Lexus
GX
Owner report available
Mercedes-Benz
GLS
Owner report available
Lexus GX vs Mercedes-Benz GLS
The short answer
The Lexus GX offers long-term reliability, while the Mercedes-Benz GLS excels at power instead. Choose the Lexus GX if you prioritize long-term reliability in daily driving, or the Mercedes-Benz GLS if power matters more for your needs. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
GX
Overall
Sentiment is sharply divided by generation. The previous-generation GX 460 (model years up to 2023) is overwhelmingly praised for its legendary reliability, proven V8 powertrain, comfortable and durable luxury, and high long-term value. Owner feedback describes it as a "bulletproof," over-engineered vehicle that benefits from decades of refinement, with a 10-year cost of repairs reportedly half that of competitors.
Best version to buy
For the GX 460 generation, the final model year (2023) is specifically highlighted as the "one to have" due to receiving the latest updates and a newer infotainment system with Apple CarPlay/Android Auto. The Luxury trim is highly recommended for its adjustable ride control (Comfort/Sport settings), which owners find invaluable for tuning ride quality on different road surfaces.
Known issues
- **GX 550 (2024+):** Major engine recall (V35A-FTS twin-turbo V6): Safety recall for machining debris causing potential bearing failure and catastrophic engine seizure. Linked to broader issues with Toyota/Lexus's new turbo engines.
- **GX 460 (Pre-2024):** KDSS system leaks: Failure of the Kinetic Dynamic Suspension System front piston, leading to expensive repairs ($4,000+). Frequency: recurrent.
GLS
Overall
Sentiment is sharply divided and heavily dependent on ownership phase and powertrain. The vehicle is universally praised for its core attributes: exceptional ride comfort, often described as "like a magic carpet," spacious and comfortable third-row seating, a luxurious and well-appointed interior, and strong, smooth V8 performance in 550/580/63 models. However, this high praise is almost universally tempered by severe criticism of ownership costs and reliability concerns beyond the initial warranty period.
Best version to buy
Insufficient owner data available to declare a single "best" version. Feedback is split by priorities: the GLS 450 is noted for being the entry point with a sacrifice in power.
Known issues
- Exorbitant maintenance and repair costs: very frequent reports of routine dealer service visits costing $1,800-$2,200, with major repairs like air suspension or differential failure costing $5,000-$30,000. Frequency: very frequent.
- Air suspension failures: described as a "common" point of failure leading to very expensive repairs ($2,250 minimum, often $5,000+). Frequency: very frequent.
- Premature tire and brake wear: rear tires last 15,000-20,000 miles; brake pads require frequent replacement; cited as an almost annual expense. Frequency: very frequent.
The verdict
The Lexus GX is the better choice for most buyers.
It has stronger reliability sentiment in owner reports than the Mercedes-Benz GLS, based on the data above. If the specific known issues on the Lexus GX are a dealbreaker, the Mercedes-Benz GLS 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 Lexus GX or the Mercedes-Benz GLS?
Owner reports lean more positive on reliability for the Lexus GX than the Mercedes-Benz GLS. See the known issues comparison above for the specific concerns owners report on each.
Which is better for families, the Lexus GX or the Mercedes-Benz GLS?
The Lexus GX seats more passengers than the Mercedes-Benz GLS on its catalogued best-equipped version. Body type also differs: the Lexus GX is classed as a SUV, the Mercedes-Benz GLS as a SUV.
Which has better fuel economy, the Lexus GX or the Mercedes-Benz GLS?
The EPA rates the 2026 Lexus GX at 17 mpg combined and the 2027 Mercedes-Benz GLS at 21 mpg, depending on the version.
Which is cheaper to maintain, the Lexus GX or the Mercedes-Benz GLS?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Mercedes-Benz GLS than the Lexus GX. See the known issues comparison above.