A recent survey conducted by The Motor Ombudsman, polling vehicle repairers across the UK, has identified the five most frequently delayed areas of car maintenance by customers. The findings underscore a trend of motorists postponing essential repairs, likely driven by increasing financial pressures on households. Over half of the surveyed garages (56%) reported observing this cost-saving measure among their customers in the past year.
According to the study, the replacement of the engine timing belt is the most overlooked aspect of vehicle maintenance, cited by 79% of respondents. While the average cost of a timing belt replacement is around £600, neglecting this manufacturer-recommended procedure (typically every 60,000 to 100,000 miles) can lead to significant engine damage or complete failure, potentially incurring repair bills averaging £5,400 – nine times the original cost of the belt replacement.
The second most common area of deferred maintenance, reported by 72% of participants, is forgoing engine oil and filter changes when required between annual services, often due to higher-than-average mileage. The average cost of an oil and filter change is approximately £150. Driving with oil beyond its recommended lifespan can cause it to thicken and accumulate contaminants, leading to reduced engine efficiency, overheating, or even engine seizure, rendering the vehicle unusable.
Furthermore, 58% of surveyed repairers indicated that tyre replacements are frequently delayed as a cost-cutting measure. However, this can have serious safety and financial implications. Driving on tyres worn below the legal minimum tread depth of 1.6mm compromises vehicle performance and grip. Additionally, owners risk fines of up to £2,500 and three penalty points per tyre, potentially escalating to £10,000 and a driving ban if all four tyres are below the legal limit. This contrasts sharply with the average replacement cost of £94 per tyre, or under £400 for a full set.
Leaving oil leaks unresolved was the fourth most common delayed maintenance item, reported by 49% of garages. Rectifying an oil leak costs around £355 on average. Neglecting this issue can lead to inadequate engine lubrication, causing component damage and eventual engine failure, potentially requiring a complete engine replacement. In extreme cases, leaking oil coming into contact with a hot exhaust can also pose a fire risk.
Rounding out the top five most delayed maintenance areas, cited by 39% of repairers, is the replacement of worn brake pads. The average cost for a set of two brake pads per wheel is £266. Ignoring worn brake pads, often indicated by squealing or grinding noises, can not only lead to the need for more extensive and costly repairs to the braking system, such as discs and calipers, but also significantly increase stopping distances, particularly in adverse weather conditions, posing a safety hazard.

Bill Fennell, Chief Ombudsman and Managing Director of The Motor Ombudsman, emphasised the potential for significant long-term damage and increased costs when essential vehicle maintenance is delayed. He also highlighted the safety and legal risks associated with neglecting necessary repairs.
Rebecca Pullan, Managing Director at The Motor Ombudsman-accredited Carmaster Garage, advised motorists to address potential issues promptly to avoid more expensive repairs later.
In light of the survey findings, The Motor Ombudsman recommends car owners take proactive steps, including regular basic checks, contacting accredited repairers for warning lights or unusual noises, seeking free vehicle health checks, considering service plans, and exploring extended warranties.
For a list of businesses accredited to The Motor Ombudsman’s Service and Repair Code, please click here.