09 Bmw 328I Specs – The Ultimate Guide To Performance And Maintenance
The 2009 BMW 328i stands as a high-water mark for the E90 generation, featuring the legendary N52 naturally aspirated inline-six engine. This guide breaks down the essential technical data, performance figures, and maintenance requirements to help owners and enthusiasts keep this classic driving machine in peak condition.
Finding the right balance between luxury and mechanical purity is a challenge for many modern cars, but the E90 chassis nails it. You likely appreciate the 2009 328i for its hydraulic steering and smooth power delivery, which are becoming harder to find. Understanding the 09 bmw 328i specs is the first step toward mastering your vehicle’s maintenance and unlocking its full potential on the road.
In this comprehensive breakdown, I will guide you through the engine data, drivetrain options, and chassis dimensions that define this model. We will also look at common failure points and DIY tips that only an experienced technician would know. Whether you are a weekend warrior or a dedicated daily driver, this information will save you time and money at the shop.
By the end of this article, you will have a clear blueprint for what makes this car tick and how to address its specific needs. We will cover everything from torque specs to fluid capacities, ensuring you have the confidence to tackle your next garage project. Let’s dive into the technical details of this iconic 3-Series.
The Heart of the Machine: N52 Engine Details
The 2009 328i is powered by the N52B30 engine, which many enthusiasts consider one of the most reliable straight-six engines BMW ever produced. Unlike its turbocharged sibling, the 335i, the 328i relies on natural aspiration to deliver a linear and predictable power band. This engine uses a magnesium-aluminum composite block to keep weight down and improve front-to-rear balance.
One of the standout features of this engine is the Valvetronic system, which eliminates the need for a traditional throttle body during normal operation. By varying the lift of the intake valves, the engine breathes more efficiently, resulting in better throttle response and improved fuel economy. It also utilizes Dual VANOS, which provides variable valve timing on both the intake and exhaust camshafts.
When you look at the 09 bmw 328i specs for power, the engine produces 230 horsepower at 6,500 RPM and 200 lb-ft of torque at 2,750 RPM. While these numbers might seem modest by modern standards, the way the power builds makes the car feel lively and engaging. It provides enough punch for highway merging while remaining smooth enough for a comfortable commute.
Engine Technical Specifications
- Displacement: 2,996 cc (3.0 Liters)
- Bore and Stroke: 85.0 mm x 88.0 mm
- Compression Ratio: 10.7:1
- Fuel Requirement: Premium Unleaded (91 Octane or higher)
- Oil Capacity: 6.5 Liters (6.9 Quarts)
Always use a high-quality synthetic oil that meets the BMW Longlife-01 (LL-01) specification. I recommend a 5W-30 or 0W-40 weight depending on your climate. Changing your oil every 5,000 to 7,500 miles is much safer for the engine than the 15,000-mile interval BMW originally suggested.
Deep Dive into the 09 bmw 328i specs
To truly understand how this car performs, we need to look at the raw data across all body styles. The 2009 model year was part of the “LCI” or Life Cycle Impulse, which brought refreshed styling to the sedan and wagon. These updates included revised headlights, taillights, and a more modern interior interface.
The 328i was offered in four distinct body styles: the E90 Sedan, the E91 Touring (Wagon), the E92 Coupe, and the E93 Convertible. While they share the same engine, their weight and dimensions vary slightly, affecting their 0-60 mph times and handling characteristics. The sedan remains the most popular choice for its balance of utility and performance.
When reviewing the 09 bmw 328i specs for weight, the sedan starts at approximately 3,362 lbs for the rear-wheel-drive manual version. If you opt for the xDrive all-wheel-drive system or the automatic transmission, that weight increases. The E93 convertible is the heaviest of the bunch due to the complex retractable hardtop mechanism, weighing in at nearly 3,800 lbs.
Performance and Acceleration
- 0-60 MPH (Manual): Approximately 6.3 seconds
- 0-60 MPH (Automatic): Approximately 6.9 seconds
- Top Speed: 130 mph (electronically limited) or 150 mph with Sport Package
- Braking Distance (60-0 mph): ~110 feet
The braking performance is excellent thanks to 11.8-inch ventilated discs in the front and 11.8-inch discs in the rear. If you track your car or drive aggressively on mountain roads, consider upgrading to high-performance pads and DOT 4 brake fluid. This will prevent brake fade and keep your pedal feel firm during spirited driving.
