2021 BMW 3 SERIES

If you've been searching for a 2021 BMW M340i for sale in Riverside, CA, this is the performance sedan that checks every box. ALSBOU MOTORS - RIVERSIDE has a stunning example of BMW's most compelling 3 Series variant in stock — a rear-wheel-drive M340i sedan with 70,460 miles and a 3.0L mild hybrid turbocharged inline-six that produces an exhilarating 382 horsepower and 369 lb-ft of torque. This is not an ordinary used BMW — this is a driver's car.

About This 2021 BMW M340i Sedan

The 2021 BMW M340i occupies a sweet spot in the luxury sport sedan market that few vehicles can match. With 70,460 miles on the odometer, this car is well past its break-in period and entering the most enjoyable phase of its ownership life — mechanically sound, fully sorted, and carrying none of the depreciation that hit it when it left the showroom. At this mileage, a properly maintained M340i still has years of spirited driving ahead of it, making this an exceptional value for buyers who know what they're looking at.

2021 BMW M340i Performance and Engine

The Heart of the M340i Experience

Under the hood sits BMW's legendary B58 3.0L turbocharged inline-six engine, enhanced here with a 48-volt mild hybrid system that improves throttle response and efficiency without sacrificing the raw character enthusiasts love. The result is 382 horsepower and 369 lb-ft of torque delivered through an eight-speed automatic transmission to the rear wheels — a classic BMW configuration that delivers the kind of balanced, rear-driven dynamics that defines the brand.

The mild hybrid system isn't just a marketing add-on. It provides a torque assist during acceleration, helping the M340i launch from 0-60 mph in around 4.4 seconds while also improving fuel economy compared to a traditional turbocharged engine. In rear-wheel-drive configuration, the M340i rewards skilled drivers with genuine feedback and adjustability — something the all-wheel-drive xDrive version simply can't replicate in the same way.

BMW M340i Features and Interior

A Cabin Built for the Driver

The M340i trim elevates the 3 Series interior with M-specific sport seats, an M Sport steering wheel, and aluminum trim accents that signal this car's performance intent the moment you sit down. BMW's iDrive infotainment system comes standard with a central touchscreen, Apple CarPlay, and a premium audio experience — technology that still feels modern and intuitive in 2024.

Adaptive M suspension, M Sport brakes, and larger-diameter wheels come as part of the M340i package, giving this sedan a planted, confident road feel that distinguishes it from any standard 330i. Dual-zone automatic climate control, heated front seats, and a power-adjustable driver's seat round out the comfort features that make long highway stretches on the 91 or 10 Freeway genuinely enjoyable.

BMW M340i Reliability and Ownership

What M340i Owners Actually Experience

The B58 engine found in the M340i has earned a strong reputation in BMW enthusiast communities for durability and tunability. Unlike some turbocharged BMW engines from earlier generations, the B58 has proven to be a significantly more reliable unit when maintained properly with quality synthetic oil on schedule — typically every 10,000 miles or as indicated by the service monitor.

Common ownership advice for any used M340i includes verifying oil change history, checking for any open recalls, and inspecting the cooling system components. At 70,460 miles, this vehicle is likely past its original BMW maintenance program but should have plenty of life remaining on all major mechanical components when cared for correctly. Buyers should feel confident in this platform — it's the same basic architecture BMW uses across its performance lineup and has been well-regarded by automotive journalists and long-term owners alike.

Why Buy From ALSBOU MOTORS - RIVERSIDE in Riverside, CA

ALSBOU MOTORS - RIVERSIDE is located in Riverside, in Riverside County — one of Southern California's most active and competitive used vehicle markets. That means the team here understands what local buyers expect: transparent pricing, vehicles that are accurately represented, and a purchase experience that doesn't waste your time. Whether you're trading in a vehicle or coming in clean, ALSBOU MOTORS works to make the transaction straightforward for buyers throughout the Inland Empire region.

Buying a used BMW from an independent dealer with real inventory knowledge means you're dealing with people who chose this specific car for a reason — not a massive corporate lot where cars are just numbers.

Financing a Used BMW M340i Near Riverside

Financing a used luxury sport sedan like the 2021 BMW M340i near Riverside, CA is more accessible than many buyers expect. ALSBOU MOTORS - RIVERSIDE works with a network of lenders to find competitive rates for buyers across a wide range of credit profiles — from excellent credit buyers looking for low APR options to those rebuilding after financial setbacks.

With the M340i's strong residual value and buyer demand, lenders view this as a stable asset to finance. Bring your pre-approval or start fresh — either way, the finance team at ALSBOU MOTORS serving Riverside County will work to get you behind the wheel. Call 951-249-7905 to discuss financing options before you even visit.

Frequently Asked Questions

Is the 2021 BMW M340i a good used car to buy?

Yes — the 2021 BMW M340i is widely considered one of the best performance sedans in its class. With the B58 turbocharged inline-six engine producing 382 horsepower, rear-wheel-drive handling, and a premium interior, it competes directly with vehicles that cost significantly more on the new car market. At 70,460 miles, properly maintained examples are excellent used car buys.

How many miles is too many for a used BMW M340i?

The B58 engine in the M340i is known for longevity when properly maintained. Many owners report reliable operation well past 100,000 to 150,000 miles with regular synthetic oil changes and coolant service. At 70,460 miles, this example is far from high-mileage territory for this platform.

What does the M340i trim include over a standard 330i?

The M340i steps up with a significantly more powerful 3.0L turbocharged inline-six (382 hp vs. 255 hp in the 330i), M Sport adaptive suspension, larger M Sport brakes, M-specific interior trim, an M Sport steering wheel, and a sportier exterior appearance package — making it a meaningfully different car, not just a badge upgrade.

Is the BMW M340i mild hybrid fully electric or gas-powered?

The M340i's mild hybrid system is a 48-volt assist system — it is not a plug-in hybrid and does not run on electricity alone. It uses a small integrated motor-generator to reduce turbo lag, assist during acceleration, and enable mild engine-off coasting to improve fuel efficiency. You fuel it with regular premium gasoline only.

What is the fuel economy of the 2021 BMW M340i?

The 2021 BMW M340i is EPA-rated at approximately 22 mpg city and 30 mpg highway in rear-wheel-drive configuration. The mild hybrid system contributes to those figures, making it reasonably efficient for a 382-horsepower sport sedan.

Serving Riverside and Surrounding Areas

ALSBOU MOTORS - RIVERSIDE is proud to serve buyers throughout Riverside County and the broader Inland Empire. Whether you're coming in from Corona, Moreno Valley, Perris, Norco, Jurupa Valley, or making the drive from the Coachella Valley or the San Bernardino area, this M340i is worth the trip. Riverside sits at the crossroads of the 91, 215, and 60 freeways, making ALSBOU MOTORS easily accessible from nearly every direction in Southern California.

Luxury sport sedan shoppers from the High Desert, Temecula, and Murrieta areas will also find the drive to Riverside straightforward — and the savings on a properly priced pre-owned BMW M340i make it more than worthwhile.

Contact ALSBOU MOTORS - RIVERSIDE Today

This 2021 BMW M340i M340i won't sit on the lot for long — rear-wheel-drive performance sedans with the B58 engine at this mileage and price point attract serious buyers fast. If you're ready to experience one of the best driving sedans available in the Riverside, CA market, contact ALSBOU MOTORS - RIVERSIDE today.

Call us at 951-249-7905 to confirm availability, ask questions about the vehicle history, or schedule your test drive. Come see us in Riverside, in Riverside County, and find out why buyers throughout the Inland Empire trust ALSBOU MOTORS for their next vehicle.