How long does a Lexus IS 350 last?

With proper maintenance, the Lexus IS 350 can last for many years and reach high mileage—typically around 200,000 miles or more, with a meaningful number of examples eclipsing 250,000 miles and some even pushing toward 300,000 miles.

The exact lifespan depends on how well the car has been cared for, how it has been driven, and the environment in which it operates. The following sections outline the factors, real-world expectations, and maintenance practices that influence longevity.

What affects its longevity

Several factors determine how long a given IS 350 will run before major repairs become necessary. The most influential ones include:

• Maintenance history and service quality


• Driving style and usage patterns


• Climate, road conditions, and exposure to salt


• Model year and drivetrain configuration


• Past accidents or major repairs

In short, longevity is driven mainly by how well the car is cared for and how it is driven over time.

Typical lifespan and mileage you can expect

Across generations, a well-kept IS 350 can routinely reach 200,000 miles. A notable portion of owners report 250,000 miles or more, and a few push toward 300,000 miles or higher with meticulous maintenance and careful driving. While individual results vary, this range reflects the model's reputation for reliability at the higher end of the luxury-sedan segment.

Real-world mileage patterns

In practice, the two biggest drivers of mileage are maintenance quality and usage. Regular service, timely repairs, and avoiding neglectful practices contribute to longer life. Cars with inconsistent service records or exposure to harsh climates tend to show wear sooner.

Maintenance practices that maximize life

Proper maintenance is the strongest predictor of a long-lived IS 350. The following routine-care steps are commonly recommended by Lexus technicians and reputable service guides:

1. Follow the manufacturer's service schedule for oil changes using synthetic oil, typically every 5,000–7,500 miles (or per manual) to protect the V6's performance and longevity.


2. Keep the cooling system in good shape: replace coolant on schedule and monitor for leaks, as overheating can accelerate engine wear.


3. Pay attention to the timing-chain/valvetrain: the 2GR-FSE uses a timing chain; have it inspected if you notice unusual tapping or poor performance, and service components like tensioners when indicated.


4. Adhere to recommended transmission fluid maintenance and changes; a clean, properly serviced tranny reduces wear and helps preserve shifts.


5. Replace spark plugs and ignition components at the intervals specified for the engine to avoid misfires and irregular combustion, particularly as miles accumulate.


6. Replace brake fluid roughly every 2 years to prevent internal corrosion of braking system components.


7. Inspect belts, hoses, and the electrical system; replace worn components before they fail unexpectedly.


8. Maintain tires, rotation, alignment, and balance; good alignments reduce uneven tire wear and drivetrain stress.


9. Keep the battery and charging system healthy; replace aged batteries to avoid electrical glitches that mimic other issues.

In short, steady, proactive maintenance extends the life of the IS 350 far more than heavy-handed driving or reactive fixes.

Warning signs as the car ages

As an IS 350 accumulates miles, watch for indicators that life may be narrowing. Common signals include:

• Unusual engine noises, such as ticking or knocking, particularly from the valvetrain area


• Rough idle, misfires, or reduced fuel efficiency


• Transmission hesitation, slipping, or hard/shaky shifts


• Unexpected oil consumption or visible leaks


• Overheating or cooling-system leaks, and warning lights


• Excessive rust on body panels or undercarriage (in climates with heavy road salt)

Early detection and timely repairs can prevent minor issues from becoming major, preserving the car's remaining life.

Reliability, ownership costs, and value

Lexus' reputation for reliability helps IS 350 owners enjoy lower repair costs relative to many other luxury brands, especially when maintenance is performed at sensible intervals and by qualified technicians. However, ownership costs—insurance, maintenance, and parts for a luxury sedan—remain higher than mainstream vehicles. Routine maintenance is a better investment than reactive fixes later on, and a well-documented service history can improve resale value.

Overall, many owners report that a well-kept IS 350 remains appealing to buyers well into its second decade, thanks to Toyota-Lexus engineering and a strong reliability pedigree.

Summary

With diligent upkeep, the Lexus IS 350 can deliver long life and substantial mileage. Expect around 200,000 miles or more, with many cars reaching 250,000 miles and a subset surpassing 300,000 miles. The key to longevity is consistent maintenance, sensible driving, and timely repairs, underscored by a solid maintenance record and attention to the vehicle's aging components. Prospective buyers should seek a thorough pre-purchase inspection and a complete maintenance history to gauge how long a specific IS 350 is likely to last.

How reliable is the Lexus IS 350 engine?

The Lexus IS350 Reliability Rating is 4.0 out of 5.0, which ranks it 9th out of 31 for luxury midsize cars. The average annual repair cost is $543 which means it has lower than average ownership costs. While repairs are more common, these issues are less likely to be severe than with other cars.

How many miles can you get out of a Lexus 350?

You can expect a typical Lexus RX to last around 200,000-250,000 miles, with the high mileage point resting around 200,000 miles and good mileage sitting at 150,000 or more.

How many miles is too many for a Lexus IS?

In general, cars from this luxury brand can easily last 250,000 to 300,000 miles. While cars from other brands can last for around 150,000 miles, a Lexus can double that estimation and allows drivers to push the absolute limit of the vehicle's longevity before a replacement is necessary.

Is a Lexus IS 350 expensive to maintain?

No, a Lexus IS350 is not considered expensive to maintain compared to other luxury sedans, and is even cheaper than the average for its class. It has lower-than-average annual repair costs, a lower probability of needing a major repair, and its reliability ratings are high. However, maintenance can be more expensive than for a non-luxury vehicle due to higher part costs. 
Maintenance costs and reliability

• Lower than average: The Lexus IS350 is cheaper to maintain than the average luxury sedan, with an estimated $5,891 for maintenance and repairs over the first 10 years. 
• Higher than average frequency: You may need to visit the shop slightly more often for minor issues, but severe issues are less likely. 
• Reliability: The IS350 has a high reliability rating, ranking well among luxury midsize cars. 

Why it's not considered "expensive"

• Lower repair costs: Its average annual repair cost is lower than the luxury car average. 
• Fewer major repairs: The chance of a major repair is lower than for similar vehicles in its segment. 
• Comparison to other brands: Lexus models, including the IS350, are generally more affordable to maintain than brands like BMW. 

Factors that could increase cost

• Part costs: Parts for any luxury vehicle can be more expensive than those for non-luxury cars.
• Dealer vs. independent mechanic: Going to a dealership for service will likely be more expensive than an independent mechanic due to higher labor rates and the use of factory parts.