1. Product Overview
The NEXPEAK K1 ULTRA is a professional automotive scanner designed for comprehensive vehicle diagnosis. It offers full system diagnosis, various maintenance functions, and is compatible with a wide range of car brands. The device features a latest K-Series VCI design for faster and more stable operation.

Figure 1: NEXPEAK K1 ULTRA Device
2. Key Features
- Extensive Vehicle Coverage: Supports over 160 major automakers worldwide with continuous updates.
- Multi-language Support: Available in English, Spanish, French, Portuguese, Russian, Italian, Japanese, German, Hungarian, Dutch, Chinese, Polish, and Korean.
- Full System Diagnosis: Capable of diagnosing all electronic control systems including ECM, TCM, ABS, SRS, BCM, IMM, BMS, TPMS, SAS, fuel system, lighting system, and wiper system.
- 13 Maintenance Functions: Includes ABS Bleed, Battery Match, DPF Regeneration, EPB Reset, Injector Coding, Oil Service Reset, TPMS Reset, SAS Reset, TPS, Immokey, CVT Learning, Gear Learning, and Odometer Management.
- Full OBD II & EOBD Functions: Provides comprehensive OBD2 diagnostic capabilities.
- Real-time Data: Offers live data stream graphing and data logging.
- Diagnostic Report: Allows printing and sharing of vehicle health reports.
- Remote Diagnosis: Supports remote assistance for diagnostics.
- Compatibility: Designed for use with Android phones and tablets.
- Lifetime Free Updates: Software updates are free for life.
3. Setup Guide
3.1. App Download and Installation
- Download Software: Download the NEXPEAK application from the official NEXPEAK website (https://www.nexpeaktech.com/service/Download-Center.html) to your Android phone. For iOS users, search for "NexzDAS" in the App Store.
- Install App: Follow the on-screen instructions to install the application.

Figure 2: NEXPEAK Official Download Center

Figure 3: NexzDas App on App Store
3.2. Account Registration and Product Binding
- Register Account: Open the NEXPEAK APP. Register an account using your email address and set up your login password.
- Verification: Fill in the verification code received in your email.
- Bind Product: Bind the serial number and activation code found on the product's paper documentation to your account.
- Access Main Page: Click the "arrow" to enter the diagnosis main page.

Figure 4: App Registration and Product Binding Steps
3.3. Hardware Connection
- Connect VCI: Connect the K1 ULTRA VCI (Vehicle Communication Interface) to your car's OBD port.
- Ignition On: Turn on the car's ignition (engine off).
- Open App: Open the NEXPEAK APP on your Android device. The VCI should connect successfully, indicated by three lights turning on.
Video 1: NEXPEAK K1 ULTRA Setup and Usage Demonstration
3.4. Download Vehicle Data
After successful connection, navigate to the App Store within the NEXPEAK application to download the necessary vehicle data for your car models. You can select specific brands or choose to download all available data.

Figure 5: NEXPEAK App Interface
4. Operating Instructions
4.1. Full System Diagnosis
The Diagnostics application allows you to link to the electronic control system of your vehicle for comprehensive diagnosis. It performs functional tests and retrieves diagnostic information such as trouble codes, event codes, and live data for various vehicle control systems.

Figure 6: Full System Diagnosis Capabilities
4.2. Full OBD2 Functions
The K1 ULTRA supports all standard OBD2 functions:
- Read Codes: Retrieve current, pending, and permanent diagnostic trouble codes (DTCs).
- Clear Codes: Erase detected fault codes and turn off the Check Engine Light.
- Live Data: View graphical live data streams from the vehicle's computer modules.
- Freeze Frame: View vehicle operating parameters at the moment a DTC is detected.
- I/M Readiness: Check the vehicle's inspection and maintenance readiness status.
- O2 Sensor Test: Perform O2 sensor tests to check fuel efficiency and emissions.
- On-Board Monitoring Test: Read results of on-board diagnostic monitoring tests for specific components/systems.
- Vehicle Information: Retrieve VIN, CINs, and CVNs.
- Component Test: Initiate a leak test for the vehicle's EVAP system.

Figure 7: OBDII Functions Interface
4.3. Special Functions
The device offers 13 special maintenance functions:

Figure 8: 13 Special Functions
- ABS BLEED: For bleeding the ABS system.
- BATTERY: For battery matching/registration.
- DPF: For Diesel Particulate Filter regeneration.
- EPB: For Electronic Parking Brake reset.
- INJECTOR: For injector coding.
- OIL RESET: For oil service light reset.
- TPMS: For Tire Pressure Monitoring System reset.
- SAS: For Steering Angle Sensor calibration.
- TPS: For Throttle Position Sensor reset.
- IMMOKEY (Key Programming): For immobilizer and key programming functions.
- CVT: For Continuously Variable Transmission learning.
- GEAR LEARN: For gear learning/adaptation.
- ODOMETER: For odometer management/adjustment.
4.4. Key Programming
This function supports various key-related operations:
- Immo Code Reading: Read immobilizer codes for specific car models.
- Key Programming: Supports key matching and adaptation.
- Add Car Key: Add and match new keys to the vehicle.
- Erase Car Key: Delete unwanted keys from the vehicle's memory.
- Key Information Reading: Read key information such as quantity and frequency.
- All Key Lost: Supports direct OBD matching for most cars when all keys are lost.

