The BMW X5 (E70) 3.0si, produced from 2007 to 2008, represented a significant step forward for BMW’s burgeoning Sports Activity Vehicle (SAV) lineup. Positioned as a mid-range offering within the second-generation E70 X5 series, it bridged the gap between the entry-level 3.0xDrive and the high-performance X5 4.8i. This variant aimed to deliver a balance of performance, luxury, and relative fuel efficiency, appealing to buyers seeking a versatile and capable SUV with a distinctly BMW driving experience. The 3.0si was primarily marketed in North America and Europe, where demand for premium SUVs was rapidly increasing.
Technical Specifications
| Brand | BMW |
| Model | X5 |
| Generation | X5 (E70) |
| Type (Engine) | 3.0si (272 Hp) |
| Start of production | 2007 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 13.2 l/100 km (17.8 US mpg, 21.4 UK mpg, 7.6 km/l) |
| Fuel consumption (extra urban) | 8.2 l/100 km (28.7 US mpg, 34.4 UK mpg, 12.2 km/l) |
| Fuel consumption (combined) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.1 sec |
| Acceleration 0 – 62 mph | 8.1 sec |
| Acceleration 0 – 60 mph | 7.7 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.6 kg/Hp, 131.1 Hp/tonne |
| Weight-to-torque ratio | 6.6 kg/Nm, 151.8 Nm/tonne |
| Power | 272 Hp @ 6650 rpm |
| Power per litre | 90.8 Hp/l |
| Torque | 315 Nm @ 2750 rpm (232.33 lb.-ft. @ 2750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N52B30 |
| Engine displacement | 2996 cm3 (182.83 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 85 mm (3.35 in.) |
| Piston Stroke | 88 mm (3.46 in.) |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 10.6 l (11.2 US qt | 9.33 UK qt) |
| Kerb Weight | 2075 kg (4574.59 lbs.) |
| Max. weight | 2680 kg (5908.39 lbs.) |
| Max load | 605 kg (1333.8 lbs.) |
| Trunk (boot) space – minimum | 620 l (21.9 cu. ft.) |
| Fuel tank capacity | 85 l (22.45 US gal | 18.7 UK gal) |
| Length | 4854 mm (191.1 in.) |
| Width | 1933 mm (76.1 in.) |
| Height | 1739 mm (68.46 in.) |
| Wheelbase | 2933 mm (115.47 in.) |
| Front track | 1576 mm (62.05 in.) |
| Rear (Back) track | 1576 mm (62.05 in.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Coil spring |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 255/55 R18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
The heart of the X5 3.0si is the N52B30, a 3.0-liter inline-six engine. This engine is a naturally aspirated powerplant known for its smooth operation and responsive power delivery. The N52 featured Double-VANOS (variable valve timing on both intake and exhaust camshafts) and a magnesium alloy engine block, contributing to its relatively lightweight construction. Fuel delivery was handled by a multi-port fuel injection system, optimized for efficient combustion. The engine produced 272 horsepower at 6650 rpm and 315 Nm (232 lb-ft) of torque at 2750 rpm. Paired with the N52B30 was a six-speed automatic transmission, offering smooth shifts and a torque converter lockup function for improved fuel economy at cruising speeds. This transmission was specifically tuned to complement the engine’s characteristics, providing a balance between comfort and performance.
Driving Characteristics
The X5 3.0si offered a refined driving experience. While not as overtly sporty as the X5 4.8i, the 3.0si provided ample power for everyday driving and confident highway passing. The automatic transmission, while smooth, wasn’t particularly quick to downshift, meaning drivers sometimes needed to manually select a lower gear for more aggressive acceleration. The all-wheel-drive system (xDrive in BMW terminology) provided excellent traction in various weather conditions. The suspension, tuned for comfort, absorbed bumps effectively, but body roll was noticeable during spirited cornering. Compared to the 3.0si’s manual transmission counterpart, the automatic version sacrificed some responsiveness but gained in ease of use, making it a more appealing option for many buyers.
Equipment & Trim Levels
The X5 3.0si came standard with a generous array of features, including leather upholstery, power-adjustable front seats with memory function, automatic climate control, a premium sound system, and a sunroof. Optional extras included navigation, rear-seat entertainment, adaptive cruise control, and upgraded interior trim options. The exterior typically featured chrome accents and 18-inch alloy wheels. The interior design was typical BMW, emphasizing functionality and a driver-focused layout. The 3.0si trim level generally sat in the middle of the X5 range, offering a good balance of features and price.
Chassis & Braking
The E70 X5 utilized a robust chassis with a MacPherson strut front suspension and an integral-arm rear suspension. The 3.0si model featured ventilated disc brakes at all four corners, providing ample stopping power. Anti-lock brakes (ABS) and dynamic stability control (DSC) were standard safety features. The suspension was tuned to provide a comfortable ride without sacrificing handling. The 3.0si’s weight distribution was relatively balanced, contributing to its stable handling characteristics.
Market Reception & Comparison
The X5 3.0si was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and refined engine. However, some reviewers noted that the automatic transmission could feel sluggish at times, and the fuel economy wasn’t particularly impressive for a vehicle of its size. Compared to the X5 4.8i, the 3.0si offered a more affordable entry point into the X5 lineup, but it lacked the higher-performance engine and some of the more luxurious features. Against competitors like the Acura MDX and Volvo XC90, the X5 3.0si stood out with its more engaging driving dynamics and premium brand image.
Legacy
The N52B30 engine, found in the X5 3.0si, is generally considered a reliable powerplant when properly maintained. Common issues include oil leaks from the valve cover gasket and occasional problems with the cooling system. The six-speed automatic transmission is also relatively durable, but regular fluid changes are essential. Today, the E70 X5 3.0si represents a relatively affordable entry point into the BMW SUV world. Well-maintained examples can still provide years of reliable service, offering a blend of luxury, performance, and practicality. However, potential buyers should be aware of the potential maintenance costs associated with a vehicle of this age and complexity.
