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How Do We Remind Customers Their Car Is Due a Service When We Only Know Last Year's Mileage?

Garages send service reminders on a fixed date and miss high-mileage drivers. We build reminders that estimate mileage and follow each maker's schedule.

Updated 3 min readBy SpiderHunts Technologies

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Quick answer — TL;DR

Service reminders based only on the date of the last visit miss the drivers doing high mileage and pester the ones doing very little. We estimate each car's current mileage from its visit history, apply the service interval you use for that vehicle, and send reminders timed to when each car is likely to be due, with a booking link.

A reminder list nobody trusts

Your garage management system can send service reminders, and you switched them on a while ago. Every car gets a text eleven months after its last service. The rep who does forty miles a day was due months before the text arrived and went to a fast-fit chain. The retired customer who drives to the shops gets a reminder at a few thousand miles and wonders why.

So the reminders get switched off, or ignored, and the list of past customers slowly shrinks. You know from the counter that many of them still like you. They just did not think about the service until a warning light came on.

Date alone is the wrong trigger

Most servicing schedules depend on time or mileage, whichever comes first, and some cars have variable intervals shown on the dash. A reminder that only counts months treats every driver as average, and very few are.

You already hold the data to do better. Every visit records a date and a mileage, and most customers have been in more than once. From that you can estimate how many miles a year each car does and when it will reach its next interval. The data sits unused because the reminder feature was built around a date field.

What blunt reminders cost

Driver typeWhat a date-only reminder does
High mileageArrives after the service is overdue, often after they went elsewhere
Very low mileageArrives too early and gets ignored
Variable interval carIgnores the dashboard, so the customer trusts the car instead
Customer with two carsSends two unconnected reminders at odd times
Car sold since last visitGoes to someone who no longer owns it

The result is fewer returning customers than your history would suggest, and a quieter diary in the months when you most need it.

How we time reminders to each car

  1. We read visit history from your garage management system: registration, dates, mileage and the work done.
  2. For each car, we estimate annual mileage from the visits, and fall back to the date where there is only one visit.
  3. You tell us the intervals you use, by make, model or service type. We do not set them for you.
  4. The system works out when each car is likely to reach its next interval by time or mileage, whichever comes first.
  5. A reminder goes out a little before that point, by text or email, with a link to book or a number to ring. Customers with more than one car get one message covering both.
  6. Replies such as "sold the car" or "had it done elsewhere" update the record, so the next reminder is correct or stops.

We also respect the permissions customers gave you. If someone did not agree to marketing messages, the system follows whatever your own policy and adviser say about service reminders for them.

What changes in the diary

Reminders arrive when a service is actually close, so they get acted on. The high-mileage driver hears from you in time. The low-mileage customer is contacted around the anniversary instead of too early. Records of sold cars stop wasting messages.

You also get a simple forecast: how many cars are likely to become due in each of the next few months, so you can plan staffing or push other work in quiet weeks.

  • Reminders timed by estimated mileage and date
  • Intervals set by you, per make or service type
  • One message for customers with several cars
  • A view of how many services fall due each month

Are your reminders missing the mark?

  • Every customer gets a reminder at the same point after their last visit.
  • High-mileage customers go elsewhere before your reminder arrives.
  • You switched reminders off because they felt pointless.
  • Customers with two cars get muddled messages.
  • You cannot forecast how busy servicing will be next month.

FAQ

Frequently asked questions

The questions readers ask us after this guide.

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Do you decide the service intervals?

No. You tell us the intervals you follow for each make, model or service type, and the reminders use them.

What if a customer has only been in once?

Then the reminder falls back to the date of that visit, and becomes more accurate as more visits are recorded.

Can it include MOT reminders too?

It can combine a service reminder with an MOT due date if you also test, so a customer gets one message rather than two.

Do we need a new booking system?

No. The reminder links to whatever booking method you use, whether that is an online form, a phone number or your existing booking tool.

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