How much does the 2018 Audi S4 cost?

Prices have softened 5.60% compared to this time last year, making it a favorable time to shop this model year.

There are 132 listings available, which suggests you have some room to compare prices and condition across the market.

If you find a listing below $22,844.92, that's toward the low end of the year-round range and worth acting on quickly.

Is the 2018 Audi S4 a good car?

Yes — the 2018 Audi S4 earns a 4.67/5 user rating, which points to strong owner satisfaction. The overview backs that up with a clear value proposition: you get a quick performance sedan with strong straight-line speed, standard all-wheel drive, and a cabin that feels modern thanks to Virtual Cockpit and Google navigation. It also fits well if you want a luxury sedan that is fast and easy to live with rather than one that prioritizes maximum track sharpness. 29.5% of listings are priced as good or great deals, so there are still some attractive opportunities if you shop carefully.

Is the 2018 Audi S4 reliable?

Owners rate it 4.67/5, a strong signal of long-term satisfaction. The overview describes the 2018 S4 as a refined, well-equipped performance sedan with standard all-wheel drive and a smooth ride, which supports the case for everyday usability. At the same time, its performance-luxury setup means you should expect used-car ownership to hinge on maintenance history and overall condition, especially if the car has seen hard use.

What should I look for when buying a used 2018 Audi S4?

At 73.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and confirm whether any reported damage was minor or structural. Put inspection priority on body condition, panel alignment, and signs of inconsistent repairs, then make sure the car drives smoothly and feels mechanically tight. Because this is a performance sedan, condition matters as much as mileage, so a clean, well-documented example is the safer buy.

Is now a good time to buy a used 2018 Audi S4?

This looks like a moderate, selective buyer’s market, where careful shoppers can still find value without expecting deep discounts across the board.

• Deal availability: 29.5% of listings are priced as good or great deals.
• Inventory: There are 132 listings available.
• Price trend: Prices have softened 5.60% compared with last year.
• Clean inventory: 73.5% of listings are accident-free.

If you find a listing below $22,844.92, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 Audi S4's resale value?

The current average of $23,626 sits slightly below last year's $25,029.

That price movement suggests the market has cooled a bit, which can help you buy more selectively now but may also limit upside if you plan to sell soon. For a future seller, the key is to preserve condition and documentation so your car stands out when it re-enters the market. A clean history and strong presentation matter more when prices have already softened.

Vehicles with strong owner satisfaction ratings, like this model year's 4.67/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 Audi S4 or consider a different year?

If you're weighing the 2018 against nearby model years, here's how to think about it:

Choose the 2018 if:

• 29.5% of listings are priced as good or great deals.
• At 73.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 5.60% compared with last year.
• Owners rate it 4.67/5 — a strong satisfaction signal.

The bottom line: If you want a quick, refined luxury sedan with standard all-wheel drive and a strong ownership reputation, the 2018 is the primary year to target. If your priority is stretching your budget, you can also compare nearby years and focus on the cleanest, best-documented example rather than chasing the newest badge alone.

These recommendations are based on CarGurus' proprietary market data from August 28, 2026, CarGurus experts' opinions, and generative AI.