The Nissan Frontier is a midsize ... issues with the check engine light, engine coolant mixing with transmission fluid, and engine noises. Many Frontier owners said the engine coolant and ...

Introduced to the U.S. market in 1997, the Nissan Frontier quickly established ... this overhaul introduced a severe design flaw in the cooling system. The radiator had a tendency to leak coolant ...

The Nissan Frontier ... emission control system) canister vent valves, and clogged EGR (exhaust gas recirculation) valves. Many Frontier owners said the engine coolant and transmission fluid ...

The Frontier benefits from a strong powertrain and a modern infotainment system, but it still suffers from a rough ride. It scores better than its traditional midsized pickup-truck competitors ...