Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Infiniti M45FACTORY OEM SERVICE PROCEDURE
External Pages
These are pages that do not belong to the exact selected vehicle (2003 Infiniti M45), but are still accessible from a link in your vehicle's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle.
- Different car
- Section 1 (Electronic Suspension - Wiring Diagrams)
- Section 2 (Engine Controls - Self-Diagnostics - Q45)
- Section 3 (Wiring Diagrams)
- Section 4 (Engine Controls - Service & Adjustment Specifications)
- Section 5 (Engine Controls - On-Vehicle Adjustments)
- Section 6 (Engine Controls - Basic Diagnostic Procedures)
- Section 7 (Engine Controls - Self-Diagnostics)
- Section 8 (Engine Controls - Self-Diagnostics - 2.2L)
- Section 9 (Engine Controls - Trouble Shooting - No Codes)
- Section 10 (Engine Controls - System & Component Testing)
- Section 11 (Engine Controls - Pin Voltage Charts)
- Section 12 (Vacuum Diagrams)
- Section 13 (Engine Controls - Removal, Overhaul & Installation)
- Section 14 (Engine Performance - Wiring Diagrams)
- Section 15 (Wiring Diagrams)
- Section 16 (Engine Controls - Service & Adjustment Specifications)
- Section 17 (Engine Controls - On-Vehicle Adjustments)
- Section 18 (Engine Controls - Theory & Operation)
- Section 19 (Engine Controls - Basic Diagnostic Procedures)
- Section 20 (Engine Controls - Self-Diagnostics)
- Section 21 (Engine Controls - Self-Diagnostics)
- Section 22 (Engine Controls - Self-Diagnostics)
- Section 23 (Engine Controls - Trouble Shooting - No Codes)
- Section 24 (Engine Controls - System & Component Testing)
- Section 25 (Engine Controls - System & Component Testing)
- Section 26 (Engine Controls - Pin Voltage Charts)
- Section 27 (Vacuum Diagrams)
- Section 28 (Engine Controls - Removal, Overhaul & Installation)
- Section 29 (Wiring Diagrams)
- Section 30 (Engine Controls - On-Vehicle Adjustments - 4 CYL & V6)
- Section 31 (Engine Controls - Basic Diagnostic Procedures - 4 CYL & V6)
- Section 32 (Engine Controls - Self-Diagnostics)
- Section 33 (Engine Controls - Self-Diagnostics - 1.8L - XE, GXE)
- Section 34 (Engine Controls - Self-Diagnostics - Quest)
- Section 35 (Engine Controls - Trouble Shooting - No Codes - 4 CYL & V6)
- Section 36 (Engine Controls - System & Component Testing - 4 CYL & V6)
- Section 37 (Engine Controls - Pin Voltage Charts - 4 CYL & V6)
- Section 38 (Vacuum Diagrams)
- Section 39 (Engine Controls - Removal, Overhaul & Installation)
- Section 40 (Engine Performance Wiring Diagrams)
- Section 41 (Disc Brakes)
- Section 42 (Disc Brakes)
- Section 43 (Starters)
- Section 44 (Automatic A/C-Heater Systems)
- Section 45 (Automatic Transmission Diagnosis - U140E & U140F)
- Section 46 (System Wiring Diagrams)
- Section 47 (System Wiring Diagrams)
- Section 48 (System Wiring Diagrams)
- Section 49 (Overhaul - A650E)
- Section 50 (Automatic Transmission - Diagnosis)
- Section 51 (Diagnosis - U150E)
- Section 52 (Engine Controls - Self-Diagnostics - 3.2L)
- Section 53 (Automatic Transmission Shift Interlock Systems)
- Section 54 (Computer Relearn Procedures - Import)
- Section 55 (Engine Controls Self-Diagnostics - Pathfinder & QX4)
- Section 56 (Engine Controls - Self-Diagnostics)
- Section 57 (Air Bag Restraint Systems)
- Section 58 (Air Bag Restraint Systems)
- Section 59 (Air Bag Restraint Systems)
- Section 60 (Air Bag Restraint Systems)
- Section 61 (System Wiring Diagrams)
- Section 62 (System Wiring Diagrams)
- Section 63 (System Wiring Diagrams)
- Section 64 (System Wiring Diagrams)
- Section 65 (Power Door Locks, Trunk Lid & Fuel Door Release)
- Section 66 (Engine Controls - Service & Adjustment Specifications)
- Section 67 (Engine Controls - On-Vehicle Adjustments)
- Section 68 (Engine Controls - Theory & Operation)
- Section 69 (Engine Controls - Basic Diagnostic Procedures)
- Section 70 (Engine Controls - Self-Diagnostics)
