Hiring a mobile mechanic shouldn't be a gamble. Here are the exact questions that separate brilliant professionals from expensive mistakes – ask these before handing over your keys or your money.
You've found a mobile mechanic. Their van looks professional, their Google reviews are decent, and they're available this week. Brilliant. You're about to book them.
But here's the thing: that 20-minute phone call or message exchange before you commit could save you hundreds of pounds and an enormous amount of stress. Or it could be the moment you spot red flags that tell you to run a mile in the opposite direction.
The problem is, most people don't know what to ask. They ask vague questions like "are you good?" (nobody says no to that) or "can you fix my car?" (of course they'll say yes, even if they've no idea what's wrong with it yet). These questions tell you precisely nothing useful.
We've spoken to dozens of car owners who've had nightmare experiences with mobile mechanics – overcharging, bodged repairs, disappeared without finishing work, used wrong parts, caused additional damage. In almost every case, the warning signs were there from the very first conversation. They just didn't know what questions to ask to spot them.
This guide fixes that. These are the specific questions that reveal whether you're dealing with a qualified professional or a chancer in a van. Some questions verify credentials. Some test their knowledge. Some reveal their business practices. All of them protect you.
Ask these questions. Listen carefully to the answers. Trust your gut if something feels off.
Before We Start: How to Use These Questions
You don't need to interrogate them like you're conducting a police interview. But you do need to ask the important ones, especially if this is your first time using them or if significant money is involved.
For small jobs (oil change, battery): Ask 4-6 key questions
For medium jobs (brakes, service, diagnostics): Ask 8-10 questions
For major jobs (clutch, expensive repairs): Ask all relevant questions
Good mechanics expect these questions and answer them happily. Bad mechanics get defensive, evasive, or irritated. That reaction alone tells you everything.
Write down their answers – Especially insurance details, warranty terms, and pricing. If they won't put something in writing that they've promised verbally, that's a massive red flag.
Right, let's get into the questions.
Category 1: Qualifications and Experience
These questions verify they actually know what they're doing and have the credentials to prove it.
Question 1: "What qualifications do you have?"
What you're listening for:
- ✅ "City & Guilds Level 3 in Light Vehicle Maintenance"
- ✅ "IMI Level 3 certified"
- ✅ "NVQ Level 3 Motor Vehicle"
- ✅ Plus any specialist certifications (EV training, manufacturer courses)
Red flags:
- ❌ "I've been doing this for years, don't need qualifications"
- ❌ Vague answers: "I'm fully qualified"
- ❌ "I worked in garages for ages" (without mentioning actual qualifications)
- ❌ Getting defensive about the question
Why this matters: Anyone can buy a van and tools. Qualifications prove they understand vehicle systems, can diagnose properly, and work safely. City & Guilds Level 2 is minimum acceptable; Level 3 is what you want.
Follow-up: "Can I see copies of your certificates?" Legitimate mechanics keep these in their van or can email them. Those who can't produce them probably don't have them.
Question 2: "How long have you been a mobile mechanic specifically?"
What you're listening for:
- Clear, specific answer: "Three years mobile, ten years total as a mechanic"
- Understanding that mobile work is different from garage work
Why this matters: Being a great garage mechanic doesn't automatically make you a great mobile mechanic. Working on driveways, managing parts logistics, troubleshooting without comprehensive facilities – these are distinct skills. You want someone with at least 1-2 years mobile experience, ideally more.
Red flags:
- ❌ "Started last month" (unless they're priced accordingly)
- ❌ Can't clearly state how long they've been operating
- ❌ Recently left garage under unclear circumstances
Question 3: "Have you worked on [your car make/model] before?"
What you're listening for:
- ✅ "Yes, I work on VWs regularly" or "I've done this exact job on your model"
- ✅ Or honest: "Not that specific model, but I've done similar work on the same engine/platform"
Red flags:
- ❌ "I can fix anything" (nobody can)
- ❌ Obvious lack of familiarity with your vehicle
- ❌ For complex/unusual vehicles: claiming expertise they clearly don't have
Why this matters: Some vehicles are straightforward (Ford, Vauxhall, common VWs). Others are complicated (BMWs with complex electronics, French cars with quirky designs, anything Italian). If they've never touched your vehicle type, they're learning on your dime.
Question 4: "Do you have specialist training for [relevant work]?"
Ask this if:
- You have an electric or hybrid vehicle: "Do you have IMI Level 3 high-voltage certification?"
- Work involves LPG: "Are you Gas Safe registered for automotive work?"
- It's a classic car: "Do you have experience with carburettors/older systems?"
