Used 2018 BMW 3 Series for SaleNationwide

Compare 2018 BMW 3 Series Trims

The 2018 BMW 3 Series offers a range of trims from budget-friendly options to sportier models, catering to various preferences and driving needs.

• Starting at $12,605
• Best MPG/MPGe: 66 city / 78 hwy
• Most Popular: 330i Sedan RWD

Trim Overview

Prices updated weekly from CarGurus listings.

Quick Compare Table

Listing prices sourced from CarGurus — updated weekly. OEM specs from manufacturer data.

Missing data displayed as "—".

Trim Deep Dives

320i Sedan RWD — "Who It's For"

The 320i Sedan RWD is the pick for shoppers who want a luxury experience without the high price tag. It's the most budget-friendly option in the lineup.

• Avg. market price: $12,605 (updated weekly)
• MPG/MPGe: 24 city / 35 hwy
• Inventory: 320 listings
• View 320i Sedan RWD listings

320i xDrive Sedan AWD — "Who It's For"

The 320i xDrive Sedan AWD is the pick for shoppers who want all-wheel drive without paying a premium. It offers solid features at a competitive price.

• Avg. market price: $13,701 (updated weekly)
• MPG/MPGe: 23 city / 34 hwy
• Inventory: 343 listings
• View 320i xDrive Sedan AWD listings

330i Sedan RWD — "Who It's For"

The 330i Sedan RWD is the pick for shoppers who want a balance of performance and luxury without going overboard on price. It's the most popular trim for good reason.

• Avg. market price: $14,432 (updated weekly)
• MPG/MPGe: 24 city / 34 hwy
• Inventory: 619 listings
• View 330i Sedan RWD listings

330i xDrive Sedan AWD — "Who It's For"

The 330i xDrive Sedan AWD is the pick for shoppers who want sporty performance combined with all-weather capability. It’s a great choice for those in variable climates.

• Avg. market price: $16,513 (updated weekly)
• MPG/MPGe: 23 city / 33 hwy
• Inventory: 610 listings
• View 330i xDrive Sedan AWD listings

328d xDrive Sedan AWD — "Who It's For"

The 328d xDrive Sedan AWD is the pick for shoppers who want diesel efficiency with the benefits of all-wheel drive. It’s ideal for those who prioritize fuel economy.

• Avg. market price: $15,983 (updated weekly)
• MPG/MPGe: 30 city / 40 hwy
• Inventory: 40 listings — lower availability; may limit negotiating room
• View 328d xDrive Sedan AWD listings

330e iPerformance Sedan RWD — "Who It's For"

The 330e iPerformance Sedan RWD is the pick for shoppers who want a hybrid option with excellent fuel economy. It’s perfect for eco-conscious drivers.

• Avg. market price: $14,022 (updated weekly)
• MPG/MPGe: 66 city / 78 hwy
• Inventory: 83 listings — lower availability; may limit negotiating room
• View 330e iPerformance Sedan RWD listings

340i Sedan RWD — "Who It's For"

The 340i Sedan RWD is the pick for shoppers who want a powerful engine and luxury features without the highest price tag. It’s a great blend of performance and comfort.

• Avg. market price: $25,489 (updated weekly)
• MPG/MPGe: 21 city / 32 hwy
• Inventory: 60 listings — lower availability; may limit negotiating room
• View 340i Sedan RWD listings

340i xDrive Sedan AWD — "Who It's For"

The 340i xDrive Sedan AWD is the pick for shoppers who want top-tier performance and all-weather capability. It’s ideal for those who demand the best.

• Avg. market price: $28,384 (updated weekly)
• MPG/MPGe: 21 city / 31 hwy
• Inventory: 81 listings — lower availability; may limit negotiating room
• View 340i xDrive Sedan AWD listings

Trim Recommendations

Most Popular — 330i Sedan RWD

With 619 active listings, the 330i Sedan RWD is the clear volume leader in the lineup.

Browse 330i Sedan RWD listings

Best Budget Option — 320i Sedan RWD

At $12,605 avg market price — below the lineup median of $15,207 — it's the most accessible entry point.

Browse 320i Sedan RWD listings

Best for Fuel Economy — 330e iPerformance Sedan RWD

With an impressive MPG/MPGe of 66 city / 78 hwy, the 330e iPerformance Sedan RWD is the most fuel-efficient option.

Browse 330e iPerformance Sedan RWD listings

These recommendations are based on CarGurus' proprietary market data from September 24, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2018 BMW 3 Series cost?

Prices have softened 8.60% compared to this time last year, making it a favorable time to shop this model year.

There are 1,179 listings available, which gives you a solid pool of options to compare.

Is the 2018 BMW 3 Series a good car?

Yes — the 4.53/5 user rating points to strong owner satisfaction. Owners consistently praise the performance, smooth handling, and enjoyable ride quality, while the 2018 model’s compact luxury-sedan setup makes it a fit if you want a driver-focused car with a premium feel. The main tradeoffs are a cramped interior and higher ownership costs, so it works best if driving enjoyment matters more than maximum space or low running costs. With 35.4% of listings marked as good or great deals, there is still meaningful market opportunity if you shop carefully.

Is the 2018 BMW 3 Series reliable?

Owners rate it 4.53/5, a strong signal of long-term satisfaction.

The owner feedback also points to a dependable, trouble-free experience for many drivers, with praise centered on the car’s smooth handling and strong performance over time. That said, this is a complex luxury sedan, so long-term ownership risk is still tied to maintenance discipline and how well the car was cared for before you buy.

What should I look for when buying a used 2018 BMW 3 Series?

At 59.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should run a vehicle history report before you commit, then prioritize a pre-purchase inspection from a shop that knows luxury sedans. Focus on condition, maintenance records, and any signs of deferred upkeep, since the car’s complexity can make neglected examples more expensive to own.

Is now a good time to buy a used 2018 BMW 3 Series?

This looks like a moderate, selective buyer’s market, so you can be choosy if you’re patient.

• Deal availability: 35.4% of listings are priced as good or great deals.
• Inventory: There are 1,179 listings available.
• Price trend: Prices have softened 8.60% compared with last year.
• Clean inventory: 59.4% of listings are accident-free.

If you find a listing below $14,748, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 BMW 3 Series's resale value?

The current average of $14,971 sits slightly below last year's $16,379.

That softer pricing suggests the market has already adjusted downward, which can limit how much room there is for further depreciation if you buy well. For a future seller, the key will be condition and documentation, since well-kept examples should stand out more in a market where buyers can compare many listings. Strong maintenance history matters even more for a premium sedan like this, because shoppers tend to reward cars that look cared for and feel ready to drive.

Vehicles with strong owner satisfaction ratings, like this model year's 4.53/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2018 BMW 3 Series 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:

• 35.4% of listings are priced as good or great deals.
• At 59.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 8.60% compared with last year.
• Owners rate it 4.53/5 — a strong satisfaction signal.

Consider the 2019 if:

• At $20,469, the 2019 costs more than the current year's $14,971 average.
• It adds more modern software and a fresher digital feel.

The bottom line: If you want the better value play, the 2018 is the stronger starting point because pricing has eased and there are enough listings to shop selectively. If you’re willing to pay more for a newer-feeling cabin experience and updated software, the 2019 is the better secondary path.

These recommendations are based on CarGurus' proprietary market data from September 29, 2026, CarGurus experts' opinions, and generative AI.