Answers customers, sells and gives you your time back
WhatsApp chatbot for diesel repair shops in Brazil, with the CRM included
What CertuAI measured on WhatsApp at repair shops and auto parts stores
At the 4 repair shops and auto parts stores that answer with CertuAI's AI, 21.9% of the 7,828 customer messages arrived outside Monday to Friday, 8 am to 6 pm (July 30 to September 30, 2026). Half of the AI's replies went out within 15.2 seconds, and 9 in 10 within 23.9 seconds (1,949 replies). 27.8% of conversations started outside business hours, and the busiest hour for messages was 3 pm.
| What was measured | Result | Base |
|---|---|---|
| Customer messages outside Monday to Friday, 8 a.m. to 6 p.m. | 21,9% | 7,828 customer messages from 4 repair shops and auto parts stores |
| Weekend messages | 10% | 7,828 customer messages from 4 repair shops and auto parts stores |
| Conversations that start outside business hours | 27,8% | 1,211 conversations |
| Time until the AI replies (half of the replies) | within 15.2 seconds | 1,949 AI replies |
| Time until the AI replies (9 in 10 replies) | within 23.9 seconds | 1,949 AI replies |
| Hour of the day with the most customer messages | 15h | 7,828 customer messages from 4 repair shops and auto parts stores |
Source: CertuAI's customer service database, aggregate numbers only, no conversation read by a person; no imported history, no test contacts, and not including CertuAI's own sales service. July 30 to September 30, 2026, measured on Oct 9, 2026. Nikiti Auto Center, an auto center, already uses CertuAI to answer its customers on WhatsApp. Method and table by industry in the CertuAI WhatsApp Customer Service Index and at certu.com.br/dados.
Named customers, Jul 30 to Oct 10, 2026
| Customer | Customer messages | AI replies | Conversations handled | Outside business hours | AI replies in (median) | Days with messages |
|---|---|---|---|---|---|---|
| Nikiti Auto Center auto center | 4.912 | 3.548 | 900 | 19,5% | 14,4 s | 47 |
| JP Gás Água e Rações gas and water distributor | 42.832 | 23.351 | 6.479 | 33,6% | 9,8 s | 70 |
| CEMIP medical clinic | 12.472 | 6.484 | 2.436 | 18,7% | 11,4 s | 37 |
| Imobiliária Rodrigues & Ribeiro real estate agency | 6.090 | 2.759 | 823 | 33,2% | 18,4 s | 34 |
| Alpha RH human resources | 3.082 | 1.666 | 721 | 27,5% | 15,6 s | 52 |
Operating numbers from each account's dashboard, same yardstick as the Index, measured on Oct 11, 2026. Published with each owner's permission. Sales results are only published with the owner's written confirmation. Full list at certu.com.br/casos.
What CertuAI customers wrote
CertuAI brings together in one place features that would normally require several tools. Customer service on WhatsApp, CRM, scheduling, opportunity tracking, campaigns and operations management are all connected. Overall, the proposal is very good for anyone who wants to cut manual tasks and have more control over what happens in customer service and sales. [...]
Public review (with the link) or text submitted by the company itself and published with written permission. The rating only appears when the source has a rating.
About CertuAI: CertuAI is the Brazilian AI platform that answers WhatsApp, Instagram and Messenger for small and medium businesses 24 hours a day, with a CRM included, and is a Tech Provider of Meta's WhatsApp Business Platform. Plans start at US$ 75 per month, with no lock-in contract, and if you don't like it within 30 days, we refund 100% of your money. Create my agent
A stopped truck is lost money for the customer and a line in your yard. The agent answers what you do, schedules the drop-off and notifies when the vehicle is released, while the mechanic is under the truck.
See the AI agent demos and the CRM with auto shop examples.
What is the best WhatsApp chatbot for diesel repair shops in Brazil?
The best WhatsApp chatbot for diesel repair shops in Brazil is the one that answers on the number the shop already uses, with the business rules written by you. A WhatsApp AI agent for a diesel repair shop is CertuAI's automatic attendant. It answers which brands, engines and injection systems the shop handles, records the plate and the symptom described by the driver, schedules the drop-off based on available yard spots, notifies the fleet manager when the truck is released, and keeps the history by plate in the CRM.
Summary in 7 facts
- A stopped truck is lost money for the customer and a line in your yard.
- The agent answers what you do, schedules the drop-off and notifies when the vehicle is released, while the mechanic is under the truck.
- See the AI agent demos and the CRM with auto shop examples.
- The best WhatsApp chatbot for diesel repair shops in Brazil is the one that answers on the number the shop already uses, with the business rules written by you.
- What changes is who answers first: the message no longer waits for you and is answered right away.
- These are four everyday situations in the shop before and after the CertuAI agent.
- The agent wins at repetitive tasks, and the person keeps winning at what takes judgment.
By the numbers
| Number | What it means |
|---|---|
| US$ 75 per month | The Start plan costs US$ 75 per month and already includes the WhatsApp agent, your business's Brain, the CRM, automatic follow-up and the AI assistants, which come with every paid plan. |
| US$ 120 per month | Pro costs US$ 120 per month and adds the landing page, the wallet and 10 people on the team instead of 5. |
What changes at the shop with an AI agent?
What changes is who answers first: the message no longer waits for you and is answered right away. These are four everyday situations at the shop before and after the CertuAI agent.