- Section 71 (Engine Controls - Self-Diagnostics)
- Section 72 (Engine Controls - Self-Diagnostics)
- Section 73 (Engine Controls - Self-Diagnostics)
- Section 74 (Engine Controls - Self-Diagnostics)
- Section 75 (Engine Controls - Trouble Shooting - No Codes)
- Section 76 (Engine Controls - System & Component Testing)
- Section 77 (Engine Controls - System & Component Testing)
- Section 78 (Engine Controls - System & Component Testing)
- Section 79 (Engine Controls - Pin Voltage Charts)
- Section 80 (Engine Controls - Sensor Operating Range Charts)
- Section 81 (Vacuum Diagrams)
- Section 82 (Engine Controls (Removal & Installation))
- Section 83 (Engine Controls - Self-Diagnostics)
- Section 84 (Engine Controls - Service & Adjustment Specifications)
- Section 85 (Engine Controls - On-Vehicle Adjustments)
- Section 86 (Engine Controls - Basic Diagnostic Procedures)
- Section 87 (Engine Controls - Self-Diagnostics)
- Section 88 (Engine Controls Self-Diagnostics - Pathfinder)
- Section 89 (Engine Controls - Trouble Shooting - No Codes)
- Section 90 (Engine Controls - System & Component Testing)
- Section 91 (Engine Controls - Pin Voltage Charts)
- Section 92 (Vacuum Diagrams)
- Section 93 (Engine Controls - Self-Diagnostics (QG18DE))
- Section 94 (Multiplex Communication System)
- Section 95 (Engine Immobilizer System)
- Section 96 (Anti-Theft Systems)
- Section 97 (Remote Keyless Entry Systems)
- Section 98 (Power Mirrors)
- Section 99 (Power Seats)
- Section 100 (Cruise Control Systems)
- Section 101 (Instrument Panel)
- Section 102 (Steering Column Switches)
- Section 103 (Wiper/Washer Systems)
- Section 104 (Automatic Headlights)
- Section 105 (Power Moon Roofs)
- Section 106 (Anti-Lock)
- Section 107 (Anti-Lock)
- Section 108 (Multiplex Communication System)
- Section 109 (Body Control System)
- Section 110 (Instrument Panel)
- Section 111 (Steering Column Switches)
- Section 112 (Automatic Headlights & Lighting)
- Section 113 (Wiper/Washer Systems)
- Section 114 (Power & Heated Seats)
- Section 115 (Moon Roof)
- Section 116 (Power Windows)
- Section 117 (Power Door Locks & Liftgate)
- Section 118 (Anti-Theft System)
- Section 119 (Remote Keyless Entry)
- Section 120 (Engine Immobilizer)
- Section 121 (Cruise Control)
- Section 122 (Instrument Panel Diagnosis & Testing)
- Section 123 (Anti-Lock Brake System)
- Section 124 (Rear Window Defogger)
- Section 125 (Power Windows)
- Section 126 (Electronic Suspension)
- Section 127 (Smart Entrance Control Unit)
- Section 128 (Anti-Theft System)
- Section 129 (Power Door Locks)
- Section 130 (Remote Keyless Entry System)
- Section 131 (Instrument Panel)
- Section 132 (Engine Immobilizer System - Diagnosis)
- Section 133 (Fuses & Circuit Breakers)
- Section 134 (Servicing A/T)
- Section 135 (Front Suspension)
- Section 136 (Wheel Alignment Specifications & Adjustment Procedures)
- Section 137 (Timing Belt Replacement - 4.3L V8)
- Section 138 (Computer Relearn Procedures)
- Section 139 (Computer Relearn Procedures)
- Section 140 (Engine Controls - Self-Diagnostics)
- Section 141 (Engine Controls - System & Component Testing)
- Section 142 (System Wiring Diagrams)
- Section 143 (System Wiring Diagrams)
- Section 144 (System Wiring Diagrams)
- Section 145 (Engine Controls Removal & Installation)
- Section 146 (System Wiring Diagrams)
- Section 147 (System Wiring Diagrams)
- Section 148 (System Wiring Diagrams)
- Section 149 (System Wiring Diagrams)
- Section 150 (System Wiring Diagrams)
- Section 151 (Engine Mechanical)
- Section 152 (Engine Mechanical)
- Section 153 (Engine Controls - Removal & Installation)
- Section 154 (Engine Controls - Removal & Installation)
- Section 155 (Engine Controls - Removal & Installation)
- Section 156 (Air Bag Restraint Systems)
- Section 157 (Air Bag Restraint Systems)
- Section 158 (Air Bag Restraint Systems)
