For mainstream car shoppers, reliability is paramount, especially for daily drivers. This is why Toyota and Honda continue to dominate sales despite the rising popularity of SUVs. Yet, one engine quietly delivers exceptional reliability while remaining largely unnoticed: the Subaru FB25D. It may not be flashy, but its track record speaks for itself.
Subaru’s Steady Recovery and Growth
Subaru’s U.S. sales faced supply chain hurdles, dropping to 556,581 units in 2022. However, demand surged with the Crosstrek and Forester, pushing sales back up to 643,591 in 2025. This rebound coincides with Subaru balancing domestic production in Indiana against broader economic pressures, including new tariffs.
Despite these shifts, Subaru maintains a 4% market share, bolstered by strong dealer profitability and customer loyalty. While trailing Toyota (2.2 million units) and Honda (1.4 million units) in overall volume, Subaru’s consistent performance demonstrates a loyal customer base.
Subaru’s 2026 Lineup: Electrification and Utility
Subaru’s 2026 U.S. lineup embraces electrification with models like the Trailseeker EV and Uncharted, alongside staples like the Crosstrek, Forester, Outback, Ascent, Legacy, WRX, BRZ, and Solterra EV. The brand has streamlined its engine offerings around the FB25D—a 2.5-liter naturally aspirated Boxer engine that powers the Crosstrek, base and Premium Forester trims, and non-turbo Outbacks. Performance models retain the turbocharged 2.4-liter flat-four in the WRX and Ascent, and the 2.4-liter BRZ.
The FB25D: A Mechanical Workhorse
The FB25D delivers 180 horsepower and 178 lb-ft of torque. In the 2026 Crosstrek, it achieves 0-60 mph in 8.2 seconds, while the heavier Forester takes 9.2 seconds. Despite the difference, the Forester reaches a top speed of 127 mph compared to the Crosstrek’s 120 mph.
Subaru engineered the FB25D for longevity, using a high-pressure die-cast aluminum alloy block and heads to minimize weight while maximizing thermal stability. The engine’s open-deck design prioritizes cooling and reduces vibrations. Polymer-coated piston skirts and lighter connecting rods reduce internal friction by 28% compared to earlier iterations. A chain-driven valvetrain replaces unreliable rubber belts, and a Thermo Control Valve optimizes engine warm-up and fuel atomization.
Reliability Ratings: iSeeCars and J.D. Power
The 2026 Subaru Crosstrek with the FB25D scores 8.1/10 overall from iSeeCars, including 7.6/10 for reliability. The publication predicts a lifespan of 13.6 years or 165,900 miles, with a 24.8% chance of reaching 200,000 miles. J.D. Power gives the same model an 86/100 overall score, with 85/100 for quality and reliability, and 89/100 for resale value.
Potential Issues and Maintenance
Subaru’s 2026 models come with a standard 3-year/36,000-mile bumper-to-bumper warranty and a 5-year/60,000-mile powertrain warranty. The FB25D has proven reliable, though early models experienced excessive oil consumption. Some Subaru models have faced recalls, including Forester tailgate failures and software glitches affecting rear-view cameras.
Proper maintenance is critical: Subaru mandates 6,000-mile oil changes with 0W-16 synthetic oil. Major services occur at 30,000 and 60,000 miles. Periodic intake valve cleaning prevents carbon buildup, and coolant checks are essential to prevent overheating.
The EJ25’s Troubled Legacy
The FB25D is a direct response to the issues plaguing its predecessor, the Subaru EJ25. The EJ25 was prone to head gasket failures, piston ring cracks, and oil starvation due to a fragile oil pickup tube. It also required costly timing belt replacements every 105,000 miles. The FB25D addresses these shortcomings with improved design and materials.
The FB25D isn’t the most exciting engine, but its reliability and durability make it a standout choice in the mainstream car market. Subaru’s commitment to longevity ensures that this engine will continue to deliver value and peace of mind for years to come.
