BMW X5 G05 40i: Review, Test-Drive Impressions, and Owner Experience
Introduction
The BMW X5 G05 is the fourth generation of the Bavarian brand’s large SUV. It premiered in 2018, and in 2023 the model received its scheduled LCI update. The 40i version uses a 3.0-liter turbocharged inline-6 gasoline engine. Judged on the combined spec sheet, this variant strikes a balance between performance, comfort, and fuel economy. This overview is compiled from test drives, specialist automotive publications, and owner reviews.
Specifications
| Parameter | Value |
|---|---|
| Engine | 3.0 L, inline-6, gasoline, turbo |
| Power | 340 hp at 5,500–6,500 rpm |
| Torque | 332 lb-ft at 1,500–5,200 rpm |
| Transmission | 8-speed Steptronic automatic |
| Drivetrain | xDrive all-wheel drive |
| 0–60 mph (0–100 km/h) | 5.5 s |
| Top speed | 151 mph (electronically limited) |
| Claimed fuel economy | 25–27 mpg (8.7–9.4 L/100 km) |
| CO₂ emissions | 323–341 g/mi |
| Trunk | 23.0 cu ft (up to 65.7 cu ft, or 1,860 L, with the seats folded) |
| Curb weight | 4,707 lb |
The B58 Engine
The engine delivers 340 hp between 5,500 and 6,500 rpm, along with 332 lb-ft from 1,500 to 5,200 rpm. The technology is TwinPower Turbo. Throttle response is quick and linear, with torque in abundance from low revs. Driven gently, the unit runs smooth and quiet; under load it wakes up with a sporty soundtrack and confident pull. Forums rate the B58 as reliable—one of the strongest arguments in its favor when shopping for a used example.
Transmission and All-Wheel Drive
Torque flows through the 8-speed Steptronic automatic, and drive goes to all four wheels via xDrive. The sprint to 60 mph (0–100 km/h) takes 5.5 s, and top speed is electronically limited to 151 mph.
Chassis and Handling
The X5 G05 has a reputation for agility despite its imposing dimensions. AlVolante.it writes: “among large SUVs, the BMW X5 is one of the most nimble and pleasant to drive.” The optional air suspension delivers exceptional comfort and swallows road imperfections without effort. On the highway the car sits stable and flat; an owner on Quattroruote notes the precise steering and composure through long, gentle corners.
Interior and Electronics
The cabin is assembled from premium materials with precise panel fit. The iDrive infotainment with its dual curved display (from the 2023 facelift onward) works intuitively and responds without lag. A VWvortex user, after renting one, remarks that it “feels and even smells like luxury”—in his assessment, the G05, especially since the recent facelift, is now the best car in BMW’s lineup. The cabin is spacious and quiet, the seats are comfortable, and personalization options are plentiful.
Fuel Economy and CO₂
The claimed figure is 25–27 mpg (8.7–9.4 L/100 km), with CO₂ emissions of 323–341 g/mi. In real-world mixed driving the numbers run higher: 20–24 mpg (9.8–11.8 L/100 km). A gap between rated and actual figures is expected for a large gasoline SUV, but owners do notice how wide it is.
Data conflict. On the BMWpassion forum, one user claimed the 40i X5 “drinks fuel like crazy.” Other owners consider the real-world 20–24 mpg (9.8–11.8 L/100 km) acceptable for a vehicle of this size. Both opinions describe the same number: too much for some, normal for others. Separately, the manufacturer’s claimed 25–27 mpg (8.7–9.4 L/100 km) range and the 20–24 mpg (9.8–11.8 L/100 km) result from test drives don’t line up either.
Owner Opinions
Most owners report a positive experience. On Reddit, a user shopping for a 2020 X5 admitted: “I’ve never had a BMW, but I’ve always heard horror stories about their reliability in general.” The replies in the thread put those doubts to rest—on the strength of the B58’s reliability and the car’s overall quality. Another owner on Bimmerpost, who took delivery of an X5 40i LCI, noted the step up in comfort and technology compared with earlier models.
Data conflict. The initial fears about BMW reliability and the final conclusion that the B58 is solid coexist in the same discussion: the fears never materialized. It’s a rare case where the negativity comes from the brand’s reputation rather than from real statistics on the engine itself.
There’s criticism too. Fuel economy is the most frequently cited weak spot, especially by those who switched from a diesel. On BMWpassion the advice is: “I’d sooner try the 50e variant”—that’s the plug-in hybrid. Some owners point to the high price tag and above-average service costs. Most, though, feel the driving pleasure and comfort justify those expenses.
Comparison with Rivals
In the premium SUV segment, the X5 G05’s rivals are the Audi Q7, Mercedes GLE, and Porsche Cayenne.
- Audi Q7—the X5 wins on sportiness and design flair.
- Mercedes GLE—plusher, but less dynamic.
- Porsche Cayenne—more speed-focused, but pricier.
The X5’s position is the golden mean: it suits those who value comfort and those who love to drive.
Buying Advice
- Trim. The 40i makes sense if you’ll cover a lot of highway miles and want strong performance without stepping up to a V8. For mostly city use, the 50e plug-in hybrid is the better choice on fuel economy.
- Options. The air suspension package and the Driving Assistant Professional package bring a higher level of driver assistance.
- Maintenance. Stick strictly to BMW’s service schedule—that’s the precondition for long-term reliability.
- Used example. Check the service history and whether any recall campaigns remain open.
The Bottom Line
The BMW X5 G05 40i blends comfort, luxury trim, and lively dynamics, and its B58 engine closes out the reliability question that made many buyers wary of the brand to begin with. The main gripe is fuel economy: 20–24 mpg (9.8–11.8 L/100 km) in mixed driving against a rated 25–27 mpg (8.7–9.4 L/100 km). If your annual mileage happens on the highway and you don’t need a V8, the 40i is the sensible pick; for city driving, take a close look at the 50e hybrid.