A staggering number of dealer customer databases in the UK automotive industry are riddled with inaccuracies, costing dealerships both in terms of revenue and customer satisfaction. According to a comprehensive analysis by data experts Auto Data Solutions (ADS), more than half of all customer records may be incorrect, leaving dealerships exposed to significant inefficiencies in their communications and missed business opportunities.
ADS’ recent findings paint a sobering picture of the state of customer data management in automotive retail. In one typical case, ADS discovered that over a third of MOT details in a dealer’s database were wrong, with the total number of flawed records exceeding 50%. Such discrepancies highlight a persistent issue: many dealerships have neglected to update basic customer details, resulting in communications that are often sent to the wrong person, at the wrong time, or to an outdated address. This not only wastes valuable resources but also undermines potential workshop and sales revenue.
More alarmingly, ADS identified that some communications were being sent to deceased customers, a disheartening error that reflects the widespread neglect of database accuracy.

Real-Time Data Management: The Solution to a Widespread Problem
ADS’ analysis spanned several major dealer groups, using a sophisticated real-time data checking system to track key stages in a vehicle’s ownership lifecycle. The system flags essential updates, such as changes in vehicle registration, owner addresses, and MOT due dates. It can also identify vehicles that have been written off, scrapped, or stolen, offering a much-needed solution for dealerships struggling with outdated or incorrect information.
In one database of 424,000 customer records, ADS discovered that 74.1% were inaccurate, with 112,550 customers no longer owning the car that was originally supplied. Worse still, over 61% of these records had incorrect MOT dates, a critical oversight that directly impacts a dealership’s ability to generate workshop revenue.
Jon Sheard, Operations Director of ADS, believes that the UK automotive sector has fallen behind other industries, such as food retail, in terms of data management. “There’s a vast amount of low-hanging fruit available simply by knowing where your customers live, whether they still own the car, and when its MOT is due,” said Sheard.
The Revenue Impact: Why Data Cleansing Matters
For dealerships, the consequences of these inaccuracies go far beyond simple administrative issues. According to ADS, failing to cleanse customer databases in a timely manner leads to countless missed opportunities for revenue generation. Jon Sheard points out that dealers who take the necessary steps to update their databases often see significant financial returns.
In fact, ADS estimates that correcting just 1,000 MOT discrepancies could bring in an additional £40,000 in workshop revenue, based on a 30% booking rate and a 35% profit margin. This revenue boost, Sheard argues, more than offsets the cost of investing in real-time data cleansing technology.
Yet many dealerships are reluctant to tackle this issue head-on. Sheard explains that some dealers are simply unaware of how poor their records are, while others are deterred by the perceived complexity of re-importing an accurate database into their Dealer Management System (DMS). Some mistakenly believe they can manage the process internally without expert assistance.
However, ADS emphasizes that real-time data management offers a solution to these problems. By keeping track of essential customer information as it changes, dealerships can streamline their communications, increase customer engagement, and ultimately boost their bottom line.
Missed Opportunities: The Cost of Neglecting Data Accuracy
The analysis by ADS suggests that by allowing their databases to become outdated, dealerships are routinely squandering opportunities to strengthen customer relationships and increase sales. As Sheard notes, “Research consistently demonstrates that if the right customers are contacted at the right time, a significant proportion of them will book service work or even discuss upgrading their car.”
Unfortunately, without accurate data, those opportunities are lost. Communications sent to incorrect addresses or customers who have moved on to other dealerships do more than waste time—they erode trust and limit future business growth.
A Call to Action for Dealerships
ADS’ findings serve as a wake-up call for the UK automotive industry. The cost of failing to keep track of customer records is not just financial—it’s reputational. In an age where customer experience is paramount, dealerships cannot afford to neglect data accuracy.
By investing in real-time data solutions, dealers can ensure they are engaging with the right customers at the right time, preventing the loss of valuable business and securing long-term customer loyalty.
In the end, timely data cleansing is not just an operational necessity—it’s a strategic advantage. The dealerships that recognise this will be the ones that thrive in an increasingly competitive market.