- Section 159 (Air Bag Restraint Systems)
- Section 160 (Common Specs & Procedures)
- Section 161 (Computer Relearn Procedures)
- Section 162 (Specifications & Procedures)
- Section 163 (Wheel Alignment Specifications & Procedures)
- Section 164 (Wheel Alignment Specifications & Adjustment Procedures)
- Section 165 (Wheel Alignment Specifications & Procedures)
- Section 166 (Wheel Alignment Specifications & Adjustment Procedures)
- Section 167 (Brakes Mechanical)
- Section 168 (Electrical Component Locator)
- Section 169 (Electrical Component Locator)
- Section 170 (Disc & Drum)
- Section 171 (Electric Cooling Fans)
- Section 172 (Axle Shafts - Front)
- Section 173 (Axle Shafts)
- Section 174 (Axle Shafts - Rear)
- Section 175 (Charging System - Generators & Regulators)
- Section 176 (Front Suspension)
- Section 177 (Front Suspension)
- Section 178 (Cooling System Specifications & Drive Belt Routing)
- Section 179 (Rear Suspension)
- Section 180 (Rear Suspension)
- Section 181 (System Wiring Diagrams)
- Section 182 (System Wiring Diagrams)
- Section 183 (System Wiring Diagrams)
- Section 184 (System Wiring Diagrams)
- Section 185 (Generators & Regulators)
- Section 186 (Automatic Transmission Servicing)
- Section 187 (Automatic Transmission Servicing)
- Section 188 (Generators & Regulators)
- Section 189 (Generators & Regulators)
- Section 190 (Servicing)
- Section 191 (Starting System)
- Section 192 (Starters)
- Section 193 (Air Bag Restraint Systems)
- Section 194 (Air Bag Restraint Systems)
- Section 195 (Automatic Transmission)
- Section 196 (Automatic Air Conditioner)
- Section 197 (Brake Control System)
- Section 198 (Engine Cooling System)
- Section 199 (Engine Lubrication System)
- Section 200 (Starting & Charging System)
- Section 201 (Power Steering System)
- Section 202 (Accelerator Control System)
- Section 203 (Wiper, Washer & Horn)
- Section 204 (Engine Control System)
- Section 205 (Fuel System)
- Section 206 (Propeller Shaft)
- Section 207 (Rear Final Drive)
- Section 208 (Power Door Locks)
- Section 209 (Remote Keyless Entry)
- Section 210 (Vehicle Security (Theft Warning) System)
- Section 211 (Electronic Key & Immobilizer Systems)
- Section 212 (Engine Mechanical - 2.5L)
- Section 213 (Engine Mechanical - 3.5L)
- Section 214 (Exhaust System)
- Section 215 (Tires, Wheels & Tire Pressure Monitoring System (TPMS))
- Section 216 (Hood)
- Section 217 (Combination Meters)
- Section 218 (Warning Lamps)
- Section 219 (A/T Indicator)
- Section 220 (Can)
- Section 221 (Exterior & Interior)
- Section 222 (Battery)
- Section 223 (Headlamp (For USA))
- Section 224 (Headlamp (For CANADA) - Daytime Light System)
- Section 225 (General Information)
- Section 226 (Headlamp Switch And Turn Signal Switch)
- Section 227 (Air Conditioning)
- Section 228 (Propeller Shaft)
- Section 229 (Steering System)
- Section 230 (Power Tilt And Power Telescopic Steering Column)
- Section 231 (Air Conditioning System)
- Section 232 (Abs)
- Section 233 (Alignment Specifications & Procedures)
- Section 234 (General Information)
- Section 235 (Engine Lubrication System - 2.5L)
- Section 236 (Engine Cooling System - 2.5L)
- Section 237 (Exhaust System - 2.5L)
- Section 238 (Clutch)
- Section 239 (Manual Transmission)
- Section 240 (Automatic Transmission)
- Section 241 (Road Wheels & Tires)
- Section 242 (Power Steering Gear And Linkage)
- Section 243 (Seat Belt System)
- Section 244 (Power Door Lock System)
- Section 245 (Remote Keyless Entry System)
- Section 246 (Trunk Lid Opener)
- Section 247 (Power Window System)
- Section 248 (Rear Window Defogger)
- Section 249 (Sun Roof)
- Section 250 (Exterior Trim & Interior Trim)
- Section 251 (Instrument Panel)
- Section 252 (Seat System)
- Section 253 (Automatic Air Conditioner)
- Section 254 (Power Supply Routing Circuit)
- Section 255 (IPDM E/R (Intelligent Power Distribution Module Engine Room))
