2008 BMW 328xi Maintenance Schedule

This page combines the available 2008 BMW 328xi maintenance schedule records for this model year. Use the sections below to compare service requirements, drivetrain-specific notes, oil change guidance, fluid checks, inspection intervals, and preventive maintenance tasks.

2008 BMW 328xi Complete Service & Maintenance Schedule

Key Takeaways

• The 2008 BMW 328xi (E90/E91) is powered by the N52KP 3.0-liter naturally aspirated inline-6 engine, producing 230 horsepower and 200 lb-ft of torque, and features BMW's xDrive all-wheel-drive system .
• BMW utilizes a Condition Based Service (CBS) system that uses sensors and algorithms to calculate individualized service intervals based on actual driving conditions, rather than a fixed schedule .
• Service requirements are stored in the remote control key and are read by your BMW service center to determine the precise maintenance needed for your vehicle .
• The engine requires BMW-approved synthetic oil (API SM or higher) with an oil capacity of 6.5 liters .
• Brake fluid is a time-dependent service requiring replacement every two years using DOT 4 specification fluid .
• The vehicle originally came with free scheduled maintenance for 48 months or 50,000 miles under BMW's Maintenance Program, which has long since expired .
• The Bentley BMW 3 Series (E90, E91, E92, E93) Service Manual is a comprehensive source of service information for the 2008 328xi .

Understanding BMW's Condition Based Service (CBS) System

The 2008 BMW 328xi is equipped with the Condition Based Service (CBS) system . Unlike conventional systems that rely on a rigid fixed schedule, this intelligent system uses sensors and special algorithms that take the driving conditions of your BMW into account to determine current and future service requirements . By letting you define a service and maintenance regimen that reflects your own individual requirements, the system builds the basis for trouble-free driving .

What CBS Monitors

On the Control Display, you can view the remaining times or distances for selected maintenance tasks :

• Engine oil service
• Brake pads: separately for front and rear
• Brake fluid
• Vehicle check
• Legally mandated inspections depending on local regulations

Service Data in the Remote Control

Your vehicle continuously stores service-requirement information in the remote control while you are driving . Your BMW Service Advisor can read this data from the remote control unit, and propose an optimized maintenance approach . Whenever you take your car in for servicing, you should hand your BMW Service Advisor the remote control unit that you last used .

Important: Make sure that the date is always set correctly; otherwise, the effectiveness of Condition Based Service CBS is not assured .

Original Factory Maintenance Coverage

The 2008 BMW 328xi was originally covered by BMW's free scheduled maintenance program for 48 months or 50,000 miles . This coverage has long since expired, making owner-funded maintenance the current owner's responsibility.

Authoritative Service Information

For comprehensive service information, the Bentley BMW 3 Series (E90, E91, E92, E93) Service Manual is a definitive source covering 2006-2011 models, including the 2008 328xi . It covers the N52KP engine used in the 328xi and provides step-by-step procedures and accurate specifications for all maintenance and repair operations .

Engine Oil Service

Oil Specifications

The 2008 328xi's N52 3.0L engine requires BMW-approved synthetic oil.

Oil Capacity: The N52 3.0L engine has an oil capacity of 6.5 liters .

Approved Specifications: BMW continuously approves specific oils after extensive testing . Only use approved BMW High Performance Synthetic Oil . If BMW High Performance Synthetic Oil is not available, you can add small quantities of other synthetic oils in between oil changes, using oils with the API SM specification or higher .

Oil Additives: Do not use oil additives as these may cause engine damage .

Oil Change Interval

CBS Guidance: The CBS system determines oil change intervals based on driving conditions . Oil should be added within the next 125 miles/200 km when a corresponding message is shown on the Control Display; otherwise, the engine could be damaged . If "Engine oil level too high" is displayed, too much oil will harm the engine—have the vehicle checked without delay .

Specialist Guidance: Oil change recommendations generally suggest intervals of 5,000 to 10,000 miles depending on engine type and driving conditions . Motor oil is the lifeblood of the engine—inadequate lubrication will cause parts to wear out faster and eventually lead to engine failure .

Oil Filter: The oil filter should always be replaced when the oil is changed .

