Common problems

Lexus IS common problems and reliability issues

Honest rundown of the most common Lexus IS faults, what to watch for, and how to keep one running well.

Updated 23rd June 2026 DVSA data: Across 14,179 recorded MOT tests, 10.4% failed.

Lexus IS
Image via Wikipedia, CC-licensed.

The Lexus IS is generally regarded as a reliable vehicle, but like any car, it has its share of common problems. Issues can arise in various systems, including the engine, transmission, suspension, and electrical components.

Engine Issues

The Lexus IS is known for its robust engine performance; however, some owners have reported issues with oil consumption, particularly in the earlier models. This can lead to a need for more frequent oil top-ups and, in severe cases, engine damage if not addressed promptly.

Another concern is the timing chain tensioner, which can wear out over time. A failing tensioner may result in a rattling noise from the engine, especially during cold starts. Regular maintenance and timely inspections can help mitigate these risks.

Transmission Problems

Transmission issues in the Lexus IS are relatively rare, but some drivers have experienced problems with the automatic gearbox, particularly in older models. Symptoms may include harsh shifting or slipping gears, which can affect the overall driving experience.

In some cases, a software update may resolve these issues, while others might require a more in-depth inspection or even a transmission rebuild. Keeping an eye on transmission fluid levels and ensuring regular servicing can help prevent these problems from escalating.

Suspension Concerns

The suspension system in the Lexus IS is generally well-engineered, but wear and tear can lead to problems over time. Common issues include worn bushings and shock absorbers, which can result in a less comfortable ride and decreased handling performance.

Drivers may notice a knocking noise or a bouncy ride when these components begin to fail. Regular checks and replacing worn parts can help maintain the vehicle’s ride quality and safety.

Electrical System Faults

Electrical issues can occasionally arise in the Lexus IS, with some owners reporting problems with the infotainment system and dashboard displays. These faults can range from minor glitches to complete system failures, which can be frustrating for drivers.

In some cases, faulty wiring or blown fuses may be the culprit, while software updates can resolve certain issues. Ensuring that the vehicle’s electrical system is regularly checked can help identify and rectify problems before they become significant.

Brake System Problems

The braking system in the Lexus IS is generally reliable, but some models have been known to experience issues with brake pads and discs. Worn brake components can lead to decreased stopping power and increased noise during braking, which can compromise safety.

Regular inspections of the brake system are essential to ensure that all components are in good working order. Replacing worn pads and discs promptly can help maintain optimal braking performance and extend the life of the braking system.

Cooling System Failures

The cooling system is crucial for maintaining engine temperature, and some Lexus IS models have reported issues with the radiator and water pump. A failing water pump can lead to overheating, which can cause significant engine damage if not addressed quickly.

Drivers should keep an eye out for coolant leaks or warning lights on the dashboard, as these can indicate cooling system problems. Regular maintenance, including coolant changes and inspections, can help prevent overheating and ensure the longevity of the engine.

Lexus IS recall record

3 recalls have been issued for the Lexus IS, between 2014 and 2020.

  1. FUEL PUMP IMPELLER CAN CRACK AND CAUSE FUEL PUMP TO BECOME INOPRATIVE

    R/2020/060

    Issued 5 October 2020

    On affected vehicles the low pressure fuel pump located in the fuel tank could become inoperative.

    Remedy:Replace the fuel pump.

    Affects cars built Jul 2017 to Sept 2019

  2. RISK OF FIRE

    R/2016/080

    Issued 26 May 2016

    The fuel pressure sensor may not have correctly tightened during assembly. Over time this may affect the seal and allow fuel odour to escape. This could ignite in the presence of an ignition source.

    Remedy:On affected vehicles replace seal and tighten pressure sensor to specification.

    Affects cars built Jun 2005 to Sept 2007

  3. RISK OF FIRE

    R/2014/135

    Issued 24 November 2014

    The fuel pressure sensor gasket may degrade and allow fuel to leak into the engine compartment. In the presence of an ignition source the risk of fire is increased.

    Remedy:Recall the vehicles that are likely to be affected to repair the fuel pipe and replace the fuel pressure sensor gasket.

    Affects cars built Jul 2007 to Jun 2010

A recall applies to a build range, not to every car of this model. Check a registration to see whether one specific vehicle has an outstanding recall.

Lexus IS MOT record

From 14,179 recorded MOT tests, 10.4% failed.

MOT pass and failure rates by year of first registration
RegisteredTestsFailedMedian mileage
20205505.3%38,038 mi
20191,1507.6%52,448 mi
20181,4526.8%58,270 mi
20171,5268.4%64,389 mi
20161,94411.4%73,686 mi
20152,74411.1%82,590 mi
20142,97411.6%91,725 mi
20131,56714.0%93,776 mi

Most common reasons for failure

  1. Tyre tread depth not in accordance with the requirements37.9%
  2. A tyre seriously damaged30.4%
  3. A tyre cords visible or damaged12.4%
  4. Brake disc or drum excessively weakened, insecure or fractured10.2%
  5. a brake lining or pad worn below 1.5mm9.2%

Figures cover every Lexus IS tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Frequently asked questions

What are the most common problems with the Lexus IS?

Common issues with the Lexus IS include electrical faults, suspension wear, and problems with the automatic transmission. Regular maintenance can help mitigate these problems.

How reliable is the Lexus IS?

The Lexus IS is generally considered a reliable vehicle, with many owners reporting few issues over time. However, like any car, it can experience problems, especially as it ages.

Are there any known issues with the Lexus IS suspension?

Yes, some Lexus IS models may experience premature wear on suspension components, leading to a rough ride. It's advisable to have the suspension checked regularly, especially if you notice any unusual noises.

What should I look for when buying a used Lexus IS?

When buying a used Lexus IS, check for service history, any signs of electrical issues, and the condition of the suspension. A thorough vehicle inspection can help identify potential problems.

Do Lexus IS models have any common electrical issues?

Some Lexus IS owners have reported electrical problems, such as issues with the infotainment system or dashboard lights. Ensuring the vehicle has been properly maintained can help reduce the likelihood of these issues.

Is the Lexus IS expensive to maintain?

Maintenance costs for the Lexus IS can be higher than average due to its luxury status, but many owners find the reliability offsets these costs. Regular servicing is key to keeping expenses manageable.

What are the signs of transmission problems in a Lexus IS?

Signs of transmission issues in a Lexus IS may include slipping gears, delayed shifting, or unusual noises when changing gears. If you notice any of these symptoms, it's best to have the transmission checked by a professional.

How can I prevent common problems with my Lexus IS?

To prevent common problems, ensure regular servicing, keep an eye on fluid levels, and address any warning lights promptly. Staying proactive with maintenance can help extend the life of your vehicle.

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