🏷️ Basic Information

Make:

BMW

Model:

325i

Model Code:

E90 (Sedan), E91 (Wagon), E92 (Coupe), E93 (Convertible)

Production Years Covered:

2006, 2007, 2008, 2009, 2010

Chassis Codes:

E90, E91, E92, E93

👋 Introduction

Segment:

Compact Executive Sedan/Coupe/Wagon

Target Audience:

Enthusiast owners, independent repair shops, DIY mechanics.

Key Competitors:

Audi A4, Mercedes-Benz C-Class, Lexus IS, Infiniti G35.

Driving Dynamics:

Renowned for balanced chassis, precise steering, and engaging driving experience.

Powertrain:

Smooth and potent 3.0L inline-six engine.

Build Quality:

Premium interior materials and solid construction.

📋 Manual Details

Coverage Overview:

Comprehensive repair, maintenance, and troubleshooting for all BMW 325i models within the specified production years.

Engine Variants Covered:

N52B30 (3.0L Inline-6)

Transmission Variants Covered:

6-speed manual (S6S 310Z / Getrag 420G), 6-speed automatic (GA6HP19Z)

Body Styles Covered:

Sedan (E90), Sports Wagon (E91), Coupe (E92), Convertible (E93)

Estimated Page Count:

~2000+ pages (typical for comprehensive workshop manuals of this era)

Manual Type:

Workshop Repair and Service Manual

Content Focus:

Diagnostic, repair, maintenance, wiring diagrams, specifications, procedures.

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Complete engine overhaul, cylinder head, pistons, connecting rods, crankshaft, timing system, lubrication system.

Engine Management:

Fuel injection, ignition system, electronic engine control (DME), VANOS, Valvetronic, emissions control.

Cooling System:

Radiator, water pump, thermostat, coolant flow, pressure testing.

Exhaust System:

Exhaust manifold, catalytic converters, mufflers, oxygen sensors.

Fuel System:

Fuel pump, fuel filter, fuel injectors, fuel pressure regulation, evaporative emission control (EVAP).

Transmission Manual:

Clutch system, gearbox overhaul, shift linkages, torque specifications.

Transmission Automatic:

Torque converter, valve body, mechatronics unit, transmission control unit (TCU), fluid and filter replacement.

Drivetrain:

Driveshafts, constant velocity joints (CV joints), differential, rear axle.

Brakes:

Brake system components (discs, pads, calipers), ABS, DSC (Dynamic Stability Control), brake fluid specifications and bleeding procedures.

Suspension:

Front and rear suspension components (struts, shock absorbers, control arms, bushings), alignment specifications.

Steering:

Power steering system, steering rack, steering column, alignment.

Electrical System:

Battery, charging system (alternator), starter motor, ignition system.

Lighting System:

Headlights, taillights, interior lighting, fog lights, bulb specifications.

Body And Chassis:

Body panels, doors, windows, locks, exterior trim, structural components.

Interior Systems:

Seats, dashboard, climate control, interior trim, airbags.

Climate Control:

HVAC system, refrigerant, compressor, blower motor, diagnostic procedures.

Infotainment Audio:

Radio, speakers, CD player, iDrive system (for applicable trims).

Safety Systems:

Airbags, seatbelts, pre-tensioners, ABS, DSC.

Wiring Diagrams:

Detailed electrical schematics for all major systems.

Maintenance Procedures:

Oil changes, filter replacements, spark plug replacement, coolant flushes, brake fluid changes, inspection routines.

Repair Procedures:

Component removal and installation, engine rebuild, transmission overhaul, suspension and brake component replacement, electrical diagnostics and repair.

Troubleshooting Guides:

Systematic diagnostic steps for common and uncommon issues, fault code interpretation.

Diagnostic Procedures:

Procedures for using diagnostic tools (e.g., ISTA/D) and interpreting sensor data.

Torque Specifications:

Accurate torque values for all critical fasteners and assembly points.

Fluid Capacities And Types:

Precise fluid capacities and recommended fluid specifications for engine oil, coolant, brake fluid, transmission fluid, etc.

Reset Procedures:

Procedures for resetting service indicators and adaptive learning parameters.

Depth Of Coverage:

From basic scheduled maintenance to complete engine and transmission rebuilds, including advanced electrical diagnostics and component-level repair.

Diagnostic Capabilities:

Detailed guidance on diagnosing electrical faults, engine performance issues, and transmission behavior.

Component Level Repair:

Instructions for repairing or replacing individual components within larger assemblies.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable for efficient information retrieval.

Print Recommendation:

Optimized for digital viewing; high-resolution diagrams and text for clear printing of specific sections.