Oil Change Cost

The average cost for an oil change on a 2008 BMW 328xi is approximately $260.71 (estimate) to $301.55–$413.44 (shop/dealer price), depending on the service provider .

Brake Fluid Service

Recommended Interval

BMW recommends brake fluid replacement every two years as a time-dependent service monitored by the CBS system . Brake fluid should be changed every time you service your brakes . Different brake systems require different brake fluid formulations; check your owner's manual for your vehicle's particular brake fluid specifications .

Fluid Specifications

The 2008 328xi uses brake fluid meeting DOT 4 specifications . Pentosin Super DOT 4 offers safety against vapor lock, excellent resistance to absorbing and retaining water, and provides superior corrosion resistance .

Service Rationale

Brake fluid is a hydraulic fluid specially formulated to withstand the extreme pressures and temperatures of your braking system . A brake system flush removes the existing fluid and moisture from the system and replaces it with new, clean fluid, ensuring proper brake system performance.

Spark Plug Service

The 2008 328xi requires 6 spark plugs .

OEM/Replacement Options

Specifications:

• Thread Diameter: 14 mm
• Thread Pitch: 1.25 mm
• Hex Size: 5/8" (16 mm)
• Torque Specs: Cast Iron: 15-29 lb. ft.; Aluminum: 8-14 lb. ft.

Additional Maintenance Information

Transmission Fluid

The 2008 328xi features Extended Service Interval for transmission fluid . The Bentley BMW 3 Series Service Manual covers ATF (automatic transmission fluid) change procedures for the 2008 328xi .

Vehicle Check

The CBS system triggers a Vehicle Check as part of its service cycle . This is a comprehensive inspection of the vehicle's general condition, safety, and operational readiness.

Cooling System and Radiator Service

The Bentley BMW 3 Series Service Manual covers cooling system and radiator service for the 2008 328xi .

Suspension and Brake Service

The manual also covers suspension repair procedures, brakes, steering, and ABS troubleshooting and repair .

Summary of Recommended Service Intervals

Frequently Asked Questions

How often should I change the oil on my 2008 BMW 328xi?

The CBS system determines the interval based on driving conditions . Oil and filter changes are generally recommended every 5,000 to 10,000 miles depending on engine type and driving conditions . The N52 3.0L engine has an oil capacity of 6.5 liters and requires BMW-approved synthetic oil (API SM or higher) . The oil filter should always be replaced when the oil is changed .

What type of engine oil does the 2008 BMW 328xi use?

The 2008 BMW 328xi requires BMW-approved synthetic oil. Only use approved BMW High Performance Synthetic Oil. If not available, you can add small quantities of other synthetic oils with the API SM specification or higher . Do not use oil additives as these may cause engine damage .

How does the BMW Condition Based Service (CBS) system work?

CBS uses sensors and special algorithms that take the driving conditions of your BMW into account to determine current and future service requirements . Service data is stored in the remote control key and can be read by your BMW service center . The system monitors engine oil, brake pads, brake fluid, and vehicle check requirements .

When should the brake fluid be replaced?

BMW recommends brake fluid replacement every two years as a time-dependent service . The 2008 328xi uses brake fluid meeting DOT 4 specifications . Brake fluid should be changed every time you service your brakes .

What spark plugs does the 2008 BMW 328xi use?

The 2008 BMW 328xi requires 6 spark plugs . Options include Bosch OE Specialty Platinum (gap .039"/1.0 mm), Denso Double Platinum (gap .043"/1.1 mm), and Denso Iridium Power (gap .043"/1.1 mm) .

What was the original warranty coverage on the 2008 BMW 328xi?

The 2008 BMW 328xi came with a 48-month/50,000-mile basic warranty, a 48-month/50,000-mile powertrain warranty, a 144-month/unlimited-mile rust warranty, and free scheduled maintenance for 48 months or 50,000 miles . These programs have long since expired for this model year, making owner-funded maintenance the current owner's responsibility.

Where can I find detailed service information for my 2008 BMW 328xi?

The Bentley BMW 3 Series (E90, E91, E92, E93) Service Manual is a comprehensive source of service information covering 2006-2011 models, including the 2008 328xi . It covers maintenance procedures from changing the ATF to replacing the cabin microfilter, and includes step-by-step procedures for cooling system, suspension, brakes, and electrical system service . The vehicle's Owner's Manual and Service and Warranty Information Booklet also provide maintenance details .

