🏷️ Basic Information

Make:

BMW

Model:

335xi

Model Years Covered:

2006, 2007, 2008, 2009, 2010

Chassis Code:

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

Engine Code Primary:

N54B30

👋 Introduction

Vehicle Segment:

Entry-level luxury sport sedan/coupe/convertible.

Competitive Set:

Audi A4 Quattro, Mercedes-Benz C-Class, Lexus IS, Infiniti G37.

Key Differentiators:

The 335xi stood out with its potent twin-turbocharged inline-six engine (N54), offering class-leading horsepower and torque, coupled with BMW's renowned xDrive all-wheel-drive system for enhanced traction and performance in various conditions.

Powertrain:

The N54B30 engine, a 3.0-liter twin-turbocharged inline-six, delivered exceptional power and responsiveness, making it a performance benchmark in its class.

Drivetrain:

xDrive all-wheel-drive system provided enhanced grip and stability, particularly beneficial in adverse weather conditions.

Driving Dynamics:

BMW's signature balanced chassis and responsive steering offered engaging driving dynamics.

📋 Manual Details

Manual Type:

Service Repair Workshop Manual

Language:

English

Format:

Digital (likely PDF, though not explicitly stated, common for workshop manuals of this era)

Estimated Page Count:

1500-2500+ pages (typical for comprehensive workshop manuals covering multiple chassis variants and engines)

📖 Manual Coverage

Engine Mechanical:

Complete overhaul, including cylinder head, block, pistons, crankshaft, connecting rods, timing system (chain, guides, tensioners), lubrication system, cooling system, fuel delivery, intake manifold, exhaust manifold, turbochargers (twin-turbo system), intercooler.

Engine Electrical:

Ignition system, fuel injection system (high-pressure direct injection), ECU (DME) function and diagnostics, sensors (crankshaft, camshaft, knock, lambda, MAF, MAP), actuators, starter, alternator, battery management.

Transmission:

Manual Transmission (6-speed Getrag GS6-37BZ), Automatic Transmission (ZF 6HP19TU). Covers internal components, clutch, torque converter, valve body, mechatronics unit, shift solenoids, transmission control module (TCM), fluid specifications, and refill procedures.

Drivetrain:

All-wheel-drive (xDrive) system (ATC300 transfer case), front and rear differentials, driveshafts, CV joints, wheel bearings, hub assemblies.

Suspension:

Front and rear suspension components (struts, shocks, control arms, sway bars, bushings), power steering system (hydraulic), wheel alignment specifications.

Brakes:

Front and rear brake systems (vented discs), ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), brake booster, master cylinder, brake lines, calipers, pads, rotors, parking brake, fluid specifications (DOT 4).

Electrical System:

Body control module (BCM), comfort access, lighting (headlights, taillights, interior), wipers, horn, power windows, mirrors, seats, sunroof, keyless entry, immobilizer system, fuse box diagrams, relay locations, wiring diagrams.

Climate Control:

HVAC system, A/C compressor, condenser, evaporator, refrigerant (R134a), blower motor, climate control unit, cabin air filter replacement.

Body And Chassis:

Body panels, doors, hood, trunk lid, bumpers, windows, seals, chassis structure, rust prevention, interior trim, sound deadening.

Diagnostics And Troubleshooting:

OBD-II (On-Board Diagnostics II) procedures, fault code interpretation, diagnostic trouble codes (DTCs), common failure modes, systematic troubleshooting flowcharts.

Routine Maintenance:

Oil and filter change, air filter replacement, cabin filter replacement, spark plug replacement, brake fluid flush, coolant flush, differential fluid change, transmission fluid change, belt replacement.

Major Repairs:

Engine rebuilds (including turbocharger servicing/replacement), clutch replacement, transmission overhaul, differential rebuild, suspension component replacement, brake caliper rebuild, power steering pump replacement, alternator replacement, starter replacement.

Diagnostic Procedures:

Step-by-step diagnostic routines for specific symptoms, use of diagnostic scan tools, sensor testing, actuator testing, wiring harness continuity checks.

