1978 Dodge Diplomat(1,717 parts)

Vehicle Fitment Catalog

Choose your trim in My Garage to confirm exact fit.

Shop by Problem

Brakes squeaking?Brakes squeaking or grinding?AC not cold?AC not blowing cold?Check engine light?Check engine light on?

Other Dodge Diplomat Years

1979 1977 1980 1981 1982

1978 Dodge Diplomat(1,717 parts)

Vehicle Fitment Catalog

Choose your trim in My Garage to confirm exact fit.

Pick your trim for exact-fit parts

Brakes, exhaust, wheels, and suspension fit differently on different trims. Universal parts (mats, wipers, covers) show either way.

What do you want for your vehicle?

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

Keep it running

Maintenance & repair

Renewed Brake Master Cylinder

Quality-Built Premium Ceramic Brake Pads w/ Hardware

DFC 11-16 Scion Tc Rear Left Drilled & Slotted Geoperformance Rotor

Browse all categories

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

Maintenance & fluids

Brakes & suspension

Engine & performance

Interior

Wiper Blades(23)

Wheels & tires

Wheel Accessories(54)

Maintenance & Repair Jobs

Find all the parts you need for common jobs on your 1978 Dodge Diplomat.

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

Frequently Asked Questions

Do these parts fit my 1978 Dodge Diplomat?

This page groups parts listed for the 1978 Dodge Diplomat. 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 Dodge Diplomat?

The most popular categories for the 1978 Dodge Diplomat include Engine & Drivetrain, Wiring & Electrical, Cooling System, and Gaskets & Seals. Browse our full selection to find the exact parts you need for your vehicle.

How fast do 1978 Dodge Diplomat 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 Dodge Diplomat 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.