Used Plymouth Reliant Buying Guide (and Dodge Aries K-Car)

The Plymouth Reliant and Dodge Aries are the same car, Chrysler's original K-car, sold for 1981 through 1989 as two-door and four-door sedans and wagons, and a good one today is simply the one with a solid front crossmember, a dry engine and a seller who has the title in hand. Mechanically they're about as simple as 1980s cars get. What kills them now is rust under the front end and owners who stopped caring years ago.

I read Hagerty's K-car history, Curbside Classic's production figures and an Autoweek look at the 1981 Aries ad, and ran NHTSA's recall data for both names on Oct. 20, 2026. What follows is what held up, plus what I couldn't confirm.

What you're buying

Hagerty says the Aries and Reliant went on sale in the fall of 1980 as 1981 models, with front-wheel drive, a transverse four-cylinder, a 100.4-inch wheelbase and a curb weight around 2,500 pounds. More than 307,000 were built the first year, and Motor Trend named them its 1981 Cars of the Year. The base engine was Chrysler's 2.2-liter four, rated at 84 hp, with a Mitsubishi 2.6 as the option. Later the Mitsubishi engine gave way to Chrysler's own 2.5. Autoweek covers how the cars were sold as the thing that would save the company, which is mostly how it went.

Curbside Classic's K-car chronology adds the details that matter to a shopper: a mild 1984 change that dropped the hood ornament, the only real facelift for 1985, the low-priced "America" series from 1988, and a police package from 1982 to 1987. Manual transmissions were four-speed through 1985 and five-speed only from 1986. Curbside's production table puts the Reliant at about 1.13 million and the Aries at about 973,000, so these were everywhere. Survivors aren't, and two-doors are getting genuinely hard to find.

The 2.2 is the engine to want. It stayed for the whole run and parts are still around. The Mitsubishi 2.6 has its own parts and its own quirks, and I'd only buy one with records. If you've already read our Plymouth Horizon guide, the 2.2 will be familiar, since it also went into the Horizon and Omni.

Recalls NHTSA lists

NHTSA returned the same campaigns for the Reliant and the Aries, year for year. The ones worth knowing:

• 89V052000 (1981-1983): the front suspension crossmember may corrode and fail at the lower control arm rear pivot mounts in places that use road salt. The remedy was reinforcement brackets. This is the big one.
• 81V021000 (1981) and 82V063000 (1982): brake fluid with too much water in it from the factory.
• 82V085000, 82V123000, 83V060000 (1983): rear brake lines that could chafe against the park brake cables, the exhaust or suspension brackets.
• 84V147000 (1984-1985): possible fuel leakage at the fuel reservoir seam and hose connections in the engine bay.
• 89V237000 (1989): a valve cover gasket that could move and leak oil.

NHTSA also lists 08E033000, a 2008 recall of Federal-Mogul aftermarket ball joints, which matters only if somebody installed those parts. You can see the 1981 list on NHTSA's recall API. Run the VIN through our Plymouth recall check by VIN or the Dodge one for an Aries, but don't count on a dealer having a record of brackets fitted in 1989.

What to check in person

Get under the front with a flashlight. Look where the lower control arms meet the crossmember and see if the reinforcement brackets are there on an early car. Push on the metal with a screwdriver, not hard, just enough to find out if it's solid. Then look at the strut towers, rocker panels, rear wheel arches and trunk floor. On a wagon, check the tailgate and the floor under the cargo mat.

Under the hood, check for oil at the valve cover and around the fuel lines and hoses. Old rubber is the problem now more than any design flaw. Drive it and check that the brakes pull straight and the automatic shifts without slipping. A carbureted K-car that idles rough and stalls can be a cheap fix or an endless one, and the seller rarely knows which.

History report and title

A report on a car this old will have gaps, and you're mainly looking for title brands, odometer problems and a sense of where it's lived. A Reliant that spent 30 years in the Rust Belt is a different car from one that lived in Arizona. Check the VIN on NMVTIS too. A lot of these change hands for a few hundred dollars on a bill of sale, and the title sometimes isn't in the seller's name. Don't take the car home until it is.

If you're open to a slightly newer Chrysler sedan, the car that replaced the Reliant is covered in our Plymouth Acclaim guide.

What it costs and what a report costs

I didn't find a value guide I'd trust for these, and most sell for very little. That's the point of a K-car, but cheap can still turn expensive when a rotten crossmember costs more than the car. CarVins is a licensed CARFAX and AutoCheck reseller and isn't connected to either company or to Stellantis. As of late October 2026, guest reports ran about $5.50, member reports about $4.50 and the bundle about $6.75, versus $39.99 to $44.99 retail. Look at the checkout total before you buy, since it's the price that counts.

Sources

• Hagerty: The letter car that saved Chrysler
• Curbside Classic: K-car production table (Curbside Classic's K-car family chronology, Jason Shafer, 2015, cited unlinked)
• Autoweek: 1981 Dodge Aries K ad
• NHTSA recalls: 1981 Plymouth Reliant (checked Oct. 20, 2026)