If you're searching for a 2018 BMW X4 M40i for sale in San Diego, CA, this silver Sport Utility at Siry Motors is worth a serious look. With a twin-turbocharged inline-six under the hood, an eight-speed sport automatic, and BMW's xDrive all-wheel-drive system, this is one of the most driver-focused compact luxury SUVs of its era — and it's available right now at Siry Motors in San Diego. Stock #J1915 is your opportunity to get into a performance-tuned BMW at a used price point that makes a lot of sense.

About This 2018 BMW X4 M40i

The 2018 BMW X4 M40i occupies a unique space in the BMW lineup. It's not just a lifted wagon — it's a genuine performance vehicle wrapped in a sleek, fastback SUV body. At 95,809 miles, this vehicle has been driven, but that's entirely normal for a model year that's now several years old. The M40i was built to last, and with proper maintenance history, these engines and transmissions are well-known for going well past 150,000 miles without significant issues. The silver exterior gives it a clean, understated look that wears well in San Diego's coastal sun.

2018 BMW X4 M40i Performance and Engine

3.0-Liter Twin-Turbo Inline-Six

The heart of the M40i is BMW's B58 3.0-liter turbocharged inline-six — one of the most celebrated modern engines BMW has ever built. In M40i tune, this engine produces 355 horsepower and 369 lb-ft of torque. That's not SUV power — that's sports car power in a vehicle you can actually use every day.
 

8-Speed Sport Automatic with Manual Mode

Paired with ZF's excellent eight-speed sport automatic transmission, shifts are fast, smooth, and satisfying. Drivers can take control through steering wheel-mounted paddle shifters, making canyon runs on Angeles Crest or Palomar Mountain genuinely engaging. xDrive all-wheel drive keeps everything planted whether you're merging onto the 8 Freeway or dealing with the occasional wet coastal morning in San Diego.

BMW X4 M40i Features and Interior

M Sport-Tuned Cabin and Technology

The M40i trim steps up meaningfully over the base X4 xDrive28i. Inside, expect M Sport seats with enhanced bolstering, a leather-wrapped M steering wheel, and BMW's iDrive infotainment system. The M40i also receives specific suspension tuning, larger brakes, and M Sport exterior styling that sets it apart on the road. The driving position is confident and commanding without feeling like a traditional high-riding SUV — the X4's lower roofline keeps the feel sporty and cockpit-like.

BMW X4 M40i Reliability and Ownership

The 2018 BMW X4 M40i built on the platform improvements BMW had refined through years of 3 Series and 5 Series development. The B58 engine in the M40i is widely regarded as more robust and refined than the turbocharged four-cylinders found in lesser trims. Owners consistently report that with regular oil changes — BMW recommends full synthetic — and attention to cooling system components, these engines hold up extremely well over high mileage. The eight-speed transmission is equally durable. Common maintenance items to stay current on include spark plugs, the PCV system, and coolant hoses, all of which are predictable and reasonably priced when caught at routine intervals. At just under 96,000 miles, this X4 is comfortably within a range where a well-kept example still has a long ownership life ahead.

Why Buy From Siry Motors in San Diego, CA

Siry Motors has earned its reputation in San Diego by offering quality pre-owned vehicles with straightforward, no-pressure service. Located in San Diego, the dealership makes it easy for buyers from all across the region to come in, see the vehicle in person, and make an informed decision. Whether you're coming in from Mission Valley, La Jolla, Chula Vista, or Escondido, Siry Motors is a reasonable drive for a BMW of this caliber. The team is knowledgeable about the vehicles on the lot and genuinely interested in matching the right buyer to the right car — not just moving units.

Financing a Used BMW X4 Near San Diego

Used luxury vehicles like the BMW X4 M40i are more accessible than many buyers assume, especially with flexible used car financing. Siry Motors works with buyers across a range of credit profiles, from excellent to rebuilding. Whether you're putting money down or exploring low-down-payment options, the finance team can walk you through what makes sense for your monthly budget. San Diego buyers from National City, El Cajon, Santee, and surrounding communities have all found workable options here. Call 858-277-7300 to get a conversation started before you even come in.

Frequently Asked Questions

Is the 2018 BMW X4 M40i a good buy?

Yes — the M40i is widely considered the X4 trim worth buying. The B58 inline-six is one of BMW's best modern engines, performance is genuinely impressive, and the driving experience is closer to a sport sedan than a traditional SUV. For buyers who want luxury and performance without sacrificing utility, it's a strong choice.
 

How many miles is too many on a used BMW X4 M40i?

The B58 engine and ZF eight-speed transmission in the M40i are both built for high mileage when properly maintained. A well-serviced example at 95,000 miles is not a cause for concern. What matters most is maintenance history — oil change intervals, cooling system care, and whether the vehicle has been driven hard without attention. A pre-purchase inspection from an independent BMW specialist is always a smart move.
 

What does the M40i trim include over the standard X4?

The M40i upgrades include the 355-horsepower B58 engine, M Sport suspension tuning, larger brakes, M Sport exterior styling, M-specific interior trim, sport seats, and steering wheel paddle shifters. It's a meaningful performance package — not just a badge.
 

Does the 2018 BMW X4 have all-wheel drive?

Yes. The X4 M40i comes standard with BMW's xDrive all-wheel-drive system, which provides excellent traction in varied conditions. For San Diego drivers, this is a bonus both for spirited driving in the mountains and for the occasional rainy day on Southern California freeways.
 

What should I check when buying a used BMW X4 with high miles?

Focus on the cooling system, PCV valve and oil separator, spark plugs, and the condition of the tires and brakes. Pull a Carfax to verify service history. If possible, have an independent BMW technician do a pre-purchase inspection — it's a small cost that can save you significantly.

Serving San Diego and Surrounding Areas

Siry Motors proudly serves car shoppers from across the greater San Diego region. Whether you're coming from Clairemont, Pacific Beach, Point Loma, Kearny Mesa, or making the drive from further out in Poway, Lakeside, or San Marcos, the drive to see this BMW X4 M40i is worth it. South Bay buyers from Chula Vista, Bonita, and National City are equally welcome. San Diego is one of the best cities in the country to own a performance SUV — the weather, the roads, and the lifestyle all match what this car delivers.

Contact Siry Motors Today

Ready to get behind the wheel of this 2018 BMW X4 M40i? Call Siry Motors at 858-277-7300 to check availability, ask questions, or schedule a test drive. Stock #J1915 is ready for you on the lot in San Diego. This is the kind of vehicle that moves — don't wait too long to make your move.