Used 2021 Cadillac CT4 for Sale near Illinois

How much does the 2021 Cadillac CT4 cost?

Prices have softened 5.91% compared to this time last year, making it a favorable time to shop this model year.

There are 326 listings available, which gives you a meaningful amount of inventory to compare.

If you find a listing below $25,413.62, that's toward the low end of the year-round range and worth acting on quickly.

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 the design is unapologetically Cadillac, with a blocky shape and T-shaped headlights and taillights that separate it from softer-looking rivals. It also offers a choice of turbocharged 2.0-liter or 2.7-liter four-cylinder engines, which helps the CT4 cover both everyday commuting and more energetic driving.

For 2021, the CT4 gained wireless Apple CarPlay and Android Auto compatibility, and forward-collision warning and automatic emergency braking became standard. General Motors’ Super Cruise semi-automated driving tech also became available that year. The CT4’s appeal is strengthened by its available all-wheel drive, its sporty drive modes, and the fact that even the base model includes an 8-inch touchscreen, a digital instrument cluster, and Active Noise Cancellation. Buyers looking for a more performance-focused version will also appreciate that the CT4 lineup includes a V-Series model with a stronger engine, upgraded suspension hardware, and performance-oriented details.

The 31.0% share of good or great deals suggests you have a decent chance of finding a competitively priced example.

Is the 2021 Cadillac CT4 reliable?

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 the design is unapologetically Cadillac, with a blocky shape and T-shaped headlights and taillights that separate it from softer-looking rivals. It also offers a choice of turbocharged 2.0-liter or 2.7-liter four-cylinder engines, which helps the CT4 cover both everyday commuting and more energetic driving.

For 2021, the CT4 gained wireless Apple CarPlay and Android Auto compatibility, and forward-collision warning and automatic emergency braking became standard. General Motors’ Super Cruise semi-automated driving tech also became available that year. The CT4’s appeal is strengthened by its available all-wheel drive, its sporty drive modes, and the fact that even the base model includes an 8-inch touchscreen, a digital instrument cluster, and Active Noise Cancellation. Buyers looking for a more performance-focused version will also appreciate that the CT4 lineup includes a V-Series model with a stronger engine, upgraded suspension hardware, and performance-oriented details.

For used buyers, the main long-term ownership risk is that a sportier luxury sedan can be more expensive to keep in top shape if prior maintenance was inconsistent.

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

Accident-free inventory is solid at 77.6% — always verify the vehicle history report.

You should prioritize a history report first, then inspect the car for signs of prior damage, uneven wear, or poor repairs. Focus on overall condition, because a clean-looking listing can still hide issues that matter once you start driving it every day.

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

This looks like a moderate market where selective buyers can still find value if they shop carefully.

• Deal availability: 31.0% of listings are priced as good or great deals.
• Inventory: There are 326 listings available.
• Price trend: Prices have softened 5.91% compared with last year.
• Clean inventory: 77.6% of listings are accident-free.

If you find a listing below $25,413.62, 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 $25,688 sits slightly below last year's $27,301.

That price movement suggests the CT4 has softened enough to help you buy more selectively today. If you plan to sell later, the current market gives you a useful benchmark for setting expectations, especially if your car has strong condition and clean history. A well-kept example should be easier to position than one with visible wear or a questionable record.

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:

• 31.0% of listings are priced as good or great deals.
• Accident-free inventory is solid at 77.6% — always verify the vehicle history report.
• Price trend: Prices have softened 5.91% compared with last year.

Consider the 2020 if:

• At $23,943, the 2020 costs less than the current year's $25,688 average.
• It offers a lower-cost entry point with a familiar athletic foundation.

The bottom line: The 2021 is the better primary choice if you want the stronger overall mix of pricing, inventory, and updated equipment. If your priority is spending less up front, the 2020 is the smarter secondary path, especially if you find one in strong condition and can live with the older setup.

These recommendations are based on CarGurus' proprietary market data from September 4, 2026, CarGurus experts' opinions, and generative AI.