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.
External Pages
's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle. Different variant/trim Section 1 (Engine - Technical Data (N51)) Section 2 (Engine - Tightening Torques (N51)) Section 3 (Fuel System - Tightening Torques (N51)) Section 4 (Cooling System - Tightening Torques (N51)) Section 5 (Exhaust System - Tightening Torques (N51)) Section 6 (Engine - Special Tools (N51)) Section 7 (Engine - Repair (N51)) Section 8 (Engine Electrical System - Repair (N51)) Section 9 (Fuel System - Repair (N51)) Section 10 (Fuel Supply System - Repair (N51)) Section 11 (Cooling System - Repair (N51)) Section 12 (Exhaust System - Repair (N51)) Section 13 (General Electrical System - Repair (E82)) Section 14 (Collision - Body Panel Repair (E82)) Section 15 (Body Equipment - Repair (E82)) Section 16 (Seats - Repair (E82)) Section 17 (Sunroof - Repair) Section 18 (Airbag, Audio, Navigation And Anti-Theft - Repair - E82) Section 19 (Body Panel System - Tightening Torques (E82)) Section 20 (Body Equipment - Tightening Torques (E82)) Section 21 (Seats - Tightening Torques (E82)) Section 22 (Sunroof - Tightening Torques) Section 23 (General Electrical System - Tightening Torques (E82)) Section 24 (Airbag, Audio, Navigation And Anti-Theft - Tightening Torques - E82) Section 25 (Body Panel System - Special Tools (E82)) Section 26 (Body Equipment - Special Tools (E82)) Section 27 (General Electrical System - Special Tools (E82)) Section 28 (Collision - Body Dimensions (E82)) Different car Section 1 (Engine Controls - Service & Adjustment Specifications) Section 2 (Engine Controls - On-Vehicle Adjustments) Section 3 (Engine Controls - Basic Diagnostic Procedures - Except V12) Section 4 (Diagnostic Trouble Codes With Test Charts) Section 5 (Engine Controls - Trouble Shooting - No Codes) Section 6 (Engine Controls - System & Component Testing) Section 7 (Engine Controls - Removal, Overhaul & Installation - 1 Of 2) Section 8 (Engine Performance Wiring Diagrams) Section 9 (Abs/Traction Control - Repair (E46)) Section 10 (Specifications & Procedures) Section 11 (Differentials & Axle Shafts) Section 12 (Clutches - 5 Series (E39)) Section 13 (Servicing - M/T) Section 14 (Engine Controls - Specifications) Section 15 (Engine Controls - Adjustments - Except V12) Section 16 (Engine Performance Wiring Diagrams) Section 17 (Diagnostic Trouble Codes With Test Charts) Section 18 (Engine Controls - Basic Testing) Section 19 (Engine Controls - Tests W/O Codes) Section 20 (Engine Controls - System/Component Tests) Section 21 (Engine Controls - Remove/Install/Overhaul) Section 22 (Engine Controls - Service & Adjustment Specifications) Section 23 (Engine Controls - On-Vehicle Adjustments) Section 24 (Engine Controls - Basic Diagnostic Procedures) Section 25 (Engine Controls - Trouble Shooting - No Codes) Section 26 (Engine Controls - System & Component Testing) Section 27 (Engine Controls - Removal, Overhaul & Installation) Section 28 (Engine Performance Wiring Diagrams) Section 29 (Brakes - Repair) Section 30 (Electrical Component Locator) Section 31 (Electrical Component Locator) Section 32 (Electrical Component Locator - E36) Section 33 (Electrical Component Locator) Section 34 (Electrical Component Locator) Section 35 (Specifications & Drive Belt Routing) Section 36 (Steering Column - E36) Section 37 (Air Bag/SRS Component Inspection & Replacement Tables - EUROPEAN) Section 38 (Air Bag Restraint Systems) Section 39 (Electrical Component Locator) Section 40 (Electrical Component Locator) Section 41 (Electrical Component Locator) Section 42 (Electrical Component Locator) Section 43 (Electrical Component Locator) Section 44 (A/C-Heater System) Section 45 (Anti-Lock/Traction Control) Section 46 (Electrical Component