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.
2021 Lexus UX 250h BaseFACTORY OEM SERVICE PROCEDURE
External Pages
These are pages that do not belong to the exact selected vehicle (2021 Lexus UX 250h Base), 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 (Electronically Controlled Brake System (Diagnostics - Introduction) (Except Hybrid))
- Section 2 (Can Communication System (Diagnostics - Introduction) (2 Of 5) (Except Hybrid))
- Section 3 (Can Communication System (Diagnostics - Introduction) (3 Of 5) (Except Hybrid))
- Section 4 (Can Communication System (Diagnostics - Introduction) (1 Of 5) (Except Hybrid))
- Section 5 (Smart Access System W/ Push-Button Start (Start Function) (Diagnostics - Introduction) (Except Hybrid))
- Section 6 (Electric Parking Brake System (Diagnostics - Introduction) (Except Hybrid))
- Section 7 (Electric Parking Brake System (Diagnostic Codes & Circuit Tests) (Except Hybrid))
- Section 8 (Air Conditioning System (Diagnostic Codes & Symptom Tests) (Except Hybrid))
- Section 9 (Electronically Controlled Brake System (Diagnostic Codes) (1 Of 2) (Except Hybrid))
- Section 10 (Electronically Controlled Brake System (Diagnostic Codes (2 Of 2) & Circuit Tests) (Except Hybrid))
- Section 11 (Engine Control System (SFI) (M20A-FKS) - Diagnostics - Introduction (1 Of 3))
- Section 12 (Continuously Variable Transaxle (CVT) System (K120) (Diagnostic Codes) (1 Of 2))
- Section 13 (Continuously Variable Transaxle (CVT) System (K120) (Diagnostics - Introduction))
- Section 14 (Continuously Variable Transaxle (CVT) System (K120) (Service Information) (2 Of 2))
- Section 15 (Engine Control System (M20A-FKS) (Service Information))
- Section 16 (Continuously Variable Transaxle (CVT) System (K120) (Service Information) (1 Of 2))
- Section 17 (Continuously Variable Transaxle (CVT) System (K120) (Diagnostic Codes) (2 Of 2) & Circuit Tests))
- Section 18 (Engine Mechanical (M20A-FKS) (Service Information))
- Section 19 (Starting System (M20A-FKS) (Service Information))
- Section 20 (Intake System / Exhaust System (M20A-FKS) (Service Information))
- Section 21 (Engine Cooling System (M20A-FKS) (Service Information))
- Section 22 (Engine Cooling System (M20A-FKS) (Inspection))
- Section 23 (Engine Control System (SFI) (M20A-FKS) - Diagnostic Codes (2 Of 6))
- Section 24 (Engine Control System (SFI) (M20A-FKS) - Diagnostic Codes (1 Of 6))
- Section 25 (Engine Control System (SFI) (M20A-FKS) - Diagnostics - Introduction (2 Of 3))
- Section 26 (Engine Control System (SFI) (M20A-FKS) - Diagnostics - Introduction (3 Of 3))
- Section 27 (Lubrication System (M20A-FKS) (Service Information))
- Section 28 (Emission Control System (M20A-FKS) (Service Information))
- Section 29 (Fuel System (M20A-FKS) (Service Information))
- Section 30 (Intake System / Exhaust System (M20A-FKS) (Inspection))
- Section 31 (Fuel System (M20A-FKS) (Inspection))
- Section 32 (Ignition System (M20A-FKS) (Inspection))
- Section 33 (Can Communication System (Diagnostics - Introduction) (5 Of 5) (Except Hybrid))
- Section 34 (Smart Access System W/ Push-Button Start (Entry Function) (Diagnostics - Introduction) (Except Hybrid))
- Section 35 (Battery / Charging System (M20A-FKS) (Service Information))
- Section 36 (Cooling Fan System (M20A-FKS) (Diagnostics & Circuit Tests))
- Section 37 (Engine Control System (SFI) (M20A-FKS) - Diagnostic Codes (6 Of 6) & Symptom Tests (1 Of 2))
- Section 38 (Smart Access System W/ Push-Button Start (Start Function) (Diagnostic Codes & Symptom Tests (1 Of 2)) (Except Hybrid))
- Section 39 (Air Conditioning System (Diagnostics - Introduction) (Except Hybrid))
- Section 40 (Engine Control System (SFI) (M20A-FKS) - Diagnostic Codes (3 Of 6))
- Section 41 (Engine Control System (SFI) (M20A-FKS) - Diagnostic Codes (4 Of 6))
- Section 42 (Engine Control System (SFI) (M20A-FKS) - Diagnostic Codes (5 Of 6))
- Section 43 (Dynamic Radar Cruise Control System (Diagnostic Codes & Circuit Tests) (Except Hybrid))
- Section 44 (Charging System (M20A-FKS) (Diagnostic Codes & Symptom Tests))
- Section 45 (Smart Access System W/ Push-Button Start (Start Function) (Symptom Tests) (2 Of 2) (Except Hybrid))
- Section 46 (Smart Access System W/ Push-Button Start (Entry Function) (Diagnostic Codes & Symptom Tests) (Except Hybrid))
- Section 47 (Can Communication System (Diagnostics - Introduction) (4 Of 5) (Except Hybrid))
- Section 48 (Can Communication System (Diagnostic Codes & Symptom Tests (1 Of 2)) (Except Hybrid))
- Section 49 (Can Communication System (Symptom Tests) (2 Of 2) (Except Hybrid))
- Section 50 (Dynamic Radar Cruise Control System (Diagnostics - Introduction) (Except Hybrid))
- Section 51 (Brake System (Inspection) (Except Hybrid))
- Section 52 (Lubrication System (M20A-FKS) (Inspection))
- Section 53 (Charging System (M20A-FKS) (Diagnostics - Introduction))
- Section 54 (Engine Control System (SFI) (M20A-FKS) - Symptom Tests (2 Of 2))
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:
- • 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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