Top 5 All-in-one Car Key Programming and Diagnostic Tool Review

Looking for the best all-in-one car key programmer and diagnostic tool?

There are a vast variety of car key programmers with different specifications and functions. Asides choosing a key programmer based on what you will be using it for, most people would also consider the budget. You work for your money and it’s right for you to know what you’re paying for. We have prepared a comprehensive list of five unique key programmers for you to choose from.

1. Autel MaxiIM IM608 with XP400 Pro

Autel MaxiIM IM608 is the best all-in-one key programming and diagnostic scanner tool with a powerful IMMO function, O-E level full-system diagnostics and complete service function. Its features include an Android Operating System for fast boot-up and multi-tasking, a 10.1-inch LED touchscreen with a resolution of 1920×1200 for a clear display. It has a user-friendly interface coupled with a built-in 8-megapixel rear camera with autofocus and flashlight, Wi-Fi connectivity to access the internet, and a superb long lasting 15000 mAh battery.

Advanced XP400 Pro Key programming This sophisticated key programming and diagnostic tool comes with a XP400 Pro key programmer and a MaxiFlash JVCI for ECU programming.

The XP400 is designed to accurately read or write transponder data (including Mercedes Benz infrared smart key), ECU/MCU/EEPROM data (eg. 9S12 encryption chip), IC card, and the ability to detect remote frequency.

These tools allow you to program new keys, and also handle chip encryption. Furthermore, with Autel IM608 Pro, it is possible to perform key programming and vehicle diagnosis on multiple vehicles at once.

All Systems Diagnostics

The Autel IM608 Pro provides Powerful OE level diagnostics for more than 80 US, Asian and European makes and models. With just one touch on your screen, the Auto Scan tool can run an extensive all system scan over all the ECUs in your vehicle. It has capable functions such as reading and deleting error codes, viewing freeze frame data, and retrieving ECU information. This high-quality diagnostic scanner employs an easy-to-use route to search and resolve internal faults in your vehicle. If you are diagnosing a new vehicle model, you can easily update the unit when the new software is available for free. This upgrade offer is only accessible for one year.

Maintenance services

Autel IM608 Pro can perform more than 20 maintenance services such as EPB, DPF, SAS, Oil reset, BMS, TPMS sensor ID relearn, etc. Autel IM608 Pro includes both smart mode and expert mode to guide technicians when performing an IMMO. The smart mode offers guided automated key learning. This option is easy for beginners as they can follow step-by-step through a series of functions. While the expert mode offers advanced key learning. This option allows experts fast access to desired functions.



  • Easy to use.
  • Free software updates.
  • It comes with a warranty.
  • Good memory capacity.
  • Diagnostic tool is fast because of its sensitive touchscreen.
  • Great scanning sensitivity.


  • It is not compatible with pre-1996 vehicles.
  • Quite expensive.
  • Hard to get a battery replacement.

2.Launch X431 Pad VII plus X-Prog3

The Launch X-431 PAD VII is a Diagnostic Tool with X-PROG3 Immobilizer & Key Programmer which also supports ADAS calibration, 32 service functions, TPMS, and online programming. The X-431 PAD VII integrates Smartlink C, which can support SmartLink remote diagnosis and 8 extended modules such as videoscope, oscilloscope, sensor box, TPMS tools, key immobilizer, and battery tester. It has full-System Vehicle Coverage for U.S., Asian and European Markets, Over 110 Brands, Which is Continually Updated. An intelligent diagnostic tool that identifies VIN automatically and access the system quickly

The most powerful hardware

The Launch Pad VII runs on Android 9.0 OS. The device comes with a 13.3 touchscreen display with a resolution of 1920×1200. The Launch pad vii is powered by a 2.0GHz Octa-core processor. It features 8GB RAM and a storage of 256GB for faster operations. This device also features a rear 13MP and front 8MP camera. It has 2.4GHz & 5GHz dual band communication that ensures a quick and stable connection.

X-PROG 3 Immobilizer & Key Programmer

Launch X-PROG3 is a dynamic Immobilizer and key programmer that is capable of anti-theft type identification, reading/writing keys, Remote control matching, Key chip reading & matching, anti-theft password reading and anti-theft component replacement.

X-PROG 3 enables reading/writing EEPROM, on-board MCU and BMW CAS4+/FEM chips, Mercedes-Benz infrared keys, generating special keys, reading BMW engine INS code. It works for Automatic Transmission, Instrument System, CAS, Body System, Lock System, etc. It is compatible with the X-431 series of diagnostic scanners.

Launch X-431 PAD VII PROS and CONS


  • Free Update Online
  • Global Version Without IP Limitation
  • Wide coverage of car models
  • Powerful diagnostic functions
  • Accurate test data
  • Support multi-language


  • It is expensive

3. XTool X100 Pad3 with KC501 

Xtool X100 Pad3 is an all-in-one Key Programming and Advanced Diagnostic Tool equipped with Kc501 key programmer with 30+ functions, Bi-directional control, wide vehicle coverage, OE all systems diagnostics and IMMO key programming.

