Table of Contents Subject Page Complete Vehicle 2 Objectives of The Module 2 Purpose of The System 3 System Components 4 E46 MS Specifications Table 5 Vehicle Dimensions.5 Body Specifications.6 Engine Specifications.7 Running Gear/ Miscellaneous Specifications.8 E46M3 Body 9 Floor Assembly / Luggage Compartment Floor.10 Side Frame / Wheel Arches / Side Panels.12 Hood / Front Bumper / Rear Bumper / Fuel Filler Cap.12 Underbody Panels.13 E46 M3 Interior/Vehicle Trim 14 E46 M3 Sports Seats.15 Seat Design.16 Seat Functions.17 Aero Outside Mirrors / M-Multifunctional Steering Wheel.18 Cockpit.19 Central Body Electronics 20 Review Questions 22 COMPLETE VEHICLE Model: E46 M3 Production Date: 01/2001 Objectives of the Module After completing this module, you will be able to: Identify the differences on the E46 M3 from other production vehicles. List the Bus Systems used on the E46 M3. Describe the Sports Seat operation. Describe the Driveline and Running Gear used in the E46 M3. 2 E46 M 3 Complete Vehicle E46 M3 Complete Vehicle Introduction The E46 M3 is the third generation of the M3 replacing the E36 M3. In comparison to its predecessor, the high engine performance and dynamic driving char¬ acteristics is expressed in its sport-oriented design. The E46 M3 is a high performance automobile which assumes the leading position in its class. The E46 M3 is a high performance coupe based on the new E46/2 body. 00410000.tiff 3 E46 M3 Complete Vehicle System Components The vehicle is fitted with an in-line 6-cylinder 3246 ccm engine (554B32) which is used worldwide. The 4-valve induction engine with high pressure VANOS outputs 333 bhp at 7900 rpm. The maximum engine speed is 8000 rpm. The engine develops its maximum torque of 355 Nm at 4900 rpm. The engine management system is the MS S54. The drive train is reinforced to satisfy the engine’s increased horsepower and torque. The running gear of the E46/2 production vehicle and that of the E36 M3 form the basis of the E46 M3 running gear. In addition to the running gear which was specifically adapted to the M3, the vehicle also features: special wheels, Teves M K 20 dynamic drive control sys¬ tem, a variable locking M-differential and high performance brakes. The design of the E46 M3 makes it capable for everyday driving, economic operation, and high performance while meeting environmental requirements. 11410000.tiff 4 E46 M 3 Complete Vehicle E46 M3 Technical Data Vehicle Dimensions The overall length of the E46 M3 measures 4 mm longer than the E46 coupe (license plate bracket). Compared to the E46/2 production vehicle, the track width on the front and rearaxle of the E46 M3 have been increased considerably (track width: front axle +37 mm, rear axle +47mm). The new wider side panels enhance the sports character of the E46 M3. E46 M3 Side View (vehicle heights: 1372 mm Unloaded, 1363 mm loaded position) 00410001.bmp E46 Technical Data (Approach Angle) 00410002.bmp 5 E46 M 3 Technical Data 00410003.bmp E46 M3 Front View 00410004.bmp E46 M3 Rear View 00410005.bmp 6 E46 M3 Top View E46 M 3 Technical Data E46 M3 Specifications Table E46M3 E36 M3 Body Version Coupe Coupe Doors / Seating 2/5 2/5 Vehicle Length 4492 mm 4432 mm Vehicle Width 1780 mm 1709 mm Vehicle Height,Unladen 1372 mm 1336 mm Wheelbase 2731 mm 2700 mm Turning Radius 11.0m (36.1ft) Luggage Compartment Volume 410 L 291 L Fuel Tank Capacity 63 L 62 L C urb Weight, DIN 1495 kg 1441 Gross Vehicle Weight Rating 2000 kg Permissible Front Axle Load 970 kg Permissible Rear Axle Load 1140 kg Roof Load 75 kg E46 M3 E36 M3 Engine Type In-line, 6-cylinder, 4-valve S54B32 S52B32 Engine Management MS S54 MS 41.2 Engine Size 3246 ccm 3152 ccm Stroke 91.0 mm 89.6 mm Bore 87.0 mm 86.4 mm Torque 355 N m/4900 rpm 320 N m/3800 rpm Engine Output 333 bhp/7900 rpm 240 bhp/6000 rpm Max. Engine Speed 8000 rpm 6800 rpm Compression Ratio 11.5 :1 10.5 :1 Fuel Grade Premium Unleaded Premium Unleaded Engine Oil Change Capacity