- Section 256 (Ground Circuit)
- Section 257 (Combination Meters)
- Section 258 (Warning System - Warning Lamps)
- Section 259 (BCM (Body Control Module))
- Section 260 (Can System)
- Section 261 (Audio System, Visual System & Telephone System)
- Section 262 (Manual Air Conditioner)
- Section 263 (General Information)
- Section 264 (Engine Mechanical)
- Section 265 (Engine Cooling System)
- Section 266 (Exhaust System)
- Section 267 (Clutch System)
- Section 268 (Manual Transaxle)
- Section 269 (Transfer Case - ATX14A)
- Section 270 (Driveshaft)
- Section 271 (Front Final Drive)
- Section 272 (Abs)
- Section 273 (Body & Trim)
- Section 274 (Harness Connector)
- Section 275 (Power Supply Routing)
- Section 276 (Headlamp (For USA))
- Section 277 (Headlamp (For CANADA) Daytime Light System)
- Section 278 (Parking License & Tail Lamps)
- Section 279 (Meters And Gauges)
- Section 280 (Warning System - Warning Lamps)
- Section 281 (Audio System)
- Section 282 (Power Sunroof)
- Section 283 (Vehicle Security (Theft Warning) System)
- Section 284 (Can Communication)
- Section 285 (Wiper System & Washer System & Horn System)
- Section 286 (Automatic Transmission)
- Section 287 (Engine Lubrication System - 3.5L)
- Section 288 (Engine Cooling System - 3.5L)
- Section 289 (Exhaust System - 3.5L)
- Section 290 (Anti-Lock Brake System & Traction Control System - Abs/TCS)
- Section 291 (Standard Bolt)
- Section 292 (Automatic Transmission (Service Specifications))
- Section 293 (Engine Control System - Diagnosis)
- Section 294 (Electronic Modulated Suspension - Diagnosis)
- Section 295 (Abs W/ EBD - Diagnosis)
- Section 296 (Abs W/EBD & BA & TRAC & VSC System - Diagnosis)
- Section 297 (Automatic Transaxle - Diagnosis)
- Section 298 (Air Conditioning System - Diagnosis)
- Section 299 (Lighting System - Diagnosis)
- Section 300 (Wiper & Washer - Diagnosis)
- Section 301 (Audio System - Diagnosis)
- Section 302 (Power Window Control System - Diagnostics)
- Section 303 (Power Mirror Control System - Diagnosis)
- Section 304 (Combination Meter - Diagnosis)
- Section 305 (Front Power Seat Control System (With Memory) - Diagnosis)
- Section 306 (Power Door Lock - Diagnosis)
- Section 307 (Wireless Door Lock - Diagnosis)
- Section 308 (Luggage Compartment Door Opener System - Diagnosis)
- Section 309 (Key Unlock Warning System - Diagnosis)
- Section 310 (Engine Immobilizer System - Diagnosis)
- Section 311 (Theft Deterrent System - Diagnosis)
- Section 312 (Multiplex Communication System - Diagnosis)
- Section 313 (Can Communication System - Diagnosis)
- Section 314 (Cruise Control System - Diagnosis)
- Section 315 (Engine Control System)
- Section 316 (Fuel System)
- Section 317 (Emission Control System)
- Section 318 (Intake Air Control System)
- Section 319 (Engine (Mechanical))
- Section 320 (Engine Exhaust Assembly)
- Section 321 (Cooling System)
- Section 322 (Lubrication System)
- Section 323 (Ignition System)
- Section 324 (Wheel Alignment)
- Section 325 (Abs Brake Sensors/Actuators)
- Section 326 (Automatic Transaxle (On-Vehicle Service))
- Section 327 (Steering Column)
- Section 328 (Power Steering)
- Section 329 (Heater & Air Conditioner)
- Section 330 (Instrument Panel/Meter)
- Section 331 (Theft Deterrent Systems)
- Section 332 (Sliding Roof System)
- Section 333 (Cruise Control)
- Section 334 (Engine Hood/Door (Service Specifications))
- Section 335 (Steering Column)
- Section 336 (Headlight Dimmer Switch)
- Section 337 (Audio & Visual System)
- Section 338 (Instrument Panel/Meter)
- Section 339 (Rear Seat)
- Section 340 (Front Door)
- Section 341 (Rear Door)
- Section 342 (Introduction)
- Section 343 (Automatic Transmission (Service Specifications))
- Section 344 (Automatic Transmission - Diagnosis)
- Section 345 (Power Tilt & Telescopic Steering Column - Diagnosis)
