Acura
TSX
Owner report available
Lexus
IS
Owner report available
Acura TSX vs Lexus IS
The short answer
The Acura TSX offers fuel economy, while the Lexus IS excels at power instead. Choose the Acura TSX if you prioritize fuel economy in daily driving, or the Lexus IS if power matters more for your needs. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
TSX
Overall
Owners broadly regard the TSX as a reliable, practical, and engaging car, with the K24 four-cylinder engine and its long service life drawing the most praise. The wagon body style is treated as rare and desirable, though many owners argue that rarity does not justify premium asking prices on high-mileage examples. Criticisms center on oil consumption, VTC actuator rattle, timing chain concerns, and expensive parts for the first generation.
Best version to buy
Insufficient owner data available to declare a consensus, though the strongest signal favors the 2007-2008 first-generation cars, which owners describe as having the refreshed engine and most of the earlier issues resolved. Owners repeatedly advise avoiding the 2004 model year and recommend 2005 and newer.
Known issues
- Oil consumption: Frequency: recurrent. VTC actuator rattle, sometimes appearing as early as 60k miles: Frequency: recurrent. Timing chain rattle on cold start: Frequency: recurrent.
IS
Overall
Mixed sentiment heavily dependent on generation and powertrain. The IS is widely recognized for its strong long-term reliability, comfortable ride, and luxury feel, particularly when compared to German competitors. However, significant and recurring criticisms are directed at specific mechanical flaws, outdated powertrains, and poor fuel economy.
Best version to buy
IS 350 with the 2GR-FSE V6 engine is the most frequently recommended version for its superior power and reliability over the IS 250. For the third generation (3IS, 2014+), the 2015-2016 model years with the V6 and 6-speed automatic transmission are specifically highlighted to avoid the later UA80 transmission used in 2017+ models.
Known issues
- Carbon buildup on intake valves (IS 250 with 4GR-FSE engine): causes loss of power, rough idle, poor fuel economy, requires periodic cleaning. Frequency: very frequent.
- Water pump and front cover oil leaks (2GR-FSE V6 engine): common failure requiring expensive repair (engine removal for front cover, ~20-25 hours labor). Frequency: very frequent.
- Severe diesel engine issues (IS220d with 2AD-FHV engine): chronic DPF filter and EGR valve clogging leading to very high fuel consumption, potential for catastrophic engine failure (head gasket, seals) especially with poor maintenance.
The verdict
The Lexus IS is the better choice for most buyers.
It has stronger reliability sentiment in owner reports than the Acura TSX, based on the data above. If the specific known issues on the Lexus IS are a dealbreaker, the Acura TSX is worth a closer look instead.
Explore further
Common problems by model year
Other comparisons
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Frequently asked questions
Which is more reliable, the Acura TSX or the Lexus IS?
Owner reports lean more positive on reliability for the Lexus IS than the Acura TSX. See the known issues comparison above for the specific concerns owners report on each.
Which is better for families, the Acura TSX or the Lexus IS?
Data on family-specific factors like cargo space is limited for one or both models, but based on available reports, both are positioned as practical daily drivers. Check the specs table above for seating and body type.
Which has better fuel economy, the Acura TSX or the Lexus IS?
The EPA rates the 2014 Acura TSX at 22–25 mpg combined and the 2026 Lexus IS at 22 mpg, depending on the version.
Which is cheaper to maintain, the Acura TSX or the Lexus IS?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Lexus IS than the Acura TSX. See the known issues comparison above.