With Oil Filter 5.5 L 6.5 L 7 E46 M 3 Technical Data E46 M3 Specifications Table E46 M3 E36 M3 Running Gear Gearbox Designation * SG 6, Getrag D, S65420G S5D ZF 310Z Gear ratio, 1st gear 4.227 4.20 Gear ratio, 2nd gear 2.528 2.49 Gear ratio, 3rd gear 1.669 1.67 Gear ratio, 4th Gear 1.226 1.24 Gear ratio, 5th gear 1.00 Gear ratio, 6th gear 0.828 - Gear ratio, reverse gear 3.746 4.13 Oil Capacity 1.9 L 1.2 L Rear Axle Differential Gear Ratio 3.64 3.23 Oil Change Capacity 1.1 L 1.1 L Type of Steering Rack and Pinion Power Steering *Note: Refer to SMG II section for transmission specifications. Miscellaneous E46M3 Aerodynamic Drag CD 0.33 Top Speed 155mph (governed) Battery (V/Ah/A) 12/70/570 in luggage compartment Alternator 70/120 Valeo Washer Fluid (Reservoir fitted On Front Right Behind Front Apron) 5.3L 8 E46 M 3 Technical Data E46 M3 Body Changes Compared to E46/2 The increase in engine output, torque, dynamic driving characteristics and sport design of the E46 M3 places more demand requirements on the individual components in the body. Visual, functional as well as technical features of the E46 M3 body have been modified in order to satisfy all these requirements. The individual changes contribute to increasing the E46 M3 body rigidity. The visual differences of the E46 M3 as compared to the E46/2 in the body area include widening of the front and rear side panels, a modified aluminum hood as well as front and rear bumper covers. The increased body rigidity is achieved by the use of additional gusset plates and weld points. Both functional and technical modifications have been made to the side frame structures, front and rear wheel arches, reinforcement in the C-pillar area as well as the lug¬ gage compartment floor. The body of the E46 M3 corresponds to that of the E46/2 but with the following Changes: 1. Floor Assembly / Luggage Compartment Floor 2. Side Frame / Wheel Arches 3. Front / Rear Side Panels 4. Hood / Fuel Filler Flap 5. Front Bumper 6. Rear Bumper 7. C-Pillar Reinforced 8. Spring Strut Tower 9. Rear Axle Mounts 9 E46 M3 Body Floor Assembly / Luggage Compartment Floor The basic structure ofthe E46 M3 floor assembly corresponds to thatofthe E46/2 but with 3-specific modifications. The luggage compartment floor has been modified in orderto accommodate the largerrear silencer: The M-mobility system is mounted in a foam moulding in the luggage compart¬ ment floor. The retaining fixtures for the large volume rear silencer are located on the outer ends of the under body. E46 M3 foam moulding of M-mobility system in spare wheel well. E46 M3 M-mobility Air Pump 36410001 .jpg 10 E46 M3 Body Side Frame/Wheel Arches Due to the larger tire sizes, the side frame structures of the E46 M3 are modified in the area of the wheel cutouts. The front and rear wheel arches have been modified forthe larger tire sizes and track widths. The inner side section has also been modified as compared to the E46/2. The C-pillararea features additional reinforcement. The hole pattern of the front spring strut towers and rear shock absorber mounts is the same as on the standard parts. Side Panels The design of the front and rear side panels lends the E46 a sport appearance. The front fenders have been formed corresponding to the tire sizes and track width. The fender side grill represents an M-GmbH development. The rear quarter panels have also been formed corresponding to the tire sizes and track width. 