Does the 2008 BMW 328xi require transmission fluid service?

The 2008 BMW 328xi features an Extended Service Interval for transmission fluid . The Bentley BMW 3 Series Service Manual covers automatic transmission fluid (ATF) change procedures for the 2008 328xi . Consult a qualified BMW specialist for the appropriate service interval for your specific transmission.

2008 BMW 328xi Service Requirements & Maintenance Schedule

Key Takeaways

• The 2008 BMW 328xi is powered by the N52KP 3.0-liter naturally aspirated inline-6 engine, producing 230 horsepower and 200 lb-ft of torque, and features BMW's xDrive all-wheel-drive system .
• The vehicle was originally sold with BMW Ultimate Service, providing 4 years or 50,000 miles of free scheduled maintenance, which has long since expired .
• BMW uses a Condition Based Service (CBS) system that monitors driving conditions via sensors and calculates individualized service intervals, storing data in the remote control key for your BMW service center to read .
• The original maintenance program considered many fluids as "lifetime" fills; however, independent specialists strongly recommend servicing the automatic transmission, transfer case, and differentials at regular intervals for long-term reliability .
• Brake fluid is a time-dependent service item monitored by the CBS system.

Understanding BMW's Condition Based Service (CBS) System

The 2008 BMW 328xi is equipped with the Condition Based Service (CBS) system . Unlike conventional systems that rely solely on distance traveled, this intelligent system uses sensors and special algorithms that take the different driving conditions of your BMW into account to determine current and future service requirements .

What CBS Monitors

On the Control Display, you can view the remaining times or distances for selected maintenance tasks :

• Engine oil service
• Brake pads: separately for front and rear
• Brake fluid
• Vehicle check
• Legally mandated inspections depending on local regulations

Service Data in the Remote Control

Your vehicle continuously stores service-requirement information in the remote control while you are driving . Your BMW Service Advisor can read this data from the remote control unit and propose an optimized maintenance approach. Whenever you take your car in for servicing, you should hand your BMW Service Advisor the remote control unit that you last used .

Service and Warranty Documentation

For the most definitive service schedule for your specific vehicle, BMW directs owners to consult the Service and Warranty Information Booklet for US models . This booklet provides the factory-recommended service procedures and intervals that should be followed. BMW recommends that service and repair operations be performed at an authorized BMW center .

Factory Maintenance Coverage (Expired)

The 2008 BMW 328xi was originally covered by BMW's Ultimate Service program, which provided :

• Free scheduled maintenance for 48 months or 50,000 miles
• Basic warranty: 48 months or 50,000 miles
• Powertrain warranty: 48 months or 50,000 miles
• Rust warranty: 144 months (12 years), unlimited mileage

All factory maintenance coverage has long since expired for this model year. Regular owner-funded maintenance is now essential for preserving vehicle safety, value, and reliability.

Recommended Service Intervals

Engine Oil Service

CBS Guidance: The CBS system determines engine oil change intervals based on driving conditions, using an oil condition sensor and algorithms that monitor engine load, fuel consumption, and time since the last oil change. The original factory intervals could extend to approximately 10,000-15,000 miles depending on driving conditions.

Specialist Guidance: For this engine, many independent specialists recommend a more conservative approach. The N52 engine is known to be reliable when properly maintained, and regular oil changes are critical. A 5,000-7,500 mile interval is commonly recommended for older vehicles or those driven in city conditions .

Oil Specifications: The 2008 328xi requires BMW-approved synthetic oil. BMW recommends using oils meeting BMW LL-01 specifications. Approved oils include BMW High Performance Synthetic Oil and other BMW LL-01 approved synthetic oils.

The N52KP 3.0L engine has an oil capacity of approximately 6.5 liters.

Brake Fluid Service

CBS Guidance: The CBS system monitors brake fluid and indicates when replacement is due.

Specialist Guidance: Brake fluid is a time-dependent service, typically recommended for replacement every two years. Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. Moisture in the brake system can corrode internal components and lower the fluid's boiling point, leading to brake fade. Regular replacement is critical for maintaining braking performance.

Transmission Fluid Service (Automatic)

Factory Position: BMW's original maintenance program considered the automatic transmission fluid a "lifetime" fill for the 2008 328xi .