Locator) Section 47 (Front/Rear Drive Axle - Repair (2WD & 4WD)) Section 48 (Axle Shafts - 5 Series) Section 49 (Suspension - Front) Section 50 (Disc - Z8) Section 51 (Front Axle - Repair - E46) Section 52 (Engine Controls - Basic Diagnostic Procedures) Section 53 (Diagnostic Trouble Codes With Test Charts) Section 54 (Engine Controls - Trouble Shooting - No Codes) Section 55 (Brakes - Repair) Section 56 (Axle Shafts - X5) Section 57 (Anti-Lock Brakes/Traction Control System - X5) Section 58 (Front Differentials) Section 59 (Air Bag Restraint Systems) Section 60 (Air Bag Restraint Systems) Section 61 (Air Bag Restraint Systems) Section 62 (Suspension - Front - Repair) Section 63 (Suspension - Front) Section 64 (Air Bag Restraint Systems) Section 65 (Air Bag Restraint Systems) Section 66 (Air Bag - Trouble Codes) Section 67 (Rear Suspension - Repair - E46) Section 68 (Engine Controls - Service & Adjustment Specifications) Section 69 (Engine Controls - On-Vehicle Adjustments) Section 70 (Engine Controls - Basic Diagnostic Procedures) Section 71 (Diagnostic Trouble Codes With Test Charts) Section 72 (Engine Controls - Trouble Shooting - No Codes) Section 73 (Engine Controls - System & Component Testing) Section 74 (Engine Controls - Pin Voltage Charts) Section 75 (Steering Column - Repair) Section 76 (Steering Column - Repair) Section 77 (Steering Column) Section 78 (Steering Column) Section 79 (Power Rack & Pinion - Repair) Section 80 (Power Rack & Pinion) Section 81 (Power Steering System - Repair) Section 82 (Steering - Repair) Section 83 (Air Bag Deactivation Procedures) Section 84 (Cabin Air Filter) Section 85 (Cabin Air Filter) Section 86 (Cabin Air Filter) Section 87 (Cabin Air Filter - E46) Section 88 (Electrical Component Locator) Section 89 (Electrical Component Locator) Section 90 (Diagnostic Trouble Codes With Test Charts) Section 91 (Diagnostic Trouble Codes With Test Charts) Section 92 (Diagnostic Trouble Codes With Test Charts (6-Cylinder)) Section 93 (Diagnostic Trouble Codes With Test Charts (V8 & V12)) Section 94 (Computer Relearn Procedures) Section 95 (Diagnostic Trouble Codes With Test Charts) Section 96 (Air Bag Restraint Systems) Section 97 (Air Bag Restraint Systems) Section 98 (Air Bag Restraint Systems) Section 99 (Air Bag Deactivation Procedures) Section 100 (Power Convertible Top - Z8) Section 101 (Specifications & Procedures) Section 102 (Axle Shafts (Front & Rear) - Repair) Section 103 (Cooling Fans) Section 104 (Generators & Regulators) Section 105 (Brakes - Repair) Section 106 (Brakes - Repair (E46)) Section 107 (Starter - Repair (2WD)) Section 108 (Starter - Repair) Section 109 (Starters) Section 110 (Cooling Fans - Repair (E46)) Section 111 (Starter) Section 112 (Specifications & Drive Belt Routing) Section 113 (Cabin Air Filter) Section 114 (Cabin Air Filter) Section 115 (Servicing - A/T) Section 116 (Manual Transmission - Servicing) Section 117 (Standard/Automatic Transmission - Overview) Section 118 (Removal & Installation - (A5S 440Z)) Section 119 (Removal & Installation - (A5S 325Z)) Section 120 (Transmission - Overview) Section 121 (Removal & Installation (A5S 325Z)) Section 122 (Automatic Transmission - Removal & Installation - X5 (A5S 440Z)) Section 123 (Automatic Transmission - Removal & Installation - A5S360R) Section 124 (Automatic Transmission - Removal & Installation - X5 (6HP26Z)) Section 125 (Manual Transmission - Removal & Installation (A5S 360R/390R)) Section 126 (Removal & Installation - (S5D 310Z/S5D 320Z)) Section 127 (Propeller Shaft - Repair) Section 128 (Removal & Installation (S5D 200G/S5D 250G/M52TU/M54)) Section 129 (Air Bag Restraint Systems) Section 130 (Air Bag Restraint Syst
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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