Electrical Repairs:

Wiring harness repair, connector diagnosis and replacement, component replacement (e.g., ABS module, DSC module, fuel pump, ECU).

Bodywork And Trim:

Door panel removal, interior trim piece replacement, bumper cover replacement, headlight/taillight assembly replacement.

Wheel And Tire:

Tire changing, wheel balancing, tire pressure monitoring system (TPMS) reset.

Diagnostic Tools:

Emphasis on BMW's proprietary diagnostic software (ISTA/P, DIS) and specialized tools, but also covers general automotive diagnostic principles.

Troubleshooting Methodology:

Detailed troubleshooting flowcharts and symptom-based diagnostic trees, covering electrical, mechanical, and software issues.

Rebuild Specifications:

Includes critical torque specifications, bearing clearances, piston ring end gap, valve lash adjustments (if applicable), and other precision measurements for engine and transmission overhauls.

Electrical Diagrams:

Comprehensive wiring diagrams for all major systems, including power distribution, signal routing, and sensor inputs/outputs.

Maintenance Scheduling:

Detailed recommended service intervals based on mileage and time, including specific checks and replacements for each service level.

📊 Manual Specifications

File Type:

Likely PDF (Portable Document Format)

Searchability:

Typically searchable text, allowing quick navigation to specific topics.

Printability:

Designed to be printable, often with individual page formatting suitable for a workshop environment.

Graphics Resolution:

High-resolution diagrams, schematics, and photographic illustrations.

Diagram Clarity:

Clear, detailed technical drawings and exploded views for assembly and disassembly procedures.

Physical Manual Binding:

N/A (Digital Format)

Physical Manual Paper:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Name:

N54B30

Engine Type:

Inline-6 Cylinder, Twin-Turbocharged, Direct Injection

Displacement:

2979 cc (3.0 Liters)

Bore X Stroke:

84.0 mm x 90.0 mm

Compression Ratio:

10.2:1

Horsepower:

300 hp @ 5800 rpm

Torque:

300 lb-ft (400 Nm) @ 1300-5000 rpm

Redline:

7000 rpm

Fuel Type:

Premium Unleaded Gasoline (91+ Octane Recommended)

Fuel Delivery:

High-pressure direct injection (HPI)

Turbochargers:

Sequential Twin-Turbocharger System (smaller turbo for low-end response, larger turbo for high-end power)

🔧 Transmission

Transmission Type Std:

6-Speed Manual (Getrag GS6-37BZ)

Transmission Type Opt:

6-Speed Automatic (ZF 6HP19TU) with Steptronic and Adaptive Transmission Control (ATC)

Manual Gear Ratios:

1st: 4.110, 2nd: 2.315, 3rd: 1.542, 4th: 1.179, 5th: 1.000, 6th: 0.846, Reverse: 3.456

Automatic Gear Ratios:

1st: 4.171, 2nd: 2.340, 3rd: 1.521, 4th: 1.143, 5th: 0.867, 6th: 0.691, Reverse: 3.405

Transfer Case Type:

BMW xDrive All-Wheel Drive System (ATC300)

Manual Transmission Fluid:

BMW MTF LT-2 (or equivalent API GL-4 SAE 75W-80)

Automatic Transmission Fluid:

ZF LifeguardFluid 6 (or equivalent ATF Shell M-1375.4)

Transfer Case Fluid:

BMW DTF-1 (or equivalent transfer case fluid)

📐 Dimensions

Length E90 Sedan:

180.6 inches (4587 mm)

Width E90 Sedan:

70.1 inches (1781 mm)

Height E90 Sedan:

56.1 inches (1425 mm)

Wheelbase E90 Sedan:

108.7 inches (2760 mm)

Length E92 Coupe:

181.0 inches (4597 mm)

Wheelbase E92 Coupe:

108.7 inches (2760 mm)

Trunk Capacity E90 Sedan:

12.0 cu ft (340 L)

Trunk Capacity E92 Coupe:

11.1 cu ft (315 L)

Curb Weight E90 Sedan Auto:

Approx. 3770 lbs (1710 kg)

Curb Weight E92 Coupe Auto:

Approx. 3815 lbs (1730 kg)

🛡️ Safety Features

NHTSA Front Crash Test Sedan:

5-Star (for driver and front passenger)

IIHS Crash Test Sedan:

Good (in front, side, and rear impact tests, Top Safety Pick status for some years)

Standard Safety Features:

Dynamic Stability Control (DSC), Anti-lock Braking System (ABS), Traction Control System (TCS), Dynamic Traction Control (DTC), Brake Fade Compensation, Brake Drying, Hill Start-Off Assistant.

