Used 2021 Cadillac CT4 for SaleNationwide

How much does the 2021 Cadillac CT4 cost?

Prices have softened 6.59% compared to this time last year, making it a favorable time to shop this model year.

There are 313 listings available, which gives you a modest amount of inventory to compare before you buy.

Is the 2021 Cadillac CT4 a good car?

The 2021 Cadillac CT4 stands out as a compact luxury sedan with a distinctly American personality. Its front-engine, rear-wheel-drive layout and stiff chassis give it a true sport-sedan character, and its styling helps it look unlike most of the compact sedan field.

For 2021, it also gained wireless Apple CarPlay and Android Auto compatibility, and forward-collision warning and automatic emergency braking became standard. That makes it a stronger fit if you want a small luxury sedan with rear-drive dynamics, distinctive styling, and a mix of comfort, technology, and performance rather than a soft-riding commuter.

With 32.3% of listings marked as good or great deals, you have a meaningful number of opportunities to shop selectively.

Is the 2021 Cadillac CT4 reliable?

The 2021 Cadillac CT4 is presented as a compact luxury sedan with a stiff chassis, available all-wheel drive, and a range of turbocharged four-cylinder engines. It also adds standard forward-collision warning and automatic emergency braking for the model year, which strengthens its everyday appeal.

Its main tradeoffs are clear: the base model is described as sluggish, and the back seat is cramped. For long-term ownership, that means you should expect a car that can be rewarding to drive, but one where condition and maintenance history matter more if you want to avoid expensive surprises.

What should I look for when buying a used 2021 Cadillac CT4?

At 73.2% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should run a vehicle history report on any promising listing and prioritize cars with clean records and consistent maintenance. A pre-purchase inspection is especially worthwhile here, since you want to confirm that the car’s condition matches its sporty, premium positioning. Focus on body condition, signs of prior repair, and how well the interior and electronics have been cared for.

Is now a good time to buy a used 2021 Cadillac CT4?

This looks like a moderate, selective buyer’s market, so you can shop patiently and still find worthwhile options.

• Deal availability: 32.3% of listings are priced as good or great deals.
• Inventory: There are 313 listings available.
• Price trend: Prices have softened 6.59% compared with last year.
• Clean inventory: 73.2% of listings are accident-free.

If you find a listing below $24,893, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 Cadillac CT4's resale value?

The current average of $24,893 sits slightly below last year's $26,649.

That price movement suggests the CT4 has softened enough to improve your entry point as a buyer, but it also means future resale may depend heavily on how well you preserve the car’s condition. If you buy one now, a clean history and strong maintenance record should help protect value better than mileage alone.

Should I buy a 2021 Cadillac CT4 or consider a different year?

If you're weighing the 2021 against nearby model years, here's how to think about it:

Choose the 2021 if:

• 32.3% of listings are priced as good or great deals.
• At 73.2% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 6.59% compared with last year.

Consider the 2020 if:

• At $24,186, the 2020 costs less than the current year's $24,893 average.
• It offers multiple powertrain choices and a surprisingly low base price.

The bottom line: The 2021 is the better primary target if you want the newer model-year setup and a softer market price than last year. If you’re especially price-sensitive, the 2020 can make sense as a lower-cost alternative, but you should weigh its weaker value proposition against the savings.

How does the 2021 Cadillac CT4 compare to the 2021 BMW 3 Series?

These recommendations are based on CarGurus' proprietary market data from November 10, 2026, CarGurus experts' opinions, and generative AI.