Buyer's guide

The Honest John alternative: how to research a used car for free

Your old routine started on one site. Here's the rebuilt version: known faults, real MPG and the car's own history, in the order that saves you a wasted trip.

There's no single Honest John alternative, because the site bundled four different jobs. The Good & Bad known faults are rebuilt free at caradvertcheck.co.uk/problems, Real MPG is rebuilt free at caradvertcheck.co.uk/real-mpg, the MOT Files pass rates have not been replaced yet, and the car reviews moved to Drive.co.uk. For an individual car rather than a model, gov.uk's MOT history service, the DVLA vehicle enquiry and the recall checker are free, official and cover what Honest John never did.

The short version

  • Honest John was four things at once, so no single site replaced it. Known faults and Real MPG are rebuilt free here; MOT pass rates are still to come; the reviews went to Drive.co.uk.
  • Research the model first and the specific car second. The model tells you what to look for, and the car's MOT history tells you whether it happened.
  • On a fault page, only the rows matching the exact engine and year in the advert matter. The engine variant, the repair cost range and the source badge are the three things to read.
  • gov.uk's MOT history is free and complete, but it flags nothing. Reading the mileage as a sequence rather than a list is where the useful information is.
  • Every free official service covers the car. None of them reads the advert, which is the one part of a used-car listing that nobody checks.

If your used-car routine used to start on Honest John, it needs rebuilding. The site closed in August 2026 and the checks you did there are now spread across several places, some ours and some official. Here's how to run all of them on one car, in about ten minutes, without paying for anything.

What's the best Honest John alternative?

There isn't a single like-for-like one, and anybody telling you otherwise is overselling. What Honest John did was bundle four different jobs into one site, and those four jobs now live in four places:

What you used Honest John forWhere it is now
Good & Bad, the known faults per modelOur free common problems pages, rebuilt with 593 faults researched from the archived pages
Real MPG, real-world fuel economyOur free Real MPG section, 776 models with official figures alongside
The MOT Files, pass rates by modelNowhere yet. We're building it from DVSA open data
Car reviewsMoved to Drive.co.uk, which took the reviews and left the data behind

For the individual car rather than the model, the official free services are unbeatable and always were: MOT history, the DVLA vehicle enquiry and the recall checker. Honest John never replaced those and neither do we. There's a fuller breakdown in what happened to Honest John.

The rest of this is the practical bit: how to run one car through all of it, in order.

What is the advert not telling you?

Paste the advert text and the registration. We read it against the car's DVSA MOT history and our known-faults database, then tell you what the seller left out.

Check an advert now (free) →
Free report, no credit card required.

Step one: what does this model go wrong with?

Start with the model, before you get attached to the specific car. Go to common problems, pick the make, pick the model, then find the generation that matches the year in the advert.

What you're reading for is not "does this car have faults", because every car has faults. You're looking for the two or three rows that match the exact engine and year in front of you. A Nissan Qashqai page carries faults for the J10 and the J11, for petrol and diesel, for manual and CVT. Only a handful apply to the car you're looking at, and those are the ones worth memorising before you ring the seller.

Three things on each row do the work:

  • The engine variant. "All Xtronic CVT automatics" is a completely different warning from "1.5 dCi". If the advert doesn't say which gearbox or engine, that's your first question.
  • The typical repair cost. A UK range rather than a quote. It tells you whether this is a haggling point or a walk-away.
  • The source badge. Owner reports, Editorial, Specialist mechanic or Official recall. They're different weights of evidence and you should treat them differently.

Recalls sit in the same table at £0, because having one done is free. Whether it has actually been done on this car is something you check separately on the DVSA recall service with the registration.

Step two: does it really do what the advert claims to the gallon?

Now the running costs. Go to Real MPG, find the same model and generation, and read the row for the engine in the advert.

Two columns matter. The owner-reported average is what people actually get. The percentage of official tells you how flattering the brochure figure was, and an asterisk means it's measured against the newer WLTP test rather than the older NEDC one, so asterisked and non-asterisked percentages aren't comparable. As a rule, an NEDC-era car returning about 80% of official is normal, and there's a full explanation in why your MPG is lower than the official figure.

This step is where a lot of buyers save themselves from the wrong car entirely. A small turbocharged petrol with a spectacular brochure figure can return a fifth less than the advert's "cheap to run" implies, and if you're doing 20,000 miles a year that difference matters more than the price difference between two cars on the same forecourt.

Step three: what has this specific car actually done?

Everything above is about the model. This step is about the one car, and it's free and official: put the registration into gov.uk's MOT history service. You get every test, every mileage reading, every failure and every advisory, going back years.

Read it as a sequence rather than a list. What you're looking for is mileage that climbs steadily and then doesn't, advisories that appear year after year without ever becoming a repair, big gaps where the car wasn't tested, and failures for things the model is known for. A recurring "nearside front suspension arm has slight play" that has been quietly copied forward for three tests is a job nobody has done, and it's a job you'd be buying.

What do the source badges actually mean?

They tell you how much weight to put on a row, and they're on every fault we publish:

BadgeWhat it meansHow to treat it
Owner reportsReported by owners, mostly sourced from the archived Good & Bad pagesA pattern worth checking, not proof. Owners write in more when things go wrong
EditorialOur own research from published sourcesVerified against more than one source before it goes up
Specialist mechanicFrom people who fix these for a livingThe strongest evidence on how a fault actually presents
Official recallOn file with the DVSAFree to have done, and checkable on the registration

Repair costs across all of them are typical UK ranges rather than quotes. What you pay depends on the car's condition and your garage.

