2017 Nissan Titan

The 2017 Nissan Titan draws the heaviest complaint volume around the engine, which accounts for the clear majority of reports. Owners frequently describe complete engine failure, locked-up engines that won't turn over, sudden loss of power while driving, and internal knocking or vibration before shutdown. Several reports describe smoke and fire originating from the engine compartment or undercarriage, often with little or no warning. A recurring detail is that failures tend to surface in the 80,000–120,000-mile range. Powertrain complaints are the second most reported area, with owners describing transmission hunting for gears, shuddering, and the truck dropping into limp mode before stalling on the highway. Exhaust and catalytic converter issues appear in a smaller but consistent thread, with owners noticing fuel or exhaust odors entering the cabin, sometimes at idle or in stop-and-go traffic.