Transmission and Drivetrain Configurations
BMW offered two primary transmission choices for the 2009 328i: a 6-speed manual and a 6-speed automatic. The manual transmission, sourced from Getrag, is prized for its precise shifts and mechanical feel. It allows the driver to make the most of the N52’s power band, especially in the higher RPM ranges.
The 6-speed automatic in the 328i is actually a GM-sourced 6L45 unit, rather than the ZF units found in the 335i. While generally reliable, it is slightly slower to shift than the ZF. If you own an automatic, I highly recommend a transmission fluid and filter service every 60,000 miles to ensure longevity, despite BMW’s “lifetime fill” claims.
You also had the choice between traditional rear-wheel drive (RWD) and the xDrive all-wheel-drive (AWD) system. The RWD models offer the purest steering feel and a slightly lower ride height. The xDrive models provide excellent traction in snow and rain but add complexity and weight to the front suspension and steering components.
Drivetrain Component Guide
- Manual Gearbox: Getrag GS6-17BG
- Automatic Gearbox: GM 6L45
- Final Drive Ratio (Manual): 3.23:1
- Final Drive Ratio (Auto): 3.73:1
- Differential Fluid: 75W-90 Synthetic Gear Oil
If you notice a humming sound from the rear of the car, check your differential fluid levels. A small leak at the output shaft seals is a common issue on higher-mileage E90s. Replacing these seals early can prevent a much more expensive differential failure down the road.
Chassis, Suspension, and Steering Specs
The E90 chassis is renowned for its 50/50 weight distribution, which is a hallmark of the BMW driving experience. The front suspension uses a double-pivot strut design, while the rear utilizes a five-link independent setup. This combination allows for sharp turn-in while maintaining stability over mid-corner bumps.
One of the most important 09 bmw 328i specs to consider is the steering rack. The 2009 328i uses a hydraulic power steering system, which provides significantly more feedback than the electric systems found in newer BMWs. Keeping the power steering fluid clean is vital; most E90s require Pentosin CHF 11S fluid, not standard ATF.
If your car has the “Sport Package” (Option Code ZSP), it features a lower, stiffer suspension and larger wheels. This package transforms the car’s handling but can make the ride feel slightly harsh on broken pavement. Many owners choose to replace the factory run-flat tires with standard performance tires to improve ride quality and grip.
Wheel and Tire Fitment
The standard wheel size for the 328i was 16 inches, but 17-inch and 18-inch options were very common. If you are looking for new tires, here are the factory sizes to keep in mind:
- Standard: 205/55R16
- Sport Package (Front): 225/45R17
- Sport Package (Rear): 255/40R17
- 18-inch Upgrade (Front): 225/40R18
- 18-inch Upgrade (Rear): 255/35R18
Always check your alignment after replacing suspension components like control arms or bushings. The E90 is very sensitive to toe settings. Incorrect alignment will lead to rapid tire wear and a car that feels “darty” or unstable at highway speeds.
Common Maintenance and Reliability Issues
While the N52 engine is robust, there are specific areas where the 09 bmw 328i specs won’t tell the whole story. Like most European cars, the cooling system and gaskets are the primary weak points. Being proactive with these repairs can prevent you from being stranded on the side of the road.
The most notorious issue is the electric water pump. Unlike traditional belt-driven pumps, the electric pump can fail without warning. Most technicians recommend replacing the water pump and the thermostat every 80,000 to 100,000 miles as preventative maintenance. If your car overheats, pull over immediately to avoid warping the aluminum cylinder head.
Oil leaks are another common headache. The Oil Filter Housing Gasket (OFHG) and the Valve Cover Gasket (VCG) are the usual suspects. A leaking OFHG is particularly dangerous because oil can drip onto the serpentine belt. If the belt slips off or shreds, it can actually be sucked through the front main seal and into the engine, causing catastrophic failure.
Critical Maintenance Checklist
- Serpentine Belt: Inspect for oil contamination every 10,000 miles.
- VANOS Solenoids: Clean or replace if you experience a rough idle or “limp mode.”