What does this look like on a real advert?

Say the advert is a 2012 Qashqai, 1.5 dCi, 96,000 miles, "full service history, drives faultless, just needs an MOT".

  • Problems page. The J10 1.5 dCi carries an EGR valve that sticks closed, which can take the turbo with it, at £800 to £2,000. It also carries timing belt failure, sometimes caused by a failed auxiliary belt getting into the timing belt, at £3,000 to £5,500. At 96,000 miles the belt question is the whole conversation.
  • Real MPG. Look up what J10 1.5 dCi owners actually average, so "cheap to run" becomes a number you can budget against rather than a phrase in an advert.
  • MOT history. Check whether the mileage climbs sensibly to 96,000, whether there are advisories that keep reappearing, and whether the last test was recent or the car has been sat.
  • The advert itself. "Just needs an MOT" on a car with a known belt interval question is a sentence to ask about, not skip past. So is "drives faultless" from a seller who hasn't mentioned the cambelt.

Four passes, all free, and by the end you know exactly what to ask before you drive anywhere.

What does a check add on top of all this?

Being straight about it: on the provenance records, nothing that anybody else can't get either. Outstanding finance comes from the lenders, theft markers from the police, write-off records from the insurance industry, and every check in the country reads the same registers. Nobody holds a private source.

What's different is that all four passes above happen at once, against each other, on the advert you're actually looking at. That last part is the bit no plate lookup does, because every other check in this country starts with a registration and has never read a word the seller wrote. Our free scan takes the advert text, reads it against the car's full DVSA MOT advisory history and the known faults for that exact engine and year, and hands back a verdict, a risk score and the biggest thing it found. No card, no password. The Qashqai example above is exactly the shape of it: the fault list, the advisory history and the phrase "just needs an MOT" mean something different together than they do apart, and putting them together is the actual job.

The free pages stay free regardless, and they're not a teaser. Common problems, Real MPG and the car data hub are open, complete, and there whether you ever run a scan or not, because data like this only works if everyone can check it.

What none of it can do is see unrecorded accident damage or judge the quality of a repair. Neither is in any database at any price, ours or anyone else's, which is why the last step is always looking at the car.

So: read the model pages, then run the free scan on the advert before you commit an evening to a viewing. If it turns something up worth going deeper on, the free report upgrades on the same link afterwards without re-running anything, so nothing's wasted if the answer is walk away.

The short version

There's no single Honest John replacement, because it was four things at once. Known faults are rebuilt free on our common problems pages, real-world fuel economy on Real MPG, MOT pass rates are still to come, and the reviews went to Drive.co.uk. For the individual car, gov.uk's MOT history, DVLA enquiry and recall checker are free and official and always will be. Run the model first, the car second, and read the advert against both.

Common questions

Is there a direct replacement for Honest John?

No single one. The Good & Bad fault data and Real MPG are rebuilt free at caradvertcheck.co.uk, the car reviews moved to Drive.co.uk, and the MOT Files pass rates haven't been replaced yet. For an individual car, gov.uk's MOT history, DVLA vehicle enquiry and recall checker are free and official.

Are the rebuilt fault and MPG pages free?

Yes, permanently, and they're not a teaser. The common problems pages, the Real MPG section and the car data hub are open and complete whether you ever run a check or not, because this kind of data only works if everyone can see it.

What order should I check a used car in?

Model first, car second, advert last. Read the known faults for the exact engine and year, look up what owners really get to the gallon, then pull the car's MOT history on the registration and read the mileage and advisories as a sequence. Then go back to the advert and see what the seller didn't mention.

What does the source badge on a fault mean?

It says where the row came from, so you can weigh it. Owner reports came from owners, mostly recovered from archived Good & Bad pages. Editorial is our own researched entries. Specialist mechanic came from people who fix these for a living. Official recall is on file with the DVSA and free to have done.

Can I check MOT pass rates by model anywhere?

Not on our site yet. It's being built from DVSA's published MOT results and will be free like the rest. In the meantime the individual car's own MOT history on gov.uk tells you more about that specific car than a model-level pass rate would.

How is Car Advert Check different from a free gov.uk check?

The gov.uk services are free, official and worth using, and they cover the car. None of them reads the advert. Our free scan takes the seller's own wording and reads it against the full MOT advisory history and the known faults for that exact engine and year, so a claim like "drives faultless" gets checked against what the record actually shows.

What is the advert not telling you?

Paste the advert text and the registration. We read it against the car's DVSA MOT history and our known-faults database, then tell you what the seller left out.

Check an advert now (free) →
Free report, no credit card required.

Sources

Matt Hale, founder of Car Advert Check

Matt Hale

Founder, Car Advert Check

Matt is the friend people send car adverts to before they buy. He has fixed everything from diggers to cars to motorbikes, has lived in and around motorhomes, and has lost count of the listings he has been asked to look over. He builds software for a living, so he gets asked about scams as well, car ones and everything else. He built Car Advert Check for the people who have not got a mechanically minded mate to ask, or who would rather not keep asking.

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