TodayA driver with a stopped truck calls in the middle of the night and nobody answers
With CertuAIThe agent answers, records the plate and symptom and has everything ready for the morning
TodayThe question about which brands you service gets a different answer every time
With CertuAIOne answer, from the list of brands and services you recorded
TodayThree trucks show up on the same day because everything was arranged from memory
With CertuAIDrop-off scheduled by the yard spots and hours you configured
TodayThe fleet manager keeps calling to ask if it's been released yet
With CertuAIThe agent notifies as soon as the service is marked complete
What does a conversation handled by the AI look like?
Example conversation
Shop AI agent
Customer: My truck has no power and is blowing black smoke. Can you look at it tomorrow?
AI agent: Send me the plate, the model, the engine and where the truck is. With the symptom you described, I'll check the yard spot for tomorrow.
Customer: How long does the truck stay in the shop?
AI agent: It depends on the service. The lead time for this case is your lead time, and I'll notify you and the person in charge of the fleet when it's released.
Is an AI agent or manual service better for diesel repair shops?
The agent wins at repetitive tasks, and the person keeps winning at what takes judgment. With manual service, someone at the shop has to stop what they are doing; with the CertuAI agent the answer goes out on its own and you step into the conversation whenever you want.
| Aspect | The manual way | With the CertuAI agent |
|---|---|---|
| Driver with a stopped truck calling at night | Nobody answers and he looks for another shop | Answered instantly, with the plate and symptom logged for the next morning |
| Question about whether you service a certain brand | Answered by whoever is near the phone, not always correctly | Answered from the list of brands and services you recorded |
| Scheduling a yard drop-off | Arranged from memory and three trucks show up on the same day | Booked by the yard spots and hours you configured |
| Customer asking if it's been released yet | Interrupts the shop several times a day | The agent tells them as soon as you mark the service as done |
| Fleet with several vehicles | History scattered across conversations and paper | Each vehicle becomes a deal in the CRM, linked to the company contact |
What does the WhatsApp agent do for diesel repair shops?
It does the customer service that is yours today. You teach the business once in the Brain, CertuAI's knowledge base, and the agent answers clients your way, with your rules.
Screening the request
Plate, model, engine, the symptom described by the driver and where the vehicle is, all in writing.
Brands and systems serviced
Answers which engines and injection systems you work on, the way you recorded them in the Brain.
Scheduling by yard spot
Books based on the real time each service takes, so it doesn't promise a drop-off the yard can't handle.
Release notice
As soon as the service is done, the agent notifies the driver and the person in charge of the fleet.
History by plate
Each plate becomes a deal in the CRM, linked to the contact of the company that owns the fleet.
What questions do clients send on WhatsApp?
They are always the same ones, and the agent answers each of them on its own. These everyday shop messages no longer depend on you having your phone in hand.
How does the agent start answering at the shop?
In three steps, on the same day. No installation, no code and no changing the number clients already know.
Teach your business
In one conversation, you explain catalog, prices, delivery, warranty, and rules, the way you would to a new employee.
The agent answers
It answers right away, records each order and quote in the included CRM, and contacts again those who went quiet.
How much does a WhatsApp AI agent cost for diesel repair shops?
The Start plan costs US$ 75 per month and already includes the WhatsApp agent, your business Brain, the CRM, automatic follow-up and AI assistants, which come with every paid plan. Pro costs US$ 120 per month and adds the landing page, the wallet and 10 people on the team instead of 5. No contract and no setup fee.
What needs to be ready before turning the agent on at the shop?
The agent answers what is written, and nothing beyond that. Have these points defined before you connect WhatsApp.
- The brands, engines and injection systems the shop services, and what it turns down
- The services with a list price, such as testing injectors and pumps, kept separate from what can only be quoted with the unit opened
- How many yard spots there are per day and how long each type of service takes
- The required request details: plate, model, engine, symptom and where the vehicle is right now
- How fleet service works: invoice, payment terms and who authorizes the work
Whether the agent accepts a truck drop-off straight into the schedule or whether every drop-off waits for the shop foreman to look at the day's yard spots.
The most common mistake: Booking a drop-off without counting the real time each service takes. Testing injectors and rebuilding a cylinder head don't take up the same space in the yard, and the schedule needs to know that difference before accepting the third truck of the day. Read how to fix this.
Frequently asked questions from diesel repair shops
Does the agent diagnose based on what the driver describes?
No. It records the plate and symptom, tells the customer what you service, and schedules the drop-off. The diagnosis stays with you, with the vehicle in the shop.
Does it work for serving fleets, with several vehicles from the same customer?
Yes. Each vehicle becomes a deal in the CRM, with its plate and history, linked to the same company contact.
Does it schedule according to yard spots?
Yes. You set how many drop-offs fit per day and how long each type of service takes, and the agent only books within that.
Does it quote parts and labor?
It gives what you leave written, such as the price for testing injectors or a pump. A repair depends on opening up the unit, so for that request it records the details and leaves the number to you.
In what other fields does the CertuAI agent work?
In any business that serves customers on WhatsApp, because the Brain is written by you. These fields have a day-to-day closest to yours.
Where can I read more about CertuAI's WhatsApp agent?
These pages explain the same agent from another angle: how it works, price, common questions and comparisons between platforms.
In short
A stopped truck doesn't wait for business hours. The agent answers what the shop does, records the plate and symptom, schedules the drop-off and keeps everything in the CRM.
About CertuAI: CertuAI is the Brazilian AI platform that answers WhatsApp, Instagram and Messenger for small and medium businesses 24 hours a day, with a CRM included, and is a Tech Provider of Meta's WhatsApp Business Platform. Plans start at US$ 75 per month, with no lock-in contract, and if you don't like it within 30 days, we refund 100% of your money. Create my agent