Used 2018 Audi S5 Sportback for SaleNationwide

How much does the 2018 Audi S5 Sportback cost?

Prices have softened 14.64% compared to this time last year, making it a favourable time to shop this model year.

There are 57 listings available, which gives you a modest amount of inventory to compare before you decide.

Is the 2018 Audi S5 Sportback a good car?

Yes — owners give it 4.83/5, which points to strong overall satisfaction. Reviewers consistently praise its eye-catching design, impressive performance, and luxurious features, including comfortable massage chairs. The feedback also highlights its fast speed, which helps explain why it stands out to shoppers looking for a sporty premium hatchback. With 35.1% of listings marked as good or great deals, you have a meaningful chance to find a competitive offer.

Is the 2018 Audi S5 Sportback reliable?

Owners rate it 4.83/5, a strong signal of long-term satisfaction.

The owner feedback also points to a car that many drivers feel good about living with, with comments centred on dependable enjoyment, strong performance over time, and a premium feel that holds up in daily use. Some owners do mention minor startup hiccups and occasional lighting inconsistencies, so you should still inspect any used example carefully. For used buyers, that means the long-term ownership risk looks manageable, but a thorough pre-purchase check is still worthwhile.

Is now a good time to buy a used 2018 Audi S5 Sportback?

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

• Deal availability: 35.1% of listings are priced as good or great deals.
• Inventory: There are 57 listings available.
• Price trend: Prices have softened 14.64% compared with last year.

If you find a listing below $26,829 CAD, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 Audi S5 Sportback's resale value?

The current average of $27,047 CAD sits slightly below last year's $31,686 CAD.

That softer pricing can be helpful if you are buying now, but it also means a future seller may need to price competitively to stand out. If the market stays near this level, resale value should remain tied closely to condition, mileage, and how well the car has been maintained. Vehicles with strong owner satisfaction ratings, like this model year's 4.83/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 Audi S5 Sportback 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:

• 35.1% of listings are priced as good or great deals.
• Price trend: Prices have softened 14.64% compared with last year.
• Owners rate it 4.83/5 — a strong satisfaction signal.

The bottom line: If you want a used S5 Sportback with strong owner satisfaction and a softer price than a year ago, the 2018 is a sensible place to focus. If you are especially price-sensitive, keep watching listings and compare carefully, since the current market still rewards shoppers who are willing to wait for the right deal.

These recommendations are based on CarGurus' proprietary market data from September 11, 2026, CarGurus experts' opinions, and generative AI.