1. Aluminum Hood with "Power Dome" 2. Front Bumper Larger Air Inlet 3. Larger Front Fender 4. Reinforced C-Pillar 5. Larger Rear Fender 00410006.eps 11 E46 M3 Body Hood The hood of the M3 is made of aluminum. The "powerdome” is an elevated section in the center of the hood which accents the sports-oriented character of the vehicle. The hood consists of the outer skin panel, an inner panel and the front inner panel. A reinforcement plate is integrated at the rear left and right for mounting the hinges. The gas struts for opening and closing the hood have been modified to the weight of the M3 hood. The hood latch is the same as that of the E46/2 production vehicle. Front Bumper The front bumper cladding is aerodynamically designed. The air inlets for brake cooling next to the fog lights are closed off. The a left fog light is used for engine air intake. let next to the 41410000.tiff Rear Bumper The cladding forthe rear bumper is also modified with painted PDC sensors. The PDC set¬ ting has been modified due to the changed positions of the PDC sensors in the rear bumper. Fuel Filler Flap The fuel filler flap is new and has been modified to the shape of the rear quarter panel. 12 E46 M3 Body Underbody Panels Index Designation 1 . Engine Bottom Panel (provides negative lift at the front axle) 2. Thrust Zone (reinforces the front axle area and provides specific cooling for the transmission) 3. Transmission Panel (provides additional cooling for the transmission) 4. V-Strut (connects the rear axle carrier to the body and reinforces the rear axle area) 5. Propeller shaft panel with opening at the rear constant-velocity joints (heat guard and cooling of constant-velocity joint to rear axle differential output flange) 6. Rear Filler panel 13 E46 M3 Body E46 M3 Interior/Vehicle Trim The E46/2 serves as the basis for the Interior/Vehicle trim of the E46 M3. The cockpit contains an M-Multifunction Sports Steering Wheel and specially designed seats. The interior trim and upholster/ of the E46 M 3 corresponds to that of the E46/2 but with the following changes: m M emblems, M trim fittings 2. Inside and outside mirrors (M mirror) 3. Interior trim panels and finishes EB Front seats (M Sport Seat) 5. Rear Seats E46 Trim and Accessories 1. Multifunction Sports Steering Wheel (MFL II) 2. Electric Seat Adjustment for Driver and Passenger (M-sport seat) T. Seat Heating M-sport steering wheel with button pad for cruise control (right). Button pad for multimedia (left) functions same as E46 series Electric seats optional Driver and passenger same as E46 4. Seat/mirror adjustment Including lumbar support 5. Windshield anti-glare strip Heat-Insulated Same as E46 Windshield 14 E46 M3 Interior/Vehicle Trim E46 M3 Sports Seats The M 3 is equipped with sport seats as standard equipment. The seat is manufactured by Lear. The E46/2 sport seats serve as the basis for the M3 sport seats. The sport seats are mechanical or electrical depending on the accessory package. For the first time, a variable side support is offered as an option. Air cushions fitted in the left and right side upholstery can be inflated or deflated to adapt to the body shape of the driver. In addition, a pneumatic lumbar support is fitted as in the E46/2. Seat Belt Tensioner Adjustable Thigh Support Operation Strip Variable Side Support Lumbar Support 52410000.eps 15 E46 M3 Interior/Vehicle Trim Seat Design The air supply system of the M3 sport seat can be seen when the back panel is removed. 52410001 eps Index Description A. Adjustment mechanism for easy-entry function B. Position of air cushion for left side support C. Position of air cushion for right side support D. The pump unit for the lumbar support and side support upholstery is located in a plastic sleeve. The pump unit can be replaced. E. Air Supply Lines 16 E46 M3 Interior/Vehicle Trim E i A. Motor for seat forward / backward adjustment B. Motor for seat backrest angle adjustment C. Motor for seat angle adjustment D. Motor for seat height adjustment E. Mechanical adjustment for thigh support Seat Functions A. Adjustment switch for variable side support cushions B. Adjustment switch for lumbar support (for space reasons, the electronics of switch A are integrated in switch B). Switch A is M- specific. C. Seat adjustment switch (same as E46/2) D. Backrest adjustment (same as E46/2) ¥! Seat memory switch (driver's side only) A B C D E 52410003.eps 17 E46 M3 Interior/Vehicle Trim E46 M3 