows down. It causes my stomach to become upset and dizzy tired feeling and later a very bad headache. Have had coworkers experience the same issue while in the vehicle.has been replicated at the dealer and service tech and service manager are out of ideas on how to fix this but confirm the issue exist. Dealer service manager has read about this but never has heard of a fix through nissan. Nissan is sending in and engineer to look at the issue but comment made from service manager is he has heard about the situation through nissan network but never has heard of a fix for it. Truck is still in warranty but not worth continuing to be sick or possibly pass out from it. Please be very aware of this issue and report any exhaust diesel smell to your dealer and elevate it. This is an extremely dangerous health and safety hazard. You should not smell any exhaust or diesel fumes in a vehicle. Hoping this site takes note of the many other folks on forums mentioning it and elevate it to nissan. Hoping nissan fixes or gives me my money back as the truck makes me feel sick.

Filed Sep 28, 2019 · Engine · 27,000 miles · WA

When the truck goes into regen mode the cab fills with exhaust smell while air is on and in the fresh air position. It is especially noticeable while stopped.

Filed Mar 6, 2019 · Engine · NY

Tl* the contact owns a 2017 nissan titan. While the vehicle was stopped, the contact smelled exhaust fumes inside the vehicle. West herr nissan of lockport (6069 s transit rd, lockport, ny 14094, (716) 280-6354) stated that the odor was normal. The manufacturer sent a representative to inspect the vehicle who agreed with the dealer. The failure mileage was 0.

Filed Feb 6, 2018 · Engine · 500 miles · SC

When the diesel engine goes into dpf regeneration mode, the cab of the vehicle fills with unpleasant fumes that smell like evaporated diesel fuel or other noxious substance that is irritating to mucous membranes and may cause health issues. The problem is worse when the vehicle is at low speed or in stop-and-go traffic when exhaust fumes are able to collect around the vehicle. The most recent instance occurred in a drive-thru line at a fast food restaurant, and was so pungent that I was forced to abandon the line, park the vehicle, and evacuate myself to fresh air.

Filed May 20, 2017 · Engine, Fuel system · TX

Very soon after I purchased the titan truck, randomly, while the car sits idle or while driving the truck anywhere (I.e. On city streets, on the highway, in my neighborhood) the truck produces a strong scent of diesel mixture/exhaust fumes in the cabin of the truck. The fumes are so strong it makes me dizzy. The diesel fumes/exhaust smell in the cabin when the def cycle is on as well. I've taken it to a nissan dealership at least four times to no avail at repairing it. I bought this truck as a new car.