DIY Auto Maintenance: 35 Car Repairs You Can Tackle at Home -

Mechanic working on a car engine

By Steve Maxwell

Updated: September 16, 2024

Car maintenance can feel intimidating, but starting with small tasks can build your confidence and save you money. This guide outlines 35 DIY car repairs you can handle at home, ranging from simple fluid checks to more involved tasks like changing spark plugs.

Essential Fluid Checks and Top-Offs

Regular fluid checks are crucial for preventing breakdowns. Here’s what to monitor:

Engine Oil

Check engine oil weekly with the engine off and the car on a level surface. Refer to your owner’s manual for the recommended oil type and change intervals.

Checking engine oil level using dipstick

Brake Fluid

Check brake fluid weekly with the engine off. Low fluid levels can indicate a leak or worn brake pads.

Power Steering Fluid

Check power steering fluid levels weekly with the engine off.

Transmission Fluid

Check automatic transmission fluid with the engine running and warm, ideally after driving for 10-15 minutes.

Basic Maintenance Tasks

These simple tasks can significantly extend the life of your car:

Change Engine Oil and Filter

Regular oil changes are fundamental to engine health. While it might not save a huge amount of money, doing it yourself ensures the quality of the oil and allows you to inspect for other potential issues.

Replace Wiper Blades

Streaking wipers impair visibility. Replace them as needed, opting for quality brands for better performance and longevity.

Replacing wiper blades on a car

Replace Engine Air Filter

A clean air filter ensures optimal engine performance and fuel efficiency. Inspect and replace it regularly following manufacturer recommendations.

Inspecting a car air filter

Replace Cabin Air Filter

A clean cabin air filter improves air quality and HVAC efficiency. Replace it following manufacturer recommendations or as needed.

Replacing a cabin air filter

Replace Non-Headlight Bulbs

Replacing burnt-out license plate, side marker, and fog light bulbs is a straightforward task that can be done with basic tools.

Replace a Car Battery

Test your battery regularly and replace it when it fails to hold a charge. Most auto parts stores offer free battery recycling.

Connecting jumper cables to a car battery

Re-Torque Your Wheels

After having your tires rotated or changed, re-torque the lug nuts to the manufacturer’s specified torque using a torque wrench after driving 50 miles. This ensures the wheels are securely fastened.

Using a torque wrench on a wheel lug nut

Intermediate Repairs

These repairs require a bit more skill and tools, but are still achievable for DIYers:

Change Transmission Fluid

Regular transmission fluid changes are vital for transmission health. Consult your owner’s manual for recommended intervals and procedures.

Fix a Flat Tire

Knowing how to plug a tire can save you time and money. However, if the damage is to the sidewall or the tire is severely damaged, professional repair is necessary.

Nail embedded in a car tire

Add Trailer Wiring

Installing a trailer wiring harness can be simplified with ready-made kits designed for specific vehicles.

Fix a Leaky Sunroof

Clogged sunroof drains can lead to leaks. Cleaning these drains with a shop vacuum or speedometer cable can often resolve the issue.

Change Power Steering Fluid

Consult your owner’s manual for recommendations on changing power steering fluid. Use the correct type of fluid and avoid using stop-leak additives.

Swap Out Brake Fluid

Test brake fluid regularly and perform a fluid swap to maintain its effectiveness. Use a fresh turkey baster or similar tool to avoid contamination.

Replace a Serpentine Belt

Replacing a serpentine belt is relatively easy with automatic belt tensioners. Consult a diagram for proper routing.

Change Your Spark Plugs

Replacing spark plugs can improve engine performance and fuel efficiency. Use the correct type of spark plug and gap them properly.

Replacing spark plugs in a car engine

Recharge Your Car’s Air Conditioner

Using an AC recharge kit, you can often restore cooling performance. Follow the kit instructions carefully.

Using an AC recharge kit on a car

Find and Replace a Blown Fuse

Identifying and replacing a blown fuse is a quick and inexpensive fix for various electrical issues.

Replace a Broken Wheel Stud

While more challenging, replacing a broken wheel stud is possible with the right tools and careful execution.

Clean Your Air/Fuel Intake System

Using a fuel system cleaning kit can remove carbon buildup and improve engine performance.

Fix Your Headlights

Cleaning cloudy headlights or fixing dim headlights can improve visibility and safety.

Replace Headlights

Replacing headlight bulbs is relatively simple once you’ve selected the correct replacement bulbs.

Fix a Leaking Valve Cover Gasket

Replacing a valve cover gasket can address oil leaks and prevent further engine damage.

Applying sealant to a valve cover gasket

Car Detailing and Appearance

These tasks enhance your car’s appearance and protect its interior:

Buff Out a Paint Scratch

Minor scratches can be removed with buffing compound and a random orbital sander with a buffing pad.

Clean and Condition the Seats

Regular cleaning and conditioning keep leather or vinyl seats in good condition and prevent cracking.

Cleaning car seats with a cloth

Clean the Carpet

Deep cleaning car carpets and upholstery removes dirt and stains, improving the overall interior appearance.

Cleaning car carpet with a machine

Remember the Recesses

Detailing includes cleaning all trim lines and crevices for a truly thorough cleaning.

Cleaning car interior crevices with a cloth

Wash the Windows

Thoroughly clean car windows, including the top edges, for optimal visibility.

Replace That Broken Antenna

Replacing a broken antenna can improve radio reception and enhance your car’s appearance.

Fix Tears in Leather and Vinyl

Repairing tears in leather and vinyl seats can save you money compared to professional upholstery repair.

Repairing a tear in a car seat

Add Graphite to Door Locks

Lubricating door locks with graphite powder prevents sticking and ensures smooth operation.

Applying graphite to a car door lock

Fix Small Dents and Door Dings

Minor dents and dings can be repaired with body filler and touch-up paint, restoring your car’s exterior.

Repairing a dent in a car with body filler

This comprehensive guide empowers you to tackle various car maintenance and repair tasks, saving you money and building your automotive skills. Always consult your owner’s manual for specific recommendations and safety procedures before starting any DIY project.