Model Year Range Engine Code Primary Risk to Avoid 2008-2014 EJ257 (Turbocharged) Wastegate failure and piston ring lands 2004-2009 EJ204/EJ205 (Turbocharged) Oil pump failures and head gasket issues 2015-2020 FB20 (Direct Injection) Carbon buildup on intake valves Direct Injection Complications. Owners of vehicles from the 2000s and 2010s should be acutely aware of the limitations of the factory turbocharged units.
Worst Subaru Engines Buyers Guide
Additionally, the tight packaging of the engine bay means that diagnosing issues often requires significant labor, making preventative maintenance the most cost-effective strategy. Generally, these engines are well-regarded for their durability; however, specific years within the late 1990s and early 2000s warrant caution.
5-liter variants found in later WRX and Legacy models. While Subaru has built a reputation for reliability, not every generation of their horizontally-opposed engines is created equal.
Worst Subaru Engines Buyers Guide
Focus on the Boxer Engine Design The Subaru Boxer engine layout places the pistons horizontally, which lowers the center of gravity but creates unique maintenance challenges compared to a standard V6. Models produced between 1996 and 2000 are particularly susceptible to head gasket failure if the cooling system was not meticulously maintained.
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