New research from Autotrader has revealed that two-thirds of UK drivers incorrectly identify car problems based on the sounds their vehicles make, potentially leading to unnecessary repair costs of up to £400.
The study, which tested 2,000 UK motorists on their ability to recognise common mechanical faults through sound recordings, found that 66 per cent misdiagnosed issues ranging from worn brake pads to seized engines.
Despite 53 per cent of drivers expressing confidence in their diagnostic abilities, the research exposed a significant gap between perceived expertise and actual knowledge.
The findings suggest that misidentifying these warning sounds not only risks driver safety but also results in substantial financial consequences when minor problems escalate into major repairs.
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|Drivers could find themselves paying an average of £400 to repair their vehicles
The sound recognition survey revealed that drivers struggled most with identifying low power steering fluid levels and wheel bearing damage, both potentially serious issues that could lead to steering failure if left unaddressed.
Even more concerning, 72 per cent of participants failed to recognise the distinctive sound of a seized engine, often mistaking it for a worn wheel bearing.
Age played a crucial role, with 74 per cent of drivers aged 25-35 claiming high diagnostic confidence compared to just 37 per cent of those over 55.
The financial impact of ignoring unusual car noises proved substantial, with more than a third of drivers admitting they had ignored mechanical issues that later developed into more serious problems.
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Motorists must renew their MOT test every year
On average, these delays added £400 to repair bills, with one in five motorists reporting expenses exceeding £700 for problems they initially chose to ignore.
When suspicious sounds emerged, nearly half of UK drivers (47 per cent) said they would seek professional help immediately.
However, 36 per cent admitted they would wait up to a month before taking action, allowing minor issues time to worsen.
Erin Baker, Editorial Director at Auto Trader, said: "This study shows that even the most confident drivers can be stumped by a strange noise under the hood.
"Misdiagnosing car issues isn't just inconvenient; it can be costly and even dangerous.
"The earlier you address an odd noise in your car, the better. Not only will it keep your car in top condition when it comes to holding its resale value, but it will also save you money to diagnose and fix it sooner rather than being faced with a costly surprise later down the line."
The research also revealed distinct patterns among different car brands, with Mercedes-Benz owners responding most quickly to problems.
On the other end of the spectrum, Audi drivers proved most relaxed, with 29 per cent willing to wait more than a week before addressing issues.
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Exhaust leaks are one of the most commonly misdiagnosed car issue
- Low power steering fluid - 82 per cent
- Wheel bearing issues - 81 per cent
- Seized engine - 72 per cent
- Loose or worn-out belt - 70 per cent
- CV axle issues - 70 per cent
- Bad suspension - 65 per cent
- Cooling system leak - 61 per cent
- Loose exhaust shield - 60 per cent
- Exhaust leak - 55 per cent
- Worn brake pads - 48 per cent