Figure 9: Key Programming Interface
4.5. Odometer Adjustment
The device provides functionality for odometer management and adjustment, allowing you to clear dashboard data.

Figure 10: Odometer Adjustment Interface
4.6. Active Test (Bi-directional Control)
This function allows you to test whether specific execution components in the electronic control system are working correctly. It supports ECU coding functions for many brands and quick diagnosis via one-key VIN scanning.
Examples of drive test menu items include: A/C compressor clutch relay, automatic start/stop, camshaft position actuator system, cooling fan, engine oil pressure control solenoid valve, EVAP system, fuel system, heater coolant pump, dashboard indication, engine/service compartment test, active grille air shutter system, auxiliary coolant pump, compression test, engine control ignition relay, engine speed and throttle, fuel control circuit status, generator L-terminal, ignition timing, oxygen sensor heating actuator, starter pinion electromagnetic actuator relay, etc.

Figure 11: Active Test Functionality
4.7. Diagnostic Report Sharing and Printing
Diagnostic reports generated by the K1 ULTRA can be easily printed or shared via Bluetooth to other devices like a PC or printer.

Figure 12: Diagnostic Report Sharing Options
5. Maintenance
5.1. Software Updates
The NEXPEAK K1 ULTRA offers one-click software updates, which are free for life. Ensure your device is connected to the internet to receive the latest updates and vehicle data.

Figure 13: Software Update Interface
6. Troubleshooting
- System Compatibility: Not all diagnostic functions may work for every car model or system. For example, if your car does not support airbag system diagnosis, it is not a quality problem with the tool but rather a compatibility limitation with that specific vehicle's system.
- Device Compatibility: The NEXPEAK K1 ULTRA is currently only compatible with Android devices.
- Connection Issues: Ensure the VCI is securely connected to the car's OBD port and the car's ignition is turned on. Check that the three indicator lights on the VCI are illuminated after connection.
- App Issues: If experiencing issues with the app, ensure it is updated to the latest version.
7. Specifications
| Feature | Specification |
|---|---|
| Brand Name | NEXPEAK |
| Model Name | K1 ULTRA |
| Item Type | Engine Analyzer |
| Material | Plastic + Alloy |
| Software Version | V12.6 (Lifetime Free Updates) |
| Bluetooth Version | 5.2 |
| Special Features | Bluetooth, Full System Diagnosis, 13 Reset Services, Key Programming, Odometer Adjustment, Active Test |
| External Testing Certification | CE |
| Item Length | 19cm |
| Item Width | 14cm |
| Item Height | 6.5cm |
| Item Weight | 0.55kg |
| Supported Languages | English, Spanish, French, Portuguese, Russian, Italian, Japanese, German, Hungarian, Dutch, Chinese, Polish, Korean |
| Supported Car Brands | 160+ worldwide auto brands (America, Europe, Asia, China, Australia) |

Figure 14: K1 ULTRA vs K1 PLUS Comparison

Figure 15: Operational Functions

Figure 16: Supported Languages

Figure 17: Supported Car Brands (Part 1)

Figure 18: Supported Car Brands (Part 2)
8. User Tips
- The NEXPEAK K1 ULTRA is a diagnostic tool. The speed of repair for any identified issues will depend on the specific problem and the repair process itself.
- The device supports key programming, including for keyless entry systems, allowing you to add or erase keys and manage key information.
9. Frequently Asked Questions (FAQ)
- Q: What is the material quality of the NEXPEAK K1 ULTRA?
- A: The device is constructed from a combination of plastic and alloy for durability.
- Q: Until what year can this tool read vehicles?
- A: The NEXPEAK K1 ULTRA supports a wide range of vehicles, including older models, covering over 160 auto brands. Specific year ranges are dependent on the vehicle manufacturer and model, but it is designed for broad compatibility.
- Q: Can this device program keyless entry systems?
- A: Yes, the K1 ULTRA includes key programming functions that support key matching, adding new keys, erasing keys, and reading key information, which can include keyless entry systems.
10. Package Contents
- 1 x Special black storage box
- 1 x K1 ULTRA VCI (Vehicle Communication Interface)
- 1 x Adapter
- 1 x Product Manual

Figure 19: Product Packaging and Contents
11. Warranty and Support
The NEXPEAK K1 ULTRA comes with lifetime free software updates, ensuring your diagnostic tool remains current with the latest vehicle data and functionalities. For further support or inquiries, please refer to the official NEXPEAK website or contact their customer service.





