Are Lexus GS300s reliable?

The short answer: Yes, Lexus GS300s are generally reliable for a used luxury sedan from their era, especially when they have solid maintenance history.

More detail: The GS300 lineup was produced from the late 1990s through the early 2000s, built on Toyota's reliability principles. With regular service, robust engines and transmissions can deliver many miles; however, age-related wear on cooling systems, suspension, and electrical components is common in higher-mileage examples. Prospective buyers and owners typically rate reliability highly relative to other luxury sedans of the period, provided maintenance records are complete.

Reliability overview

Core reliability factors

The following factors most influence how well a GS300 runs today. The items below are the ones most commonly cited by owners and reviewers when assessing long-term dependability.

• Engine durability: The GS300 uses reliable engine platforms that respond well to regular oil changes, cooling system maintenance, and timely replacement of wear items.


• Transmission longevity: Automatic transmissions generally perform well with proper maintenance; failures are more common in high-mileage units without consistent service.


• Maintenance history: A clean service record, including cooling system work and routine wear-item replacements, is strongly correlated with reliability.


• Parts availability: After two decades, parts and skilled Lexus technicians remain widely available, helping keep repairs practical for most owners.


• Age-related wear: Bushings, suspension components, hoses, trims, and electrical connectors can deteriorate with time and mileage, affecting perceived reliability.

Conclusion: With attentive maintenance, a GS300 from the era can be a dependable daily driver and a reasonable long-term ownership choice among its peers.

Buying and maintenance considerations

Pre-purchase checklist

Before buying a used GS300, use this checklist to gauge current condition and estimate future maintenance needs. The list below is designed to focus on reliability and ongoing costs.

• Documentation: Gather maintenance records, receipts, and any records of cooling system or transmission work.


• Engine health: Check for leaks, oil consumption, unusual noises, and perform a compression test if possible.


• Transmission behavior: Confirm smooth shifting with no slipping or harsh engagement; check fluid condition and level.


• Cooling system: Inspect hoses, radiator, water pump, and thermostat for leaks or overheating history.


• Suspension and steering: Look for worn bushings, ball joints, control arms, and uneven tire wear indicating alignment or component wear.


• Braking and tires: Inspect brake pads/rotors, ABS sensors, and tire tread condition; ensure braking performance is strong and consistent.


• Electrical systems: Test power windows, climate control, and lighting; note any warning lights and address sensor or module issues.

Conclusion: A thorough pre-purchase evaluation helps prevent surprise repairs and makes budgeting for maintenance more accurate for a GS300 owner.

Summary

Overall, Lexus GS300s carry a reputation for reliability that has endured among owners of late-90s and early-2000s luxury cars. When well maintained, these cars can deliver dependable service and a satisfying ownership experience, with careful attention to cooling systems, transmission health, and suspension components as they age.

Is the GS300 expensive to maintain?

The estimated cost to maintain and repair a Lexus GS300 ranges from $105 to $3599, with an average of $416.

How long will a 1999 Lexus GS300 last?

A well-maintained GS300 can easily exceed 300,000 miles. The only components you should think about replacing on the engine, if you haven't already, are the water pump and timing belt. Additionally, if you haven't done so yet, consider replacing the coolant hoses.

Is the Lexus GS 300 reliable?

The Lexus GS300 has a reputation for strong engine reliability, especially with its durable 2JZ-GE engine, but can have issues with other components as the vehicle ages. Common concerns include maintenance-related issues like carbon buildup, potential for oil burning if neglected, and problems with other systems such as the alternator, power window actuators, Mark Levinson amplifier, and suspension components like the control arms and bushings. 
You can watch this video for a review of the 2006 Lexus GS300 and a discussion of its reliability: 1mPOV NelsonYouTube · Dec 23, 2021
Engine and drivetrain 

• 2JZ-GE engine: The non-turbo 2JZ-GE engine is widely considered very reliable and durable. 
• Carbon buildup: Some models can experience carbon buildup, which can lead to oil consumption issues. This is often addressed with a maintenance campaign in some regions and can be mitigated with regular maintenance. 
• Oil burning: Lack of maintenance can lead to oil burning. Consistent oil changes and proper upkeep can prevent this. 

Potential problem areas

• Alternator: Some owners have reported alternator failures, sometimes requiring a replacement or even a modified regulator. 
• Mark Levinson amplifier: In some models, a faulty or missing exhaust vent flap can allow water in and damage the Mark Levinson amplifier, which can be expensive to replace. 
• Power door lock actuators: These may fail, but some owners report they can be a DIY fix. 
• Sunroof: Although rare, there are reports of exploding sunroofs, possibly due to the same pressure relief issues that affect the amplifier. 

This video discusses common reliability issues with the 4th generation Lexus GS 350: 55sDiscerning CarsYouTube · Jan 10, 2024
Suspension

• Wear and tear: Suspension components like control arms, bushings, and brakes can wear out, especially with performance-oriented driving.
• Clunking sounds: Owners have reported clunking noises over potholes, which can indicate worn-out suspension parts. 

General maintenance

• Regular maintenance is crucial: As with any vehicle, consistent and timely maintenance is key to longevity. Keep up with oil changes and other recommended services to avoid potential issues. 
• Check for issues: Before purchasing a used GS300, have a pre-purchase inspection (PPI) to check for any existing issues with the engine, alternator, or suspension. 
• Review the vehicle's history: Look for a vehicle that has been well-maintained, as this is a strong indicator of its overall condition and reliability. 

Is the Lexus 3GR reliable?

Low Maintenance & Reliability – Lexus engines, including the 3GR-FE, are renowned for their durability. With a simple yet robust design, the 3GR-FE engine requires minimal maintenance, ensuring longevity and a hassle-free ownership experience.