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Mechanics aren't fans of improvised repairs -

Mechanics prefer it if you leave it to them to fix things. This is because they have a wealth of tools specifically for auto repair, while most car owners only have one or two.

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You can buff dents or scuffs out yourself -

Fixing dents, scuffs, and scratches can be costly. While you won't get professional-grade work, fixing them yourself is totally doable. And if you're unhappy with the results, your mechanic can refer you to a body shop.

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You can ask to see the old and new parts -

Ask the mechanic to see any old parts they take off and any new parts they put on. The new parts shouldn't look used in any way, and if the old parts don't look worn or damaged, they may not have need to be replaced.

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You don't need a coolant flush -

Coolant flushes and power steering fluid flushes are commonly recommended but are unnecessary. 

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Read before you sign -

Never sign a blank authorization form and always get a signed breakdown of specific estimates for each job, plus the warranties that apply.

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You can diagnose a problem yourself -

It's not uncommon for several lights to show up on your dashboard. A mechanic may charge you for each one of the lights when it's just one problem causing them. Ask your local car parts store to run a computer scan to find out the issue and save yourself some money. 

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Have your car test driven -

A test drive is just as important as a service, and it might mean the difference between needing new brake pads and a complete rotor replacement.

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Request a name-brand replacement -

The market is being flooded with cheap parts, so always request a name-brand replacement and ask to see its original packaging.

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Go early in the week -

Schedule your car service or maintenance early in the workweek. If you have a Friday afternoon appointment, the mechanic may rush the job to get out for the weekend.

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Get a second opinion -

Mechanics often convince vehicle owners that their car needs an expensive repair. Take the car to another shop for a second opinion, and you may notice a difference in the quotes.

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Check for certifications -

If you're in the US, reputable shops will display ASE, National Institute for Automotive Service Excellence, or AAA (America Automobile Association) certification and their state license.

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Ask questions -

Inquire into years in business, warranties offered, licenses, and types of equipment used. 

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Look out for the right equipment -

Professional car mechanics should use an engine analyzer and scan tool. If they don't, they should be avoided.

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You can change oil yourself -

Oil changes are the most common maintenance need for cars. You can buy oil-change kits at an auto parts store for less than a mechanic would charge. 

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You can do your own brake jobs -

Changing brake pads and rotors isn't easy, but if you learn how to do it, you'll save yourself a lot of money in the long run.

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Buying a new car might be your best option -

Mechanics want you to buy a used car and employ them to repair it. Not much goes wrong with a new car, and if it does, the dealership will usually fix it under warranty. 

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Don't be tricked by double labor -

If a car mechanic offers to fix two issues, question how long the second job would take. Some will charge you double labor even though the second task was done at the same time as the first.

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Always ask for the old parts back -

Ask the mechanic for any old parts to know they've been changed.

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Watch out for scams -

Be wary if your mechanic recommends a transmission flush. Manufacturers don't recommend them, and your car rarely needs one.

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You don't need synthetic oil -

It's always best to go with the oil recommended by your manufacturer. Keep in mind that synthetic oils are more expensive and not always necessary.

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You may be paying too much for parts -

Don't assume you're getting the best price through your mechanic. It's common to find parts at a lower price elsewhere.

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Old-school mechanics might not know it all -

Families often go to the same mechanic for years. However, you want to make sure the mechanic has modernized and uses automation, technology, and modern equipment.

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Smaller things may get overlooked -

If the mechanic has a limited amount of time, they may overlook smaller tasks like lubricating door hinges or latching mechanisms, which can affect performance over time. Check the smallest tasks have been completed before you drive away.

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Too good to be true -

Beware of false promises or promotions that seem too good to be true. No mechanic can make money from offering US$100 brake jobs.

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Try to make the noise -

If your car is making strange noises, your mechanic would rather you swallow your pride and imitate the sound than try and describe it. 

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Ask about your tires -

Ask the mechanic about your tires' "build date." You may receive older treads, which is particularly risky for snow tires.

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Consult your dealership -

Consult your car dealer before you get any work done, as some parts, like catalytic converters, carry a long warranty, and a free replacement is often required by law.

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Familiarize yourself with tire tread -

Know your state or country's tread specifications before buying new tires, then have the mechanic measure the old tread with a gauge.

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Dealerships vs private shops -

While it's often encouraged to support small businesses, large dealerships often have access to wider resources. Some model-specific information may not be available to your local mechanic.

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Find expert mechanics -

Communication and transparency are key. A good car mechanic will explain repair phases and give you choices throughout the process.

Sources: (Business Insider) (Reader's Digest)

See also: What to look for when buying a used car

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