- Section 346 (Power Seat Control System - Diagnosis)
- Section 347 (Rear Left Seat Control System - Diagnosis)
- Section 348 (Rear Right Seat Control System - Diagnosis)
- Section 349 (Rear Seat Switch System - Diagnosis)
- Section 350 (Theft Deterrent System - Diagnosis)
- Section 351 (Cruise Control System - Diagnosis)
- Section 352 (Engine Immobilizer System - Diagnosis)
- Section 353 (Combination Meter System - Diagnosis)
- Section 354 (Combination Switch Control System - Diagnosis)
- Section 355 (Steering Pad Switch System - Diagnosis)
- Section 356 (Rain Sensor System - Diagnosis)
- Section 357 (Sliding Roof - Diagnosis)
- Section 358 (Driver Side Junction Block (Body No. 2 Control System) - Diagnosis)
- Section 359 (Passenger Side Junction Block (Body No. 3 ) Control System - Diagnosis)
- Section 360 (Luggage Room Junction Block (Body No. 4) Control System - Diagnosis)
- Section 361 (Front Light (Body No. 5) Control System - Diagnosis)
- Section 362 (Driver Door Control System - Diagnosis)
- Section 363 (Passenger Door Control System - Diagnosis)
- Section 364 (Rear Left Door Control System - Diagnosis)
- Section 365 (Rear Right Door Control System - Diagnosis)
- Section 366 (Gateway System - Diagnosis)
- Section 367 (Audio System - Diagnosis)
- Section 368 (LEXUS Navigation System - Diagnosis)
- Section 369 (LEXUS Link System - Diagnosis)
- Section 370 (LEXUS Park Assist System - Diagnosis)
- Section 371 (Air Conditioning System - Diagnosis)
- Section 372 (Troubleshooting)
- Section 373 (Power Source)
- Section 374 (Ignition Switch & Key Unlock Warning Switch)
- Section 375 (Headlight & Taillight System)
- Section 376 (Headlight Beam Level Control System)
- Section 377 (Fog Light System)
- Section 378 (Turn Signal & Hazard Warning System)
- Section 379 (Illumination Light System)
- Section 380 (Interior Light System)
- Section 381 (Stop Light System)
- Section 382 (Headlight Cleaner System)
- Section 383 (Wiper & Washer System)
- Section 384 (Combination Meter)
- Section 385 (Defogger System)
- Section 386 (Power Window Control System)
- Section 387 (Power Door Lock Control System)
- Section 388 (Wireless Door Lock Control System)
- Section 389 (Power Seat Control System)
- Section 390 (Power Mirror Control System)
- Section 391 (Power Shoulder Belt Anchorage System)
- Section 392 (Electro Chromic Mirror System)
- Section 393 (Climate Control Seat System)
- Section 394 (Fuel Lid Opener System)
- Section 395 (Door Closer System)
- Section 396 (Luggage Compartment Door Closer System)
- Section 397 (LEXUS Park Assist System)
- Section 398 (Rear Sunshade System)
- Section 399 (Clock)
- Section 400 (Overhead Junction Block)
- Section 401 (Garage Door Opener System)
- Section 402 (Horn System)
- Section 403 (Sliding Roof - Removal & Installation)
- Section 404 (Instrument Panel)
- Section 405 (Rear Seat (Fixed Type))
- Section 406 (Rear Seat (Power Adjuster Type))
- Section 407 (Seat Belt)
- Section 408 (Seat Belt PRETENSIONER (Front))
- Section 409 (Seat Belt PRETENSIONER (Rear))
- Section 410 (Seat Heater System)
- Section 411 (Fuel System)
- Section 412 (Starting System)
- Section 413 (Charging System)
- Section 414 (Seat Belt System)
- Section 415 (Shift Lock System)
- Section 416 (O/D Direct Clutch Speed Sensor)
- Section 417 (ATF Oil Temperature Sensor)
- Section 418 (Automatic Transmission Unit (Removal & Installation))
- Section 419 (Front Axle)
- Section 420 (Introduction)
- Section 421 (Tire & Wheel)
- Section 422 (Seat Belt)
- Section 423 (Lighting)
- Section 424 (Power Window Control System)
- Section 425 (Mirrors)
- Section 426 (Seats)
- Section 427 (Doors)
- Section 428 (Bumpers)
- Section 429 (Engine Exhaust Assembly)
- Section 430 (Exterior/Interior Trim)
- Section 431 (Firing Order & Cylinder Identification)
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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