10 Car Parts You Should Always Buy Used (and 5 You Never Should)

Buying used car parts can save you a lot of money. But not all parts are safe to buy used. Some wear out quickly or are critical for safety.

This guide covers 10 parts you should always buy used and 5 you should buy new. We focus on genuine OEM parts from reputable sources like Auto128.

Parts You Should Always Buy Used

These parts are durable and often half the price of new ones. Used OEM parts are a smart choice.

1. Alternators and Starters

These electrical parts last a long time. A used OEM alternator can work perfectly for years.

Starters often fail due to wear, but many are rebuilt. Buying a used one from a wrecked car is a great deal.

2. Engine Control Modules (ECMs)

ECMs rarely fail. A used one from a matching vehicle works just like new.

Make sure the part number matches your car. Check the OEM code on the unit and your old one.

3. Doors, Hoods, and Trunk Lids

Body panels are expensive new. Used ones are much cheaper and fit exactly.

Look for the same color to save on painting. Ask the seller for photos of any dents or scratches.

4. Seats and Interior Trim

Interior parts like seats, door panels, and dash trim are easy to swap.

Choose the same color and material. Used seats are comfortable and affordable.

5. Window Regulators and Motors

Window regulators often break, but a used one can fix it fast. They are simple to install.

Match the part number for power or manual windows. Used motors are usually fine.

6. Steering Columns and Steering Wheels

Steering columns last the life of the car. A used one with the same features is a reliable choice.

Make sure it includes the airbag or module. Used steering wheels without wear are great finds.

7. Radiators and Cooling Fans

Radiators are often damaged in front-end collisions. A used one from a low-mileage car can save money.

Check for leaks and corrosion. Cooling fans are simple and durable.

8. Exhaust Manifolds and Catalytic Converters

Exhaust manifolds rarely crack. Used ones are cheap and easy to install.

Catalytic converters are expensive new. A used OEM converter is a good option if it's in good shape.

9. Suspension Arms and Steering Knuckles

Control arms and knuckles are strong metal parts. Used ones are safe if not bent.

Inspect the bushings and ball joints. Replace those if worn, but the arm itself is fine.

10. Engine Accessory Brackets and Pulleys

Metal brackets and pulleys do not wear out. Used ones are a bargain.

Check for cracks and smooth pulley bearings. These parts are easy to find and cheap.

Parts You Should Never Buy Used

Some parts are safety-critical or wear quickly. Always buy these new to avoid problems.

1. Brake Pads and Rotors

Brakes are the most important safety part. Used pads are worn and dangerous.

New rotors are essential for proper stopping. Never skimp on brakes.

2. Timing Belts and Chains

Timing belts can snap and destroy your engine. Used belts have unknown wear.

Always install a new timing belt kit. Chains last longer but a new one is safer.

3. Oil Pumps and Water Pumps

These pumps circulate vital fluids. A used pump can fail and cause engine damage.

Buy a new pump and replace the gasket. It is not worth the risk.

4. Airbags and Seatbelt Pretensioners

Airbags are explosive devices. Used ones may be defective or from a crashed car.

Buy new airbags from the dealer. Used seatbelt parts are also unsafe.

5. Oxygen Sensors and Mass Airflow Sensors

These sensors wear out over time. A used one may work but not accurately.

New sensors improve fuel economy and emissions. Spend the extra money.

How to Buy Used OEM Parts Safely

Follow these tips to get good used parts. Start by finding the right part for your car.

Use the OEM Code

Every genuine part has an OEM number. It is printed on the part or in your manual.

Search by this code on browse parts by brand to find exact matches. This ensures fitment.

Check the Vehicle Fitment

The same car model can have different parts by year or engine. Confirm the year, make, and model.

Ask the seller for the donor car's VIN. Compare it to your car's specs.

Understand How Auto128 Works

Auto128 connects you with professional dismantlers in Europe. They list used OEM parts.

Read about how Auto128 works to see the sourcing and shipping process. We handle customs.

Inspect the Part Before Buying

Ask for detailed photos from all angles. Look for cracks, rust, or wear.

If possible, ask about the donor car's mileage. Lower mileage usually means less wear.

Ask for a Warranty or Guarantee

Most sellers offer a short warranty. Some give a return guarantee if the part does not fit.

Check the frequently asked questions for details on guarantees and returns.

Shipping and Customs

Auto128 ships worldwide. The price usually includes delivery and customs handling.

You get a tracking number. Parts arrive in a week or two, depending on your country.

If you need a specific part, request a part and tell us the OEM code and your location. We find it for you.

Why Choose Used OEM Parts?

Used OEM parts are built to the same quality as new ones. They last as long as the car.

You save 50-80% compared to new dealer parts. The environment benefits too.

Read more on OEM (Original Equipment Manufacturer) to understand the quality difference.

Auto128 is a trusted source because we vet our dismantlers. Learn about Auto128 and our mission.