Optional Safety Features:

Adaptive Headlights, Tire Pressure Monitor.

Airbags:

Front dual-stage airbags, front side-impact airbags, head protection system (front and rear side curtain airbags).

Seatbelts:

3-point inertia-reel seatbelts with pretensioners and force limiters for all seating positions.

💡 Technology Features

Infotainment System:

BMW iDrive system (CCC or CIC depending on the specific year and options). Features include navigation, radio (AM/FM/Satellite), CD player, and optional Bluetooth connectivity.

Stability Control:

Standard DSC (Dynamic Stability Control) with DTC functionality.

Lighting Technology:

Standard Halogen headlights, optional Xenon Adaptive Headlights.

Connectivity Options:

Optional Bluetooth hands-free interface, USB audio interface (later models).

🔧 Maintenance

Oil Change Interval:

BMW Condition Based Service (CBS) system; typically every 10,000-15,000 miles or as indicated by the vehicle's service indicator, using synthetic oil.

Spark Plug Replacement:

Typically around 60,000-100,000 miles, depending on usage and specific plug type (e.g., long-life iridium).

Engine Air Filter:

Check every 15,000 miles, replace as needed or around 30,000 miles.

Cabin Air Filter:

Replace every 15,000-30,000 miles, or annually.

Brake Fluid Flush:

Every 2 years, regardless of mileage.

Coolant Flush:

First replacement at 100,000 miles or 10 years, then every 2 years or 50,000 miles thereafter.

Engine Oil Type:

SAE 0W-30 or 5W-30 Synthetic Engine Oil meeting BMW LL-01 or LL-04 specification.

Coolant Type:

BMW Blue Antifreeze/Coolant (G48) or equivalent propylene glycol-based coolant.

Brake Fluid Type:

DOT 4 High Performance Brake Fluid.

Common Failures N54:

High-pressure fuel pump (HPFP) failure, vacuum leak issues (boost leaks due to cracked vacuum lines, intake manifold gaskets, charge pipe connections), injector failure, turbocharger wastegate rattle/failure, water pump and thermostat failure (electric water pump), ignition coil and spark plug issues.

Common Failures Drivetrain:

Automatic transmission mechatronics unit failure, minor leaks from differential seals.

Common Failures Electronics:

HVAC blower motor resistor failure, idrive controller issues.

📚 Vehicle History

Bmw Legacy:

BMW has a long-standing reputation for producing driver-focused, high-performance vehicles with excellent engineering and build quality.

E90 Generation Intro:

The E90 generation of the 3 Series was introduced in 2006, succeeding the E46 generation. The 335i and 335xi variants were new flagship performance models within the 3 Series lineup.

N54 Engine Introduction:

The N54 twin-turbocharged engine debuted in the 335i/xi for the 2007 model year, marking a significant performance leap and the return of a turbocharged engine to BMW's core lineup.

Production Period:

2006-2010

Manufacturing Plants:

Primarily produced at BMW's plant in Munich, Germany, and Dingolfing, Germany. Some variants may have also been assembled in other global locations.

🏆 Awards & Recognition

Ward Auto World Engine Award:

The N54 engine received multiple 'Ward's 10 Best Engines' awards for its performance, technology, and efficiency during its production run.

Performance Reviews:

Consistently praised by automotive journalists for its exhilarating performance, handling, and premium interior.

Certification Type:

N/A (This refers to the manual itself, not the vehicle. The manual is a professional-grade service document, essentially a certification of its completeness and accuracy for professional use).