Joybuy Insights

Choosing car tools: a practical guide to diagnostics, maintenance and repairs

If you work on your own car, you’ll soon find that not every piece of car tool is suited to every job. A cheap ratchet can develop play, a cordless drill may not deliver enough power, and an OBD2 scanner may support fewer vehicle systems than its product title suggests. So the right choice starts with what you’ll use it for, not the number of pieces in the set or a big torque claim.

Common pitfalls when choosing car tools

1. A high torque figure doesn’t tell the whole story

Cordless drills and impact wrenches are often advertised with just their maximum torque. That figure doesn’t automatically tell you how suitable the tool is for wheel bolts, seized fasteners or extended use. Check the following too:

  • the drive type, for example a 1/2-inch square drive;
  • the number of speed settings;
  • whether a battery and charger are included;
  • whether the stated figure is a maximum or an adjustable setting;
  • whether suitable impact sockets are included.

When fitting parts, don’t use an impact wrench as a substitute for a torque wrench. It’s best to finish tightening to the torque specified by the vehicle manufacturer.

2. A large tool set isn’t always complete for your car

A socket set with 108 or 172 pieces may look comprehensive, but check what’s included. For modern cars, metric sockets, deep sockets, E-Torx and standard Torx are often more useful than a large number of bits you’ll never use. Also check which sizes you actually need.

A car tool set should be easy to keep organised. Pieces without clearly marked sizes are more likely to get lost. A sturdy case with dedicated slots is practical both in the garage and for mobile mechanics.

3. A diagnostic tool won’t automatically work with every car

An OBD2 scanner can read fault codes, but its functions vary considerably by make, model and year. Before buying, check:

  • support for OBD2/EOBD and, where relevant, CAN FD;
  • coverage of the engine, transmission, ABS and airbags;
  • which reset functions are available;
  • whether you need an app, an account or a paid update;
  • compatibility with your exact vehicle.

According to the manufacturers’ product descriptions, functions such as ABS bleeding, battery registration and injector coding can vary by vehicle. So think of a car diagnostic tool as an aid to checking your vehicle, not a guarantee that it will fully resolve a fault.

Important specifications for car repair tools

Drive type, material and fit

For many maintenance jobs, 1/4-inch, 3/8-inch and 1/2-inch drives are useful. A 1/4-inch ratchet is well suited to smaller fasteners and tight spaces. A 3/8-inch ratchet set is versatile. A 1/2-inch ratchet or impact wrench is suitable for larger sockets and jobs around the wheels and suspension.

Check the material of the sockets. The product descriptions for the sets mentioned specify chrome vanadium steel (Cr-V) for sockets and ratchets, and S2 steel for bits. S2 bits are designed to offer greater hardness and wear resistance than standard softer bits. Only use impact-rated sockets with an impact wrench; standard chrome-plated sockets aren’t necessarily designed for this.

Controlling force

A torque wrench is important when a fastener needs to be tightened to a specified torque. An impact wrench is mainly useful for loosening bolts or quickly fitting them before final tightening. Don’t rely on the tool for the final check.

With a cordless drill or electric wrench, an adjustable speed, forward and reverse settings, a sturdy handle and a usable battery matter more than a high marketing claim alone. Also check the charging time and whether a spare battery is available.

Accessing specific components

A standard open-ended spanner is often less suitable for brake lines. According to the product description, a flare nut spanner grips several sides of the union nut, reducing the risk of damaging it. For hard-to-reach fasteners, extensions, universal joints and a Torx socket set are useful additions.

Only work on brakes, airbags and electrical systems if you have the right knowledge and safety equipment. If in doubt, consult a qualified garage.

Our recommendations by user type

Suitable for: Budget-conscious beginners
121-Piece Mechanics Tool Set with Socket Kit

121-Piece Mechanics Tool Set with Socket Kit

Why it suits this user type: A versatile starter set for car owners who want to carry out maintenance on their car or motorbike without having to buy individual tools.

How this product avoids the pitfall

The contents are clearly specified: 121 pieces, metric and SAE sockets, 1/4- and 3/8-inch ratchets, bits and a storage case.

Key benefits and features

Cr-V steel sockets, quick-release ratchets, 40 bits, 18 hex keys and a portable case.

Suitable for: Buyers looking for premium quality
WORKPRO 172-piece bit ratchet set

WORKPRO 172-piece bit ratchet set

Why it suits this user type: A good choice for garages, home mechanics and anyone looking to combine different drive sizes and Torx sizes in one set.

How this product avoids the pitfall

The product description lists 1/4-, 3/8- and 1/2-inch drives separately, along with deep sockets, Torx sockets, extensions and universal joints.

Key benefits and features

172 pieces, 72-tooth ratchets, S2 bits, marked sizes and a fitted storage case.

Suitable for: Specific jobs and intensive use
CONENTOOL 21V Brushless Cordless Impact Wrench

CONENTOOL 21V Brushless Cordless Impact Wrench

Why it suits this user type: A practical choice for changing wheels and regular jobs where cordless operation and a 1/2-inch drive are important.

How this product avoids the pitfall

Alongside the stated maximum torque, the product description lists three speed settings, a variable trigger and five included impact sockets.

Key benefits and features

21 V, brushless motor, 1/2-inch drive, LED light, two batteries and 17, 18, 21, 22 and 24 mm sockets.

Suitable for: DIYers focused on diagnostics
XTOOL D5S OBD2 Scanner

XTOOL D5S OBD2 Scanner

Why it suits this user type: Ideal for car owners and mobile mechanics who want to check several vehicle systems and maintenance functions as well as read fault codes.

How this product avoids the pitfall

The description explicitly lists support for the engine, transmission, ABS and SRS, while noting that functions can vary by make, model and year.

Key benefits and features

16 listed reset functions, CAN FD support, live data, automatic VIN recognition and a 5.45-inch touchscreen.

Looking for more options?

We’ve put together a complete, up-to-date list of products that meet these strict selection criteria and current European safety regulations.

Frequently asked questions about car tools

Which car tools do I need as a beginner?

Start with a ratchet set, metric socket set, extensions, screwdrivers, hex keys and a torque wrench. You can add specialist tools later, such as a flare nut spanner, Torx socket set or OBD2 scanner.

Is an impact wrench suitable for tightening wheel bolts?

An impact wrench is useful for loosening wheel bolts and tightening them initially. Always check the final torque with a torque wrench, following the vehicle specifications. Use suitable impact sockets and take care not to cross-thread the bolts.

How long does garage equipment last?

Its lifespan depends on the material, workload, storage and maintenance. Cr-V steel sockets and ratchets are suitable for many routine maintenance jobs, but overloading, rust and incorrect use can cause damage. Store your tools in a dry place, keep sizes organised and use the right type of spanner for each job.