313+ 1978 Mazda Cosmo Parts

What do you want for your vehicle?

Start with an intent — drill into any category for exact-fit picks.

Keep it running

Maintenance & repair

NTK ABS Wheel Speed Sensor

Quality-Built Premium Ceramic Brake Pads w/ Hardware

BRAKE DISC (PR-EA/BX-2)

Mobil 1 V-Twin 20W-50 Synthetic Motorcycle Oil (1 Quart)

Browse all categories

Every category we carry for this vehicle, organized by system.

Maintenance & fluids

Brakes & suspension

Maintenance & Repair Jobs

Find all the parts you need for common jobs on your 1978 Mazda Cosmo.

Brake Job Oil Change Tune-Up Suspension Upgrade Wiper Replacement Battery Replacement

Frequently Asked Questions

Do these parts fit my 1978 Mazda Cosmo?

This page groups parts listed for the 1978 Mazda Cosmo. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.

What are the most popular parts for the 1978 Mazda Cosmo?

The most popular categories for the 1978 Mazda Cosmo include Wiring & Electrical, Oil & Fluids, Wheel Accessories, and Cooling System. Browse our full selection to find the exact parts you need for your vehicle.

How fast do 1978 Mazda Cosmo parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 1978 Mazda Cosmo parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.