Hyundai Elantra (CN7) 2021-2025 Service Manual

This service manual for the 2021 Hyundai Elantra (CN7) is your go-to resource for everything you need to maintain, service, and repair your Elantra with precision. Covering all major systems — engine and fuel systems, transmission, suspension, brakes, electrical and electronic systems, body and interior elements — the manual delivers detailed diagnosis instructions, assembly/disassembly procedures, maintenance schedules and technical specifications. Whether you are doing routine maintenance or deeper system checks, the step-by-step guides and technical data ensure that work is done correctly and safely.

By following the guidelines in the manual, owners and mechanics can preserve the performance, safety, and longevity of the vehicle. Regular maintenance as described — checking fluids, inspection of brake, steering, suspension and emissions systems, tire condition, and electrical components — helps prevent wear and avoid unexpected breakdowns. Proper documentation of services also helps maintain warranty coverage and ensures reliability over time.

• General Information
1. General Tightening Torque Table. General information
2. Important Safety Notice. General information
3. Identification Numbers. General information
4. Warning and Caution Labels. General information
5. Lift and Support Points. General information
6. Towing. General information
7. Basic Service Symbols. General information
8. General Service Information. General information
• Engine Mechanical System
1. Specifications
2. Repair procedures
3. Troubleshooting
4. Special service tools
5. Engine And Transaxle Assembly
6. Drive Belt System
7. Timing System
8. Cylinder Head Assembly
9. Cylinder Block
10. Cooling System
11. Lubrication System
12. Intake And Exhaust System
• Engine Electrical System
1. Troubleshooting
2. Specifications
3. Special service tools
4. Ignition System
5. Charging System
6. Starting System
• Emission Control System
1. Description and operation
2. Components and components location
3. Troubleshooting
4. Specifications
5. Schematic diagrams
6. Evaporative Emission Control System
7. Exhaust Emission Control System
• Engine Control / Fuel System
1. Troubleshooting
2. Specifications
3. Special service tools
4. Engine Control System
5. Fuel Delivery System
• Clutch System
1. Troubleshooting
2. Specifications
3. Special service tools
4. Clutch System
• Manual Transaxle System
1. Troubleshooting
2. Specifications
3. Special service tools
4. Manual Transaxle System
5. Manual Transaxle Control System
• DCT(Dual Clutch Transmission) System
1. Specifications
2. Special service tools
3. Troubleshooting
4. Dual Clutch Transmission Assembly
5. Dual Clutch Transmission Control System
6. Dual Clutch System
• Driveshaft and axle
1. Troubleshooting
2. Specifications
3. Special service tools
4. Front Axle Assembly. Front Hub / Knuckle / Tone Wheel
5. Driveshaft Assembly
6. Rear Axle Assembly. Rear Hub - Carrier
• Suspension System
1. Troubleshooting
2. Specifications
3. Special service tools
4. Front Suspension System
5. Rear Suspension System
6. Tires/Wheels
7. Tire Pressure Monitoring System
• Steering System
1. Troubleshooting
2. Specifications
3. Special service tools
4. Repair procedures
5. Steering Wheel (Heated Steering Wheel)
6. Motor Driven Power Steering
• Restraint
1. General safety information and caution
2. Description and operation
3. Specifications
4. Special service tools
5. Repair procedures
6. SRSCM
7. Airbag Module
8. Seat Belt Pretensioner. Seat Belt Pretensioner (BPT)
• Brake System
1. Troubleshooting
2. Specifications
3. Special service tools
4. Brake bleeding procedures
5. Brake System
6. Parking Brake System
7. ESC (Electronic Stability Control) System
8. ABS(Anti-Lock Brake System)
• Body (Interior and Exterior)
1. Troubleshooting
2. Specifications
3. Special service tools
4. Fender
5. Hood
6. Trunk Lid
7. Fuel Filler Door
8. Front Door
9. Rear Door
10. Body Side Molding
11. Sunroof
12. Mirror
13. Cowl Top Cover
14. Floor Console
15. Crash Pad
16. Roof Trim
17. Interior Trim
18. Windshield Glass
19. Rear Window Glass
20. Floor Carpet. Repair procedures
21. Front Bumper
22. Rear Bumper
23. Front Seat
24. Rear Seat
25. Front Seat Belt
26. Rear Seat Belt
• Body Electrical System
1. General information
2. Special service tools
3. Multifunction Switch
4. Horn
5. Audio
6. AVN System
7. Emergency Call System
8. Smart Key System
9. Keyless Entry And Burglar Alarm
10. Integrated Body Control Unit (IBU)
11. IMS(Integrated Memory System)
12. Seat Electrical
13. Fuses And Relays
14. Indicators And Gauges
15. Power Door Locks
16. Power Door Mirrors
17. Power Windows
18. Rear Glass Defogger
19. Windshield Wiper/Washer
20. Electro Chromic Inside Rear View Mirror
21. Sun Roof
22. Lighting System
23. Auto Lighting Control System
24. Head Lamp Leveling Device
25. Button Engine Start System
26. Immobilizer System
27. Ignition Switch Assembly. Repair procedures
28. Wireless Power Charger System
• Heating, Ventilation and Air Conditioning
1. Troubleshooting
2. Specifications
3. Special service tools
4. Air Conditioning System
5. Heater
6. Blower
7. Controller
• Advanced Driver Assistance System (ADAS)
1. Special service tools
2. Description and operation
3. Front View Camera System
4. Front Radar System
5. Cruise Control System (CC)
6. Rear Corner Radar System
7. Parking Distance Warning (PDW)
8. Rear View Monitor (RVM)
9. Driver Parking Assistance System