Acura
TLX
Owner report available
Lexus
IS
Owner report available
Acura TLX vs Lexus IS
The short answer
Based on available data, the Lexus IS comes out ahead of the Acura TLX on power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
TLX
Overall
Owners generally regard the TLX as a reliable, comfortable, and well-rounded car, with the 2.4L four-cylinder earning especially strong praise as "bulletproof" and capable of very high mileage with basic maintenance. The V6 is respected for its power and smoothness but is criticized for requiring a timing belt service and, in some cases, being prone to spun bearings. Newer 2021+ models draw complaints about brake rotors, puddle lights, and infotainment/tech glitches, though owners still describe the car as mechanically solid.
Best version to buy
Insufficient owner data available to declare a consensus. The 2.4L four-cylinder receives the most consistent praise for reliability and longevity, while the V6 is favored by owners who prioritize power.
Known issues
- Timing belt service required on V6 (approximately 100,000 miles or 7-10 years): Frequency: very frequent. Brake rotor warping and juddering, especially on 2021+ models: Frequency: very frequent.
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 However, significant and recurring criticisms are directed at specific mechanical flaws, outdated powertrains, and poor fuel economy.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 more power on its best-equipped version than the Acura TLX, based on the data above. If efficiency matters more to you than outright power, the Acura TLX is worth a closer look instead.
Explore further
Common problems by model year
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Frequently asked questions
Which is more reliable, the Acura TLX or the Lexus IS?
Owner reports show similar reliability sentiment for the Acura TLX and the Lexus IS. Check the known issues listed above for specific differences between the two.
Which is better for families, the Acura TLX 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 TLX or the Lexus IS?
The EPA rates the 2025 Acura TLX at 21–25 mpg combined and the 2026 Lexus IS at 22 mpg, depending on the version.
Which is cheaper to maintain, the Acura TLX 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 TLX. See the known issues comparison above.