Specialist Guidance: The automatic transmission is one of the most neglected service areas on a car . Independent specialists strongly recommend changing the transmission fluid and filter at regular intervals. A common recommendation is to service the automatic transmission every 80,000-100,000 miles . A fluid and filter change helps prevent premature wear and ensures smooth shifting.

Transfer Case Fluid Service (xDrive-Specific)

The 2008 328xi features BMW's xDrive all-wheel-drive system , which includes a transfer case that distributes power between the front and rear axles.

Factory Position: BMW historically considered the transfer case fluid a "lifetime" fill.

Specialist Guidance: The transfer case is a critical and expensive component. The fluid can degrade over time, leading to bearing and gear noise . Specialists recommend replacing the transfer case fluid at regular intervals, typically every 80,000-100,000 miles as part of a comprehensive drivetrain service .

Differential Fluid Service

The 328xi has both front and rear differentials that require periodic fluid changes.

Specialist Guidance: In line with the transfer case service, specialists recommend replacing the front and rear differential fluids at regular intervals, typically every 80,000-100,000 miles . Use high-quality synthetic gear oil meeting BMW specifications.

Cooling System Service

Specialist Guidance: The water pump on the N52 engine is a known failure point. At higher mileages, ensure the water pump and thermostat have been inspected or replaced proactively . A cooling system service at regular intervals helps prevent overheating and engine damage.

Vehicle Check

CBS Guidance: The CBS system triggers a Vehicle Check as part of its service cycle. This is a comprehensive inspection of the vehicle's general condition, safety, and operational readiness. It includes multi-point inspections on fluid levels and other vehicle systems.

Recommended Maintenance Planning Summary

Frequently Asked Questions

How often should I change the oil on my 2008 BMW 328xi?

The CBS system determines the interval based on your driving conditions. Many independent specialists recommend changing synthetic motor oil every 5,000–7,500 miles for optimal engine health . The N52KP 3.0L engine requires BMW-approved synthetic oil meeting BMW LL-01 specifications and has an approximate capacity of 6.5 liters.

How does the BMW Condition Based Service (CBS) system work?

CBS uses sensors and special algorithms that take the different driving conditions of your BMW into account to determine current and future service requirements . Service data is stored in the remote control key and can be read by your BMW service center. The system monitors engine oil, brake pads, brake fluid, and vehicle check requirements .

When should the transmission fluid be changed on my 2008 BMW 328xi?

While BMW considered the transmission fluid a "lifetime" fill, independent specialists strongly recommend servicing the automatic transmission at regular intervals . A common recommendation is every 80,000–100,000 miles, including replacing the fluid and filter .

When should the transfer case fluid be changed on my 2008 BMW 328xi?

The transfer case fluid should be replaced at regular intervals to ensure the longevity of the xDrive all-wheel-drive system. Specialists recommend this service every 80,000–100,000 miles . This is an xDrive-specific service that is critical for the all-wheel-drive system.

When should the brake fluid be replaced?

Brake fluid is a time-dependent service. It is typically recommended for replacement every two years to maintain braking performance and prevent internal corrosion.

What is the engine in the 2008 BMW 328xi?

The 2008 BMW 328xi is powered by the N52KP 3.0-liter naturally aspirated inline-6 engine, producing 230 horsepower at 6,500 RPM and 200 lb-ft of torque at 2,750 RPM .

What was the original warranty coverage on the 2008 BMW 328xi?

The 2008 BMW 328xi came with BMW Ultimate Service, which provided free scheduled maintenance for 48 months or 50,000 miles . The vehicle also carried a 4-year/50,000-mile basic warranty, a 4-year/50,000-mile powertrain warranty, and a 12-year/unlimited-mile rust warranty . These programs have long since expired for this model year.

Where can I find detailed service information for my 2008 BMW 328xi?

The Service and Warranty Information Booklet for US models provides the definitive maintenance schedule for your specific vehicle . The BMW 3 Series (E90, E91, E92, E93) Service Manual from Bentley Publishers is a comprehensive source of service information and technical specifications covering 2006-2011 models, including the 2008 328xi . This manual covers maintenance procedures, including ATF changes, cooling system service, and drivetrain maintenance.