Why this matters: You cannot legally work on high-voltage EV systems without certification. You shouldn't work on LPG without Gas Safe registration. Classic cars need different knowledge than modern vehicles.
Red flags:
- ❌ "I'll figure it out" (not acceptable for specialist work)
- ❌ Claims EV expertise without IMI certification
- ❌ Dismissive of safety concerns
Category 2: Insurance and Legal Protection
These questions protect you if something goes wrong.
Question 5: "What insurance do you carry?"
What you need to hear:
- ✅ "Public liability insurance – £2 million" (minimum £1 million, but £2-£5 million is better)
- ✅ "Professional indemnity insurance – £1 million+"
- ✅ "Tool insurance" (shows they're professional)
- ✅ "Business van insurance" (legal requirement)
Critical follow-up: "Can I see proof of insurance?"
They should: Have certificates in van or email them to you immediately. This isn't optional – you need to verify insurance exists.
Red flags:
- ❌ "Yeah, I'm insured" (vague, no details)
- ❌ Reluctant to show certificates
- ❌ "I'll email them later" then never does
- ❌ Only has van insurance (not enough)
Why this matters: If they damage your car, drop a tool through your windscreen, or cause a fire, their public liability insurance pays for it. Without insurance, you're suing them personally (if you can find them) or claiming on your own insurance (affecting your premiums).
Real example: Mobile mechanic dropped gearbox, cracking customer's driveway (£800 damage). Had proper insurance, claimed, paid out. No insurance? Customer's problem.
Question 6: "Are you registered as a business and paying tax?"
What you're listening for:
- ✅ "Yes, I'm registered as self-employed with HMRC"
- ✅ Or: "Yes, I'm a limited company" (better, shows established business)
- ✅ They can provide business name and registration details
Why this matters: Legitimate businesses pay tax and have proper insurance. Cash-only cowboys who aren't registered are:
- Not insured (insurance requires business registration)
- Not paying tax (illegal)
- Impossible to track down if work fails
- Provide no comeback if problems arise
How to verify: Ask for proper invoice with their business details and VAT number (if VAT registered). Legitimate businesses always provide invoices.
Red flags:
- ❌ "Cash only, no paperwork"
- ❌ Can't provide business name or registration
- ❌ Aggressive about not paying tax: "It's legal, cash in hand"
- ❌ Offers discount for no invoice
Important: You're not responsible for checking their tax status, but working with unregistered, uninsured operators puts you at risk.
Category 3: Pricing and Transparency
These questions ensure you understand exactly what you're paying and why.
Question 7: "What's your hourly rate and call-out fee?"
What you're listening for:
- Clear, confident answer: "£50 per hour plus £55 call-out"
- Pricing in line with local market (check our pricing guide)
- Willingness to explain the charges
Red flags:
- ❌ Evasive or changes price during conversation
- ❌ "Depends..." (without clear explanation of what it depends on)
- ❌ Drastically below market rate (suspiciously cheap = corners cut)
- ❌ Reluctant to commit to pricing upfront
Follow-up questions:
- "Is that including VAT?" (adds 20% if they're VAT registered)
- "Are there any other fees?" (parking charges, disposal fees, etc.)
- "What's the minimum charge?" (some have minimum 1-hour charge even for 20-min jobs)
Question 8: "Can you give me a written quote before starting work?"
What you're listening for:
- ✅ "Yes, absolutely. I'll provide written quote once I've assessed the work"
- ✅ For routine work: "For a full service on your car, it's £180-£200 – I'll confirm exact price when I see it"
Red flags:
- ❌ "I'll tell you the price after" (unacceptable)
- ❌ "Trust me, it'll be fair" (you need concrete numbers)
- ❌ Won't provide written quote for expensive work
Why this matters: Written quotes protect both parties. You know maximum cost. They can't inflate price after work is done. Everything's documented.
Important: Quotes should be detailed:
- Labour hours and rate
- Parts needed and costs
- Call-out fee
- Any additional charges
- Total price
Generic "should be about £200" isn't good enough for major work.
Question 9: "How do you price parts – do you mark them up?"
What you're listening for:
- ✅ Honest answer: "I add 20-30% to trade price to cover sourcing and warranty"
- ✅ Or: "You can supply parts yourself if you prefer, but warranty only covers my labour"
- ✅ Specific about parts quality: "I use Bosch/Delphi/quality brands"
Red flags:
- ❌ Evasive about markup
- ❌ Won't specify parts brands
- ❌ Insists on supplying parts with no transparency on cost
- ❌ Massive markup (100%+) with no justification
Why this matters: Some markup is reasonable and expected (20-30% is standard). You're paying for their time sourcing, their warranty responsibility, and convenience. But 100% markup on parts you could buy yourself is taking the piss.
