Official 2025 Sonata OEM Repair Guide – PDF/USB for Mechanics & DIY Repairs

2025 Hyundai Sonata Factory Service & Repair Manual – Full OEM Maintenance & Diagnostic Guide

Take full control of your 2025 Hyundai Sonata’s reliability, performance, and long-term value with this official OEM factory service and repair manual. Covering the entire 2025 model lineup—including the 2.5L Smartstream engine, the 1.6L Turbo, and the Sonata Hybrid—this manual provides professional-grade repair procedures, factory wiring diagrams, and complete diagnostic workflows.

Whether you’re addressing an electrical fault, completing scheduled maintenance, or working through a hybrid system issue, this guide gives you the same tools trusted by Hyundai technicians at the dealership.

Available now as a PDF download or shipped on a USB flash drive, optimized for offline use in the shop or garage.

🔧 Engine Service & Maintenance – 2.5L, 1.6L Turbo & Hybrid Powertrains

This manual includes complete instructions for servicing the full 2025 Sonata engine range:

• Timing chain inspection, camshaft position sensor testing, and torque values

• Turbocharger servicing, wastegate adjustment, and boost pressure diagnostics

• Hybrid battery cooling system flush, inverter replacement, and motor-generator diagnostics

• Direct injection system cleaning, fuel pump testing, and intake manifold procedures

• Oil change specs, cooling system flushing, thermostat testing, and belt routing

• Check engine light diagnostics using OBD-II codes, freeze-frame data, and real-time sensor data

Includes every factory-approved procedure, with step-by-step diagrams and troubleshooting flowcharts.

⚙️ Transmission & Drivetrain Coverage

Covers both the 8-speed automatic transmission and the hybrid’s electronically controlled system:

• ATF drain/refill, filter servicing, and pan resealing

• Shift solenoid testing, TCM reset procedures, and fluid pressure testing

• CVT or ECVT inspection (for hybrid trims), input/output speed sensor diagnostics

• Drive axle servicing, wheel bearing replacement, and differential maintenance

• Gear selector calibration, shift linkage adjustments, and clutch pack wear checks

Includes transmission diagnostics, relearn procedures, and troubleshooting charts.

🔋 Electrical System & Hybrid Diagnostics

Stay ahead of electrical faults and hybrid-specific issues with full electrical support:

• Factory wiring diagrams for ADAS, climate control, powertrain, and infotainment

• Hybrid system diagnostics, high-voltage safety procedures, and battery inspection

• ADAS calibration guides for lane assist, smart cruise control, and collision avoidance systems

• Battery, alternator, and starter testing with waveforms and voltage thresholds

• Infotainment unit diagnostics, display replacement, and firmware update procedures

• Sensor testing, ECU pinouts, CAN bus diagrams, and module replacement procedures

Works perfectly with standard scan tools and includes full OBD-II code index with solutions.

🛞 Brakes, Suspension & Steering

Modern comfort and safety rely on properly maintained chassis components. This manual includes:

• ABS and ESC system diagnostics, wheel speed sensor testing, and module replacement

• Front and rear brake service, including pad replacement, caliper servicing, and rotor specs

• Electric power steering motor diagnostics, rack and pinion torque specs, and alignment specs

• Strut assembly replacement, control arm bushing service, and ride height measurements

• Noise and vibration troubleshooting using factory NVH flowcharts and inspection routines

Ensure a smooth, responsive, and safe driving experience with precision repair methods.

✅ Why Buy the 2025 Hyundai Sonata Repair Manual?

• Official Hyundai OEM content – the exact data used by dealership mechanics

• Covers every trim level including hybrid, turbocharged, and base engines

• Includes engine, transmission, electrical, ADAS, infotainment, braking, and climate systems

• Instantly available as a PDF download or shipped USB flash drive

• Essential for dealership techs, professional repair shops, and serious DIYers

• Features factory diagnostic trees, pinout diagrams, torque specs, and service intervals

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