Pick the engine, not the year. The 2.0T is the safe Accord — a 1.5 turbo only with receipts.

The head-gasket engine — the one real walk-away risk in the range. The 1.5-liter turbo arrived with the 2018 redesign and is the reason this page exists. The head gasket lets coolant into the combustion chamber: the reservoir drops, the engine misfires on cold start (often a single cylinder), it warns and limps, and driven on it can warp the head or destroy the engine — mechanics say Honda's own answer is frequently to replace the whole engine. Owners in the federal file were quoted $6,500 and $7,000, with dealers acknowledging a known generational problem. Critically, there is no recall and no warranty extension: Honda's dealer messages show it hunting for misfiring (P030X) 2018–2022 cars for years without ever extending coverage, so the bill is the owner's. Riding with it: cracked or leaking direct injectors (~$2,400, also inside that uncovered misfire investigation — not a recall), a turbo that can stop building boost near 100k (~$2,400), and fuel diluting the oil in cold-climate short-trip use, which accelerates the whole chain. It gets rarer after 2019 but never gets a program. Technicians report the same failure appearing early on the 2023 engine, while cautioning it is too soon to call. Cold-start any 1.5T, watch the coolant level, and look for milky oil.

The safe-harbor engine of the tenth generation. The 2.0-liter turbo — paired with a ten-speed automatic rather than the CVT — draws no head-gasket cluster in the federal file and no drivetrain failure pattern; our 2022 report calls it the pattern-free engine, and a long-term owner transcript describes four years and zero issues beyond stereo and road noise. What exists is minor and investigation-grade rather than program-grade: Honda ran internal investigations into a 2018 acceleration-delay/check-engine complaint and a 2020–21 oil leak, and owners in humid climates note intercooler condensation. One honest caveat: the mechanic who documents the 1.5T's gasket failures says he is beginning to see it on some 2.0-liter cars too — it is not a cluster in the data, but it is not a certified impossibility either. If you want a 2018–2022 Accord without the argument, this is the badge to look for.

Different drivetrain, different failures — mostly brakes and drive power. The hybrid pairs an Atkinson-cycle four with a two-motor e-CVT that mechanics rate highly — 'leaps and bounds ahead of any automatic or CVT,' with only two motors and a solenoid to fail. Its problems are its own. The 2017 hybrid's file is dominated by brake failures: the dash lights up (Brake System, VSA, Collision Mitigation, Adaptive Cruise) and the pedal loses assist, traced to the brake tandem-motor-cylinder — Honda issued a free product update for it, not a recall, so check it was done. The 2020 hybrid falls in recall 20V-798 (DC-DC converter shutdown → loss of drive power, free software fix). The 2023 hybrid carries two loss-of-drive-power recalls — an improperly-manufactured e-CVT (23V-588, free replacement) and a control-module CPU reset (25V-785, free reprogramming). Chronic annoyances are active-noise-control droning (2018–2020, worse when cold, often not cured by part swaps) and phantom braking. The head-gasket failure does reach the hybrid: the file's $7,000 quote is a hybrid, and a 2022 hybrid shows coolant in the cylinders. One ownership rule mechanics stress: the battery is air-cooled through a vent under the back seat — never block it.

The pre-turbo four — the quiet one. The ninth generation's 2.4-liter K24 is naturally aspirated, chain-driven, and — in the words of the mechanic who documents the later failures — has 'no common head gasket failures, unlike the 1.5 turbocharged motors from the 10th generation.' Its two habits are gradual oil consumption (worst case a quart per 1,000 miles, tied to short trips and stretched oil changes more than to a hard defect) and a starter that most owners replace at least once. Both are checkable on a test drive and cheap next to what the next generation brings. A replacement engine, if it ever came to that, runs about $800 in a mechanic's market — a reliability signal in itself.

The ninth-gen V6 — fine, if its fluids were respected. The 3.5-liter V6 has no engine-failure pattern, but it has two specific appetites. The VCM (variable cylinder management) solenoid leaks oil onto the alternator — a known mechanic flag. And its six-speed automatic's fluid wears out and burns faster than owners expect: the advice is a change every 15,000–20,000 miles rather than trusting the 'lifetime' assumption, and a V6 with documented short transmission-service intervals is the one to buy. The starter can also chew the torque-converter ring gear (a service-bulletin item). One V6-only recall applies to 2016–2017: 19V-060, where particulates can degrade the low-pressure fuel pump and stall the engine (free ECU update and pump replacement if needed).

The transmission behind both non-turbo and 1.5T fours. Every four-cylinder Accord here except the 2.0T runs a CVT, and mechanics are consistent: it is genuinely reliable, but it does not tolerate neglect the way an old Honda automatic did. Change the fluid on schedule with genuine Honda fluid; a used replacement runs roughly $1,500–$2,000. Honda has twice reached into it — belt-slip and incorrect-operation software product updates on 2015–16 cars (the customer letters literally promise to 'prevent permanent damage'), and a 2021 owner notification for a small batch whose driven pulley wasn't properly hardened, which can bring slippage or noise. On the early 1.5T cars (2018–2019) the CVT can hesitate and shudder, with belt wear surfacing after about 80,000 miles and an overhaul quoted at $3,000–$5,000. Drive it in stop-and-go traffic, and ask for the fluid history.