- Spark Plugs: Replace every 60,000 miles using NGK or Bosch equivalents.
- Cabin Air Filter: Replace annually to keep the HVAC system smelling fresh.
- Coolant Flush: Use BMW Blue Coolant mixed 50/50 with distilled water every 3 years.
Keep an eye on your DISA valves if your 328i has the three-stage intake manifold (common on the 330i or modified 328is). The plastic flaps can break and get sucked into the engine. If you hear a rattling sound from the intake manifold, address it immediately to save your engine.
Interior Technology and Dimensions
The interior of the 2009 328i is a mix of high-quality materials and functional design. For the 2009 model year, BMW updated the iDrive system to the “CIC” version, which is much faster and more user-friendly than the earlier “CCC” units. It features a high-resolution screen and a built-in hard drive for music storage.
In terms of space, the E90 sedan offers 09 bmw 328i specs that are competitive for its class. You get 38.5 inches of front headroom and 41.5 inches of front legroom. The trunk provides 12 cubic feet of cargo space, which is enough for a couple of suitcases or a grocery run. If you need more utility, the E91 wagon is the superior choice.
Safety was also a priority for this generation. The car comes standard with front, side, and curtain airbags, as well as Electronic Stability Control (DSC). The 2009 model performed well in crash tests, earning high marks for side-impact protection. It is a solid, heavy-feeling car that inspires confidence on the highway.
Interior Dimensions and Capacities
- Seating Capacity: 5 Passengers
- Shoulder Room (Front): 55.4 inches
- Legroom (Rear): 34.6 inches
- Fuel Tank Capacity: 16.1 Gallons
- Curb Weight: 3,362 – 3,814 lbs (depending on configuration)
Check the Footwell Module (FRM) if your power windows or lights start acting strangely. These modules are known to fail, especially after a battery jump-start or a deep discharge. If you need to replace your battery, ensure you “register” it using a scan tool so the alternator charges the new battery correctly.
Frequently Asked Questions About 09 bmw 328i specs
What is the fuel economy of the 2009 BMW 328i?
The RWD sedan typically achieves 18 MPG in the city and 28 MPG on the highway. Choosing xDrive or the automatic transmission may slightly lower these numbers. Always use premium fuel to maintain these figures and prevent engine knocking.
Is the 2009 BMW 328i expensive to maintain?
Maintenance is higher than a typical economy car, but the 328i is generally the most affordable E90 to own. Because it lacks turbochargers and high-pressure fuel injectors, it avoids the most expensive repairs associated with the 335i. DIYing your oil changes and brakes will save you thousands.
Does the 2009 328i have a timing belt or chain?
The N52 engine uses a timing chain, which is designed to last the life of the engine. Unlike cars with timing belts, you do not need to replace it as part of regular maintenance. However, ensure you change your oil regularly to keep the chain guides lubricated and prevent wear.
Can I use regular gas in my 328i?
While the car can run on lower octane fuel in an emergency, it is not recommended. The engine’s computer will retard the ignition timing to prevent damage, which reduces power and fuel efficiency. For the best performance according to the 09 bmw 328i specs, stick to 91 octane or higher.
How long will a 2009 BMW 328i last?
With proper maintenance, these cars easily surpass 200,000 miles. The N52 engine block itself is incredibly durable. The key to longevity is staying on top of cooling system refreshes and oil leak repairs before they cause secondary damage to other components.
Final Thoughts for the DIY Mechanic
Owning a 2009 BMW 328i is a rewarding experience for anyone who loves to drive. By understanding the 09 bmw 328i specs, you are better equipped to handle the unique quirks of the E90 platform. This car provides a level of feedback and mechanical soul that is increasingly rare in the automotive world.
If you are planning to work on the car yourself, invest in a quality BMW-specific scan tool like an Enthusiast-level Foxwell or a Carly adapter. Being able to read hidden BMW codes will save you hours of guesswork when a warning light appears on the dash. Remember to always use the correct torque values for suspension and engine components.
Stay proactive with your maintenance, use high-quality parts, and don’t be afraid to get your hands dirty. The 328i is a fantastic platform for learning automotive repair while enjoying a world-class sports sedan. Keep your cooling system fresh, your oil clean, and your tires aired up. Stay safe and enjoy the drive!
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