Binding For Download:

N/A (Digital download)

Paper Type For Download:

N/A (Digital download)

⚙️ Engine Specifications

Engine Code:

N52B30

Engine Type:

Naturally Aspirated Inline-6 Cylinder, DOHC, 24 Valves

Displacement:

2996 cc (3.0 Liters)

Bore X Stroke:

85.0 mm x 88.0 mm

Compression Ratio:

10.7:1

Horsepower Peak:

255 hp @ 6600 rpm

Torque Peak:

214 lb-ft @ 2750 rpm

Redline:

7000 rpm

Fuel Delivery:

Electronic Fuel Injection (EFI) with Direct Ignition (DISA II variable intake manifold, Valvetronic)

Fuel Type:

Premium Unleaded Gasoline (91+ Octane Recommended)

ECU Type:

Bosch Motronic MED17.2

🔧 Transmission

Standard Transmission:

6-Speed Manual (Getrag 420G / S6S 310Z)

Optional Transmission:

6-Speed Steptronic Automatic (GA6HP19Z)

Automatic Transmission Features:

Adaptive shift logic, manual mode (Steptronic), paddle shifters (optional on some trims).

Manual Transmission Fluid Spec:

BMW MTF-LT-2 or equivalent

Automatic Transmission Fluid Spec:

BMW ATF 6 (P/N 83 22 0 024 249) or equivalent (e.g., Pentosin ATF1)

📐 Dimensions

Wheelbase:

E90/E91: 108.7 inches (2760 mm); E92/E93: 108.7 inches (2760 mm)

Length:

E90: 181.4 in (4608 mm); E91: 180.7 in (4590 mm); E92: 181.1 in (4600 mm); E93: 181.1 in (4600 mm)

Width:

70.1 in (1781 mm)

Height:

E90: 56.7 in (1440 mm); E91: 56.7 in (1440 mm); E92: 55.7 in (1415 mm); E93: 55.3 in (1405 mm)

Wheel Bolt Pattern:

5x120

Wheel Size:

Typically 17-inch or 18-inch alloy wheels (optional 19-inch)

Curb Weight:

Approx. 3500-3800 lbs (depending on body style and equipment)

🛡️ Safety Features

NHTSA Frontal Impact Driver:

5-Star (for Sedan models)

NHTSA Frontal Impact Passenger:

5-Star (for Sedan models)

IIHS Moderate Overlap Frontal Offset:

Good (for Sedan models)

Active Safety Features:

Anti-lock Braking System (ABS), Dynamic Stability Control (DSC), Traction Control System (TCS), Dynamic Brake Control (DBC), Brake Fade Compensation, Brake Drying.

Passive Safety Features:

Front airbags, front side-impact airbags, front knee airbags, active front head restraints, pre-tensioned seatbelts, LATCH child seat anchors.

Convertible Safety Features:

Pop-up roll bars.

💡 Technology Features

Infotainment System:

BMW iDrive (optional, various versions depending on year and options), Professional Radio, Business Radio.

Connectivity Options:

Bluetooth, USB/Aux input (often optional or added later), satellite radio readiness.

Driver Assistance Features:

Cruise control, Park Distance Control (PDC), optional Xenon headlights with adaptive lighting, rain-sensing wipers.

Engine Technology:

Valvetronic (variable valve lift), VANOS (variable camshaft timing), DISA II (dual-path intake manifold).

🔧 Maintenance

Oil Change Interval:

Variable, typically indicated by the Condition Based Service (CBS) system, often around 10,000-15,000 miles or annually.

Brake Fluid Change Interval:

Every 2 years, regardless of mileage.

Engine Air Filter Replacement:

Variable, typically between 20,000-30,000 miles or as indicated by CBS.

Cabin Air Filter Replacement:

Typically every 15,000-20,000 miles or annually.

Spark Plug Replacement:

Around 60,000 miles for N52 engines (check specific manual for exact interval).

Engine Oil Specification:

BMW Longlife-01 (LL-01) or BMW Longlife-04 (LL-04), SAE 0W-30 or 5W-30 Synthetic

Coolant Specification:

BMW Blue Antifreeze (G48 ethylene glycol-based) or equivalent

Power Steering Fluid Specification:

Pentosin CHF 11S or BMW PSF-4

Common Issues List:

Oil pan gasket leaks, valve cover gasket leaks, VANOS solenoid issues, coolant expansion tank leaks, ignition coil failures, water pump failures (often electric on later models), CBS system sensor inaccuracies, CCV (Crankcase Ventilation) system clogging.

📚 Vehicle History

Brand Legacy:

BMW, established in 1916, is renowned for its 'Ultimate Driving Machine' philosophy, emphasizing performance, luxury, and engineering precision.

E90 Generation Introduction:

The E90 generation debuted in 2005 for the 2006 model year, marking a significant evolution from the E46 generation with new styling, technology, and powertrains.

E90 Generation Facelift:

Mid-cycle refresh (LCI) occurred for the 2009 model year, with updated front and rear styling, interior trim, and technology features.

Manufacturing Locations:

Primarily Dingolfing and Regensburg, Germany; also other global BMW production facilities.

🏆 Awards & Recognition

Ward S 10 Best Engines:

The N52 engine family, including the 325i's variant, was recognized by Ward's AutoWorld as one of the 10 Best Engines multiple times for its refinement and performance.

Consumerreports Reliability Rating:

Varies by year; early E90 models generally had average to above-average reliability, with later years showing some improvement or specific recurring issues highlighted.

Epa Fuel Economy Rating Est:

Approx. 19-20 MPG City / 27-28 MPG Highway (for 325i with automatic transmission)