General M Equipment Aero Outside Mirror The E46 M3 Aero mirrors can be "manually” folded up for additional clearance in tight spaces. The drivercan adjustthe outside mirrors by the switch on the handle in the doortrim panel. The mirror memory control unit is located in the front of the door behind the door panel. The mirror adjustment and mirror heating functions correspond to those of the E46/2. M-Multifunctional Sports Steering Wheel (MFL II) The M FL in the E46 M3isaBMW M development. The assembly and operation of the but¬ tons for audio communication and cruise control function as in the E46/2. 18 E46 M3 Interior/Vehicle Trim Cockpit Characteristic M styling elements in the E46 M3: Sports steering wheel, instrument cluster, gearshift lever and center switching console. A B C D E 00410008.eps F A. Driver Seat Heater Switch B. Dynamic Stability Control C. Hi-Fi System Switch D. Tire Pressure Warning System E. Sport Switch (throttle opening characteristics) F. Passenger Seat Heater Switch 19 E46 M3 Interior/Vehicle Trim Central Body Electronics The Body Electronic Systems of the E46 M3 are carried over from the E46 Coupe and Sedan models. The Driver Information System and Central Body Electronic System (ZKE V) continue to be used as the primary body electronic systems. The M 3 uses the "K"- Bus as the Primary communication link between body electronic con¬ trol modules. The "D" - Bus is used as the diagnostic interface from the diagnostic equip¬ ment to the instrument cluster. The "CAN” Bus is used as the communication link between all power train systems. Finally, the "M" - Bus is used for IH KA operation of the flap control stepper motors. E46 M3 Bus Systems INSTRUMENTCLUSTER 20 E46 M3 Central Body Electronics Instrument Cluster The instrument cluster in the E46 M3 is similar to the cluster used in the coupes and it is the main source for information display. Information about the status of different operating systems in the vehicle is displayed through the gauges, LCD display, warning LEDs and Gong. Switches are also integrated in the instrument cluster to reset the trip mileage, per¬ form BC functions and to change over some units of measurement e.g. degrees F to degrees C. Additional to the E46 M3 Cluster is the use of an engine oil temperature gauge which replaces the fuel economy gauge below the tachometer. The tachometer incorporates the cold engine warning LEDs that were introduced with the E39 M 5. Starting at 4000 RP M, orange LEDs are illuminated with a cold engine start up. The LEDs will go out, in 500 RP M increments, as the engine warms up. The M S S54 engine control system monitors the engine oil temperature and signals the instrument cluster over the CAN line foroperation of the oil temperature gauge and illumination of the LEDs. Central Body Electronics (ZKE) The following functions are directly controlled by the General Module (GM V): Windshield wiping/washing with optional Rain Sensor Interface Central locking with power trunk release FZV Keyless Entry Power window control Car Memory/Key Memory Capabilities Interior lighting DWA alarm system (optional) Consumer cut-off/sleep mode The following functions are included as body electrical systems but are not directly con¬ trolled by the G M V: Rain Sensor Sunroof operation (Sunroof Control module on K Bus). Driver's seat electrical adjustment with memory (Seat Memory control module on K Bus) Passenger seat electrical adjustment (no control module - switch controlled) M irror M emory - adjustment/heating (also includes windshield washer jet heating switch controlled) 21 E46 M3 Central Body Electronics Review Questions 1. What is the engine designation for the E46 M3 7 2. What body components have changed for the E46 M 3 as compared to the E46/2 7 3. What function does the "Sport Switch" have 7 _ 4. List the Bus systems used on the E46 M3. 5. What new feature can be found in the E46 M3 Sports Seat 7 22 E46 M 3 Complete Vehicle