Requex

Guides

Straight answers about your car

What that noise means, what a job should cost, and what actually matters when you buy. Written for people who own a car, not for mechanics.

Servicing

A new pleated air filter resting on a clean workshop surface

Car Filters Explained: What Each One Does and When It Matters

Your car has four filters doing four unrelated jobs, and they are the cheapest parts on the service list. Here is what each does and what happens when it clogs.

8 min read

A coolant expansion tank in a car engine bay

Coolant and Antifreeze Explained: Why the Colour Matters

Coolant is not just antifreeze, and the colours are not interchangeable. Here is what it actually does, why it expires, and why mixing types is expensive.

8 min read

A front car wheel and tyre viewed straight on from ground level

Do I Need Wheel Alignment? The Signs, and What It Actually Fixes

Do I need wheel alignment? The clearest evidence is not how the car drives, it is how the tyres are wearing. Here is how to read it before you pay for anything.

8 min read

An engine bay with the oil filler cap and dipstick visible

How Often Should You Change Engine Oil? The Honest Answer

How often should you change engine oil? The interval in your handbook assumes a driving pattern most people do not have. Here is how to read it properly.

8 min read

The underside exhaust system of a car seen on a workshop ramp

What Is a DPF, and Why Short Journeys Ruin It

A DPF traps diesel soot and burns it off, but only if the car gets hot enough for long enough. Here is how it works and how people accidentally kill it.

9 min read

An engine seen from the side with its front cover in view

When to Change a Timing Belt, and Why It Is Not Optional

When to change a timing belt: the interval is by age as well as mileage, there are no warning signs, and it is the one service item you do not defer.

8 min read

Diagnose it

An open car bonnet showing a clean modern engine bay

Burning Smell From Car? What Each One Usually Means

A burning smell from car vents or under the bonnet has a handful of likely causes, and they are not equally urgent. Here is how to tell which one you probably have.

7 min read

A car dashboard air vent seen close up in daylight

Car Air Conditioning Not Cold? What That Usually Means

Car air conditioning not cold any more? It rarely breaks suddenly. It fades, and the way it fades tells you whether this is a refrigerant job or something else.

8 min read

An empty straight road with clear lane markings seen from a driver's viewpoint

Car Pulls to One Side? Work Through It in This Order

When a car pulls to one side the causes run cheap to expensive in a predictable order. Here is how to work through them without paying for the wrong one.

7 min read

A road surface with a speed bump seen from low down

Clunking Noise Over Bumps? What the Suspension Is Telling You

A clunking noise over bumps is your suspension reporting play somewhere. Here is how to narrow it down by when and where you hear it, before you pay anyone.

8 min read

The pedals in the footwell of a manual car

Clutch Slipping? The Test That Confirms It in Thirty Seconds

A slipping clutch shows as revs rising without speed following. Here is the test that confirms it, what wears one out early, and what to expect on cost.

8 min read

A car dashboard seen from the driver's seat with the instrument cluster illuminated

Engine Management Light On? What the Colour and Behaviour Mean

Engine management light on and no idea how urgent it is? Steady amber, flashing amber and red mean three very different things. Here is how to tell.

9 min read

Tyres

A car tyre on tarmac with a small object embedded in the tread

Can a Punctured Tyre Be Repaired, or Does It Need Replacing?

Can a punctured tyre be repaired? There are clear rules, and where the nail went decides it more than how big the hole is. Here is how to know before you call.

8 min read

A new tyre standing on a clean floor with its label sticker visible on the tread

The EU Tyre Label Explained: What A, B and C Actually Mean

The EU tyre label explained in plain English. What the fuel letter, the wet grip letter and the decibel figure are measuring, and which one to care about.

9 min read

Four car tyres stacked neatly on a clean workshop floor

How Long Do Tyres Last? Mileage, Age and What Shortens Both

How long do tyres last? Mileage varies enormously with driving and car, and age matters separately. Here is what decides it, and what you can change.

8 min read

Close view of a car tyre tread on a driveway, grooves clearly visible

How to Check Tyre Tread Depth, and What the Tyre Is Telling You

How to check tyre tread depth with a coin, where to look, and how to read the wear pattern. Uneven wear is a symptom, and it names the fault.

9 min read

A cutaway view of a car tyre showing the thickness of its sidewall

Run Flat Tyres Explained: How They Work and What They Cost You

Run flat tyres let you keep driving after a puncture. Here is how they do it, what you give up in exchange, and whether to keep them when they wear out.

9 min read

Two new car tyres standing side by side on a clean workshop floor

Should You Replace Tyres in Pairs, or Is One Enough?

Should you replace tyres in pairs? Sometimes one is fine, sometimes it risks the drivetrain. Here is what decides it, and where the new pair should go.

8 min read