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.
2018 Lexus GS 350 Base, AWDFACTORY OEM SERVICE PROCEDURE
External Pages
These are pages that do not belong to the exact selected vehicle (2018 Lexus GS 350 Base, AWD), 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 variant/trim
- Section 1 (Automatic Transmission (Aa81E) - Diagnostics - Introduction)
- Section 2 (Automatic Transmission - Service Information (Aa81E) (1 Of 2))
- Section 3 (Automatic Transmission (Aa81E) - Diagnostic Codes (4 Of 4) & Circuit Tests)
- Section 4 (Automatic Transmission (Aa81E) - Diagnostic Codes (3 Of 4))
- Section 5 (Automatic Transmission - Service Information (Aa81E) (2 Of 2))
- Section 6 (Automatic Transmission (Aa81E) - Diagnostic Codes (2 Of 4))
- Section 7 (Automatic Transmission (Aa81E) - Diagnostic Codes (1 Of 4))
- Different car
- Section 1 (Starting System (Service Specifications))
- Section 2 (Engine Control System - Diagnostics - Introduction (1 Of 3))
- Section 3 (Engine Control System - Service Information)
- Section 4 (Engine Control System - Diagnostics & Circuit Tests)
- Section 5 (Automatic Transmission (Aa81E) - Diagnostics - Introduction)
- Section 6 (Charging System - Diagnostics - Introduction)
- Section 7 (Engine Lubrication System - Service Information)
- Section 8 (Fuel System - Service Information)
- Section 9 (Engine Cooling System (Inspection))
- Section 10 (Engine Control System - Diagnostic Codes (2 Of 4))
- Section 11 (Engine Control System - Diagnostics - Introduction)
- Section 12 (Engine Control System - Diagnostic Codes (4 Of 4) & Circuit Tests)
- Section 13 (Emission Control System (Inspection))
- Section 14 (Engine Intake System) (Inspection))
- Section 15 (Engine Control System - Service Information)
- Section 16 (Engine Control System - Diagnostic Codes (1 Of 4))
- Section 17 (Fuel System - Inspection)
- Section 18 (Fuel System - Service Information)
- Section 19 (Ignition System (Inspection))
- Section 20 (Engine Mechanical - Service Information)
- Section 21 (Intake / Exhaust System - Service Information)
- Section 22 (Emission Control System (Service Information))
- Section 23 (Engine Cooling System - Service Information)
- Section 24 (Engine Cooling System - Service Information)
- Section 25 (Engine Cooling System (Inspection))
- Section 26 (Engine Mechanical - Service Information)
- Section 27 (Intake / Exhaust System - Service Information)
- Section 28 (Engine Control System - Diagnostic Codes (1 Of 5))
- Section 29 (Engine Control System - Diagnostics - Introduction (2 Of 3))
- Section 30 (Engine Control System - Diagnostics - Introduction (3 Of 3))
- Section 31 (Engine Control System - Diagnostic Codes & Symptom Tests)
- Section 32 (Engine Control System - Diagnostic Codes (5 Of 5))
- Section 33 (Engine Control System - Diagnostic Codes (3 Of 5))
- Section 34 (Fuel System - Inspection)
- Section 35 (Engine Intake System (Inspection))
- Section 36 (Starting System - Service Information)
- Section 37 (Engine Cooling System - Diagnostics & Circuit Tests)
- Section 38 (Charging System - Service Information)
- Section 39 (Automatic Transmission (Aa81E) - Diagnostic Codes (1 Of 2) & Circuit Tests)
- Section 40 (Automatic Transmission (Aa81E) - Diagnostic Codes (1 Of 3))
- Section 41 (Charging System - Diagnostics & Symptom Tests)
- Section 42 (Emission Control System - Service Information)
- Section 43 (Engine Lubrication (System) (Inspection))
- Section 44 (Starting System - Service Information)
- Section 45 (Automatic Transmission (A760H) - Diagnostics - Introduction)
- Section 46 (Automatic Transmission (Aa81E) - Diagnostics - Introduction)
- Section 47 (Automatic Transmission (Aa81E) - Diagnostic Codes (2 Of 2))
- Section 48 (Ignition System (Inspection))
- Section 49 (Engine Control System - Diagnostic Codes (3 Of 4))
- Section 50 (Charging System - Diagnostics & Symptom Tests)
- Section 51 (Engine Control System - Diagnostic Codes (2 Of 5))
- Section 52 (Engine Control System - Diagnostic Codes (4 Of 5))
- Section 53 (Engine Control System - Diagnostics & Symptom Tests)
- Section 54 (Generator - Service Information)
- Section 55 (Automatic Transmission (Aa81E) - Diagnostic Codes (3 Of 3) & Circuit Tests)
- Section 56 (Engine Cooling System - Diagnostics & Circuit Tests)
- Section 57 (Automatic Transmission (A760H) - Diagnostic Codes & Circuit Tests)
- Section 58 (Engine Lubrication System (Inspection))
- Section 59 (Engine Lubrication System - Service Information)
- Section 60 (Emission Control System (Inspection))
- Section 61 (Automatic Transmission (Aa81E) - Diagnostic Codes (2 Of 3))
- Section 62 (Charging System (Service Specifications))
- Section 63 (Starting System (Inspection))
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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