The independent garage’s hidden revenue problem is not mechanical — it’s administrative. MOT reminders that never got sent. Review requests that felt too awkward to ask. Customer messages that sat unanswered while you were under a car. A “we charged you too much” review that sat on Google for six months because nobody replied.

Each of these is a revenue leak. ChatGPT on your phone seals them — five minutes between jobs, for free, with no technical knowledge required.

Prompt 1 — The MOT Reminder Text

A customer has their MOT done with you. Their next one is due in twelve months. Do you remind them? Most independent garages don’t — not because they don’t want to, but because sending individual reminder texts for every customer feels like admin nobody has time for. The customer books with whoever comes up first on Google when they remember in eleven months. You lose the repeat business.

This prompt writes the reminder text. All you need to do is send it four weeks before their MOT is due.

"Write a short, friendly text message or WhatsApp to send to a customer reminding them their MOT is coming up. Customer name: [their name]. Their vehicle: [make and model if you know it — or leave blank]. MOT due: approximately [month / in X weeks]. The message should: remind them in a warm, non-pushy way, mention that we’re happy to book them in, and give a simple way to respond — either reply to this message or call us. Under 60 words. Friendly and local — from a garage that remembers who they are, not an automated system."

Prompt 2 — The Job Completion Summary

A customer drops their car off and picks it up hours later. You tell them verbally what was done and what was found. Three days later they’ve forgotten the details and start wondering what they paid for. A written summary sent after every job — what was done, what we found, what to watch for next time — builds trust and dramatically reduces “what did you actually do to it?” calls.

"Write a short, clear text or WhatsApp message to send to a customer after completing work on their vehicle. The work completed was: [list what was done — e.g. ‘full service, oil and filter change, checked and topped up all fluids, replaced front wiper blades’]. Any advisory items noted: [e.g. ‘rear tyres getting low — worth watching over the next month or so’ / ‘all good, no advisories’]. The message should: summarise clearly what was done, mention any advisories plainly without alarming them, and thank them for bringing the car to us. Under 80 words. Professional but friendly — like a mechanic who respects their customer’s intelligence."

Prompt 3 — The Google Review Request

Reviews are the single biggest factor in whether someone calls you or the garage down the road when their engine warning light comes on at 9pm. Most satisfied customers would leave a review if you asked — but the ask rarely happens because it feels pushy, or because there’s no time to write a different message for each customer. This prompt writes a natural, non-pushy review request in under 60 seconds.

"Write a short, warm text or WhatsApp I can send to a customer after completing their MOT or service, asking for a Google review. The job was: [briefly describe — e.g. ‘full MOT pass, no advisories’ / ‘MOT plus brake pads replaced’]. The message should: check they’re happy with the work, explain that a Google review makes a genuine difference to a small independent garage trying to compete with the chains, make the ask feel natural and unpressured, and thank them. Under 55 words. Sounds like a real person — not an automated review platform. I’ll add my Google review link at the end."

Prompt 4 — The “You Overcharged Me” Review Reply

It happens to every garage. A customer leaves a review claiming the price was unfair, the work wasn’t necessary, or they were ripped off. It’s visible to every potential customer who searches for you. Getting defensive or ignoring it is equally damaging. A calm, professional, factual reply demonstrates integrity to every future customer who reads it — even if the reviewer doesn’t change their mind.

"Help me write a professional reply to this Google review: [paste the review]. From my side: [briefly explain — e.g. ‘the parts cost is industry standard and we showed the customer the price list beforehand’ / ‘the additional work was only done after verbal authorisation’ / ‘we acknowledge the price was higher than expected and have since updated how we communicate estimates’]. Write a reply that: (1) thanks them for raising it, (2) states our position calmly and factually, (3) invites them to discuss directly with me personally, (4) demonstrates to other readers that we operate transparently and take concerns seriously. Under 100 words. Composed, professional, never defensive."

Prompt 5 — The Booking Availability Post

Most independent garages have no online presence beyond a Google Business Profile. The garages that are growing bookings in 2026 are the ones posting consistent, simple content on Facebook — “we have slots available this week” posts that reach their local audience at exactly the right moment. This prompt writes that post in under 60 seconds and works for every week, every season.

"Write a short, friendly Facebook post announcing that we have MOT or service slots available this week at my garage. Details: Slots available: [e.g. ‘Tuesday afternoon and Friday morning’ / ‘we’ve had a cancellation this Wednesday’]. Any current offer: [e.g. ‘MOT from £45 this week only’ / ‘no special offer this week’]. How to book: [call us on / message us / book online at]. The post should: feel like it’s from a real local garage, not a corporate booking platform, create a mild sense of availability rather than desperation, and end with a simple call to action. Under 60 words."

Why These Prompts Work — The CRAFT Method

Every prompt above uses the CRAFT Method — the five-part framework that transforms ChatGPT from a generic writing tool into something that sounds like your garage. Vague instructions produce vague output. Specific context produces something you’d actually send.

Also see: ChatGPT for Plumbers — the same approach applied to the plumbing trades, with 5 prompts for quotes, running late messages and review requests.

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