Used 2021 BMW 4 Series for Sale near Colorado

How much does the 2021 BMW 4 Series cost?

Prices have softened 5.94% compared to this time last year, making it a favorable time to shop this model year.

There are 620 listings available, which suggests you should have a workable selection to compare.

Is the 2021 BMW 4 Series a good car?

Yes — the 2021 BMW 4 Series earns a 5/5 user rating and a 6.83/10 expert rating. The standout strength is Technology at 9/10.

The 4 Series is aimed at you if you want a premium coupe or convertible that feels more distinctive than a conventional sedan-based alternative. Its styling is intentionally bold, and the model also leans on technology and driving character to stand apart.

The main trade-offs are a potentially polarizing design and a cramped back seat. It also skips a manual transmission, so if you want a more involved old-school setup, this won’t be the right fit.

The market shows 36.5% of listings as good or great deals, which gives you some room to shop carefully.

Is the 2021 BMW 4 Series reliable?

Owners rate it 5/5, a strong signal of long-term satisfaction.

The 4 Series is described as impressively refined and user friendly, which points to a polished ownership experience. Its powertrains are also presented as strong and efficient, with the six-cylinder version adding a 48-volt starter/generator for better fuel efficiency.

BMW’s standard warranty covers four years or 50,000 miles, with four years of free roadside assistance. For used buyers, the main long-term risk is that luxury-car ownership costs can rise quickly if maintenance or repairs are needed outside warranty coverage.

What should I look for when buying a used 2021 BMW 4 Series?

Accident-free inventory is solid at 78.1% — always verify the vehicle history report.

You should still check the history report carefully and prioritize a pre-purchase inspection, especially on cars with optional equipment or higher mileage. Focus on condition, feature operation, and signs of prior damage or heavy use.

Key things to evaluate:

• Trim level: The 4 Series is offered as a coupe or convertible, and the model’s appeal depends heavily on whether you value its distinctive styling and premium feel over practicality. The base setup includes standard LED headlights and taillights, front sport seats with 10-way power adjustment and driver’s memory, plus paddle shifters and a leather-wrapped sport steering wheel, but the back seat is cramped.
• Powertrain: The 430i uses a 2.0-liter turbocharged four-cylinder with 255 horsepower and 294 pound-feet of torque, while the M440i uses a 3.0-liter turbocharged inline-six with 382 horsepower and 369 pound-feet of torque. An eight-speed automatic is the only transmission.
• Safety package: Standard driver-assist features include lane-departure warning, forward-collision warning, automatic emergency braking, blind-spot monitoring, rear cross-traffic alert, automatic high beams, and speed-limit information. Adaptive cruise control requires the Driving Assistance Professional Package.
• Infotainment: The standard iDrive 7 system includes an 8.8-inch touchscreen, while the available Live Cockpit Professional setup adds a 10.25-inch central touchscreen and a 12.3-inch digital instrument cluster. Wireless Apple CarPlay and Android Auto are standard, and wireless phone charging is available.
• Fuel efficiency: The rear-wheel-drive 430i is rated at 29 mpg combined, and the 430i xDrive is rated at 27 mpg combined. The M440i adds a 48-volt starter/generator for better fuel efficiency.

Which 2021 BMW 4 Series trim should I buy?

The 2021 BMW 4 Series is offered in 2 trim levels: 430i and M440i.

Here's the short version:

• 430i: This is the better-value choice if you want the core 4 Series experience without paying for the six-cylinder upgrade. You still get the model’s standout styling, strong technology, and the standard equipment that makes the cabin feel upscale.
• M440i: Choose this if you want the stronger engine and the more performance-focused setup. It adds the six-cylinder powertrain and brings more of the performance hardware that helps the car feel quicker and more capable.

The safety package is not standard across every convenience feature, so make sure the car you’re considering has the driver-assistance equipment you want.

Is now a good time to buy a used 2021 BMW 4 Series?

This looks like a moderate market for selective buyers, so it’s worth shopping carefully and comparing listings.

• Deal availability: 36.5% of listings are priced as good or great deals.
• Inventory: There are 620 listings available.
• Price trend: Prices have softened 5.94% compared with last year.
• Clean inventory: 78.1% of listings are accident-free.

If you find a listing below $32,026, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 BMW 4 Series's resale value?

The current average of $32,708 sits slightly below last year's $34,775.

That decline suggests the market has already adjusted downward, which can help you as a buyer today but may limit upside if you plan to resell soon. If you buy at the right price, you reduce the chance of taking a bigger depreciation hit later.

Vehicles with strong owner satisfaction ratings, like this model year's 5/5, tend to retain buyer demand, which supports resale value over time.

Is the 2021 BMW 4 Series safe?

The 2021 BMW 4 Series earns a 6/10 safety score from our experts.

Standard driver-assistance features include lane-departure warning, forward-collision warning, automatic emergency braking, blind-spot monitoring, rear cross-traffic alert, automatic high beams, and speed-limit information. Adaptive cruise control is not standard and requires the Driving Assistance Professional Package, which also adds steering assist and stop-and-go capability.

Should I buy a 2021 BMW 4 Series 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:

• 36.5% of listings are priced as good or great deals.
• Accident-free inventory is solid at 78.1% — always verify the vehicle history report.
• Price trend: Prices have softened 5.94% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.
• The 2021 stands out for its bold styling, strong technology, and coupe-or-convertible variety.

Consider the 2022 if:

• At $35,677, the 2022 costs more than the current year's $32,708 average.
• It adds a five-door hatchback body style with easier rear-seat access.

The bottom line: If you want the best mix of price, style, and available inventory, the 2021 is the smarter starting point. If you’re willing to pay more for easier rear-seat access and extra everyday practicality, the 2022 is the better alternative.

These recommendations are based on CarGurus' proprietary market data from September 15, 2026, CarGurus experts' opinions, and generative AI.