Your choice: If you want to save money, offer to supply parts yourself. But understand: if parts are wrong or faulty, that's your problem and you'll pay for the second visit.
Question 10: "What warranty do you offer on parts and labour?"
What you need to hear:
- ✅ "12 months warranty on both parts and labour" (gold standard)
- ✅ Minimum acceptable: "6 months warranty"
- ✅ Specific about what's covered: "If part fails or work is faulty within warranty period, I'll fix it free of charge"
Red flags:
- ❌ No warranty offered
- ❌ "Warranty only covers parts" (what about faulty work?)
- ❌ Vague: "I'll look after you" (not specific enough)
- ❌ Very short warranty (30 days or less)
Critical: Get warranty in writing on invoice. Verbal promises aren't enforceable.
Follow-up: "What if I have a problem – how do I reach you?" (You need direct contact details)
Why this matters: Warranties show confidence in work quality. Good mechanics stand behind their work. Cowboys disappear when work fails.
Category 4: Practical and Logistical
These questions cover how the work actually happens.
Question 11: "Where will you work on my car – what space do you need?"
What you're listening for:
- ✅ Specific requirements: "I need flat, solid ground – driveway or car park"
- ✅ Understanding of safety: "I need space to work safely, away from traffic"
- ✅ Realistic about limitations: "Some jobs I can't do on sloped driveways"
Why this matters: Mobile mechanics need appropriate working conditions. Steep slopes are dangerous. Gravel driveways can be problematic. On-street parking with passing traffic isn't always safe.
Be honest about your space: If you live in a flat with only street parking, say so upfront. They'll tell you if it's workable.
Red flags:
- ❌ "I can work anywhere" (unrealistic for some jobs)
- ❌ No safety considerations mentioned
- ❌ Willing to work in clearly unsafe conditions
Question 12: "How long will the work take?"
What you're listening for:
- ✅ Realistic timeframe: "Service takes 1.5-2 hours typically"
- ✅ Buffer built in: "Should be 2 hours, but if I find issues it might take longer"
- ✅ Honest about variables: "Depends what I find when I get into it"
Red flags:
- ❌ Unrealistically fast: "I'll do a full service in 45 minutes" (corners being cut)
- ❌ Can't give any timeframe at all
- ❌ Constantly changing estimate during work
Why this matters: You're arranging your day around this. You need realistic expectations. Mechanics who over-promise on speed either rush (bad work) or run late (annoying).
For major jobs: Ask if it's one visit or multiple. Some jobs (like timing belts) are substantial – 4-6 hours. Others might need two visits (diagnostic session, then repair once parts arrive).
Question 13: "What happens if you discover additional work is needed?"
What you're listening for:
- ✅ "I'll call/text you immediately with details and pricing before proceeding"
- ✅ "I'll show you the problem and explain why it needs doing"
- ✅ "You're never obligated to have additional work done"
Red flags:
- ❌ "I'll just sort it" (unauthorised work)
- ❌ "Most cars need extra work" (sounds like a scam setup)
- ❌ Vague about getting your approval first
Why this matters: This is where scam mechanics operate. You book for brakes (£200), they then tell you that you desperately need new discs, calipers, fluid, lines, basically rebuilding the entire brake system (£800+).
Good mechanics:
- Show you the problem
- Explain urgency (is it dangerous now, or can it wait?)
- Give you options
- Get explicit approval before proceeding
- Document everything
Important: "Additional work needed" is sometimes genuine. Worn brake discs when replacing pads is common. But you have the right to:
- See the problem
- Get second opinions
- Decline additional work
- Have only original work completed
Question 14: "Do you clean up after the work?"
What you're listening for:
- ✅ "Yes, I'll clean up any mess and take waste away"
- ✅ "I use protective mats/covers"
- ✅ Details about waste disposal (oil, batteries properly disposed)
Why this matters: Professional mechanics don't leave oil puddles on your driveway or used parts scattered around. They protect your property and clean up properly.
Environmental note: Used oil, batteries, and filters can't just be dumped in your bin. Ask how they dispose of waste. "I'll take it to recycling centre" is correct answer.
Question 15: "What if I'm not satisfied with the work?"
What you're listening for:
- ✅ "If there's any problem, call me straight away and I'll come back and look at it"
- ✅ Clear complaints procedure
- ✅ Confident they stand behind their work
- ✅ Mentions warranty coverage
Red flags: