Lexus NX MOT failure rates: what fails, what to fix
What the DVSA MOT data shows for the Lexus NX. The most common failure categories and what each one typically costs to put right.

TL;DR
The Lexus NX commonly faces MOT failures related to brakes, suspension, lighting, and emissions, with failure rates increasing significantly after five years. Regular maintenance and quick fixes can help avoid costly repairs, while structural issues may require more extensive work.
Common MOT Failure Categories
The most frequent MOT failure categories for the Lexus NX include brakes, suspension, lighting, and emissions. Braking issues often relate to worn pads or discs, which can be easily replaced. Suspension failures usually involve components like shock absorbers or springs, which can be more costly to fix. Owners have noted that brake problems can arise as early as three years into ownership, particularly if the vehicle is used for short trips where braking is frequent.
Age-by-Age Fail Rate Trajectory
As the Lexus NX ages, its MOT fail rate tends to increase. Vehicles around 5 years old see a significant uptick in failures, often due to wear and tear on components. By the time they reach 10 years, many owners report multiple failures during a single MOT test. This pattern is common across many vehicles, but the Lexus NX’s fail rate has been observed to rise sharply due to the complexity of its electronic systems as they age.
Quick Fixes vs Structural Issues
Some common issues, like faulty bulbs or worn brake pads, can be resolved quickly and cheaply. These quick fixes typically cost under £100. In contrast, structural issues like suspension problems can be more complex and expensive, with costs ranging from £200 to £800 depending on the specific repair needed. Owners have shared that while minor fixes can be straightforward, they often recommend budgeting for potential larger repairs as the vehicle ages.
Cost Ranges for Typical Failures
Brakes are often the first point of failure, with costs for pads and discs averaging around £150 to £300. Suspension repairs can vary widely, while lighting issues usually involve minimal costs for bulb replacements. Emissions failures may require more extensive diagnostics and repairs, potentially costing upwards of £300. Some owners have reported spending significantly more if the emissions system requires replacement parts, which can escalate the total repair bill.
Prevention and Maintenance
Regular maintenance is key to preventing MOT failures. Simple checks on brakes, lights, and suspension components can catch issues before they become serious. Keeping up with service schedules will also help maintain the vehicle’s overall condition. Owners often emphasise the importance of using genuine parts for replacements, as this can lead to better long-term reliability and performance.
What people are asking
Is the Lexus NX a reliable car?
Yes, the Lexus NX is generally regarded as a reliable vehicle. Many owners report minimal issues with their cars, particularly if they adhere to regular maintenance schedules. The brand’s reputation for reliability is well-established, making it a popular choice among drivers.
What year to stay away from Lexus NX?
Some buyers have flagged that certain model years, particularly the earlier versions like the 2015 and 2016 models, may have more reported issues, such as excessive oil consumption and transmission problems. It is advisable to research specific vehicle histories and owner reviews when considering these years.
Is the Lexus NX high maintenance?
While the Lexus NX is not considered excessively high maintenance, some owners have noted that parts and servicing can be pricier compared to non-luxury brands. Regular maintenance is essential, but many find that the reliability of the vehicle offsets these costs over time.
Which year is Lexus NX most reliable?
The 2021 and later models of the Lexus NX are often highlighted as the most reliable, benefiting from improvements in technology and design. Owners have reported fewer issues with these newer models, making them a safer bet for potential buyers.
What owners say
Owners on r/LexusNX often praise the Lexus NX for its overall reliability, noting that many have experienced few issues even after several years of ownership. A common theme is the satisfaction with the vehicle’s performance and comfort, especially during long drives. However, some owners have expressed concerns about the cost of repairs, particularly for suspension and electronic components, which can be more expensive than expected.
When discussing common faults, many users have pointed out that while the NX is generally reliable, issues such as excessive oil consumption and transmission hesitations have been reported, particularly in models from 2015 to 2018. This has led some buyers in UK communities to advise caution when considering these specific years.
Value is another frequent topic among owners. Many believe the Lexus NX holds its value well compared to competitors in the luxury crossover segment. However, some have mentioned that the resale value can be affected by the reputation of certain model years, which is something potential buyers should consider.
Finally, what to avoid is a common discussion point. Owners recommend steering clear of vehicles with a history of transmission issues or those that have not been well maintained. They suggest checking service records thoroughly and considering a pre-purchase inspection to avoid potential pitfalls.
Frequently asked questions
What are the most common MOT failures for the Lexus NX?
Brakes, suspension, lighting, and emissions are the most frequent failure categories.
How does the fail rate change with age?
Typically, the fail rate increases as the vehicle ages, particularly from 5 years onwards.
What are some quick fixes for common failures?
Replacing bulbs and brake pads are common quick fixes that can be done relatively cheaply.
What are the costs associated with suspension repairs?
Suspension repairs can range from £200 to £800 depending on the specific issue.
How can I prevent MOT failures?
Regular maintenance and checks can help prevent common issues that lead to MOT failures.
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Sources
DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.