The Xtool x100 pad 3 has an 8-inch LED capacitive touch screen with 1024×768 resolution. It functions on an Android Operating System and a powerful Cortex 1.8Ghz 4-core processor. It has an internal reliable 64GB On-board Memory for better performance and 10,000mah battery. The device comes with a built-in 8-mega pixels rear camera with autofocus and flashlight and dual Wi-Fi to access the internet faster.

Key programmer for Mercedes

Xtool Kc501 performs infrared key programming for Mercedes-Benz, key matching for Benz FEM3, read remote frequency, chip type and key ID. With an application, it supports key programming and EEPROM programming via PC.

KC501 supports reading, writing, erasing and other functions of various chips such as registers, microcontrollers, anti-theft, etc., and supports more than 120 EEPROM, 7 MCU, and 11 ECU read and write functions. It also supports automatic key recognition, partial key reading and writing, key generation, key information reading, key check lock, key unlock and other functions.

Full-system diagnosis

This device operates a powerful OE level diagnostics for more than 80 US, Asian and European makes and models. The diagnostic scan can access & clean Code Data, Frozen Frame Data, 5 digital codes, Read and Clear code, O2 Sensor Test Result, Discontinuous Monitoring Systems, Record Vehicle Information, Pending code, Bi-directional Component. With Bi-Directional Control functions, you can request information or command a specific function into the ECU to identify the source of failure in your car effortlessly, and troubleshoot without using the vehicle’s control.

Xtool X100 Pad3 PROS and CONS


  • 2 years of Free Software Updates
  • 2 years Warranty
  • Wide vehicle coverage
  • Support multi-language


  • Not compatible with all cars


4. OBDSTAR X300DP Plus


The Obdstar x300dp plus is a diagnostic tool with Immobilizer, Special function(EEPROM+Key Renewing), all systems diagnostics, and ECU functions.

It is based on Exynos4418  Dual Core ARM Cortex A9 1.4GHz processor. It comes with a 8.0 inch LCD and 1280×800. The device features a 5 mega rear view camera, 3700mA battery, 32G Micro SD (TF) card, 1GB Memory capacity, and 32GB Storage capacity. It is specially designed for the Android platform with a clear and user-friendly interface.

4-System Diagnosis

Full-function diagnosis on the electronic control system of prevailing vehicle models covering Asian, European, American and Chinese models. Diagnosis functions include Read DTCS, Clear DTCS, Read data stream, special functions etc.

Key programming for cars all over the world

Its special function includes ABS, EEPROM Adapter, Battery match, CVT learning, EPB, Gear learning, Immobilizer, TPMS (low tire) reset, Cluster calibrate, ECU programming, steering angle reset.

Obdstar x300dp PROS and CONS


  • Easy to operate
  • All vehicle systems diagnostics
  • Can clone ECU directly with no risks


  • Not compatible with all vehicles

5. Xhorse Key Tool Plus Key Programmer

The Xhorse Key Tool Plus is equipped with an IMMO ECU Programmer Full Version and provides an all-in-one solution for locksmiths with no need for a laptop or a mobile phone. The Xhorse key tool supports IMMO programming for luxury cars such as BMW, BENZ, AUDI, and VW. It is also available to control Xhorse key cutting machines

The Xhorse key tool operates on an 8-core 2GHz processor and Android 9.0. It comes with a 4G+128G RAM+ROM, Screen Size of 10.1″ HD Anti-glare, Anti-fingerprint for top operation experience and Rear HD Camera of 13.0MP. It has a long Battery life of 10000mAh and a 30W Super Fast Charge.

IMMO programming for common car brands

The Xhorse key can perform IMMO programming for luxury car brands such as Benz, BMW, Audi, VW and common car brands – Toyota, Honda, Mazda, Ford, etc. It supports over 20,000 car models worldwide.

It also provides basic functions of a Key Tool, such as identifying transponder, remote renew, transponder clone, generating transponder, IC/ID clone, remote clone, generate remote, frequency detection, and remote cloud recognition.

Control Xhorse Key Cutting Machine

Xhorse key tool is available to control the key cutting machines (CONDOR Mini Plus, DOLPHIN XP-005, XP-005L and PANDA), to perfectly work as an operation screen. By using the Xhorse key tool, you do not need your smartphone.

Support many other prog functions.

The prog function comprises of EEPROM and FLASH, IMMO, Instrument, read ECU with CAN, Data edit, Airbag, and ECU, etc. The Xhorse key Supports BMW IMMO module programming covering CAS3, CAS3+, CAS4, CAS4+, BDC, FRM, and FEM.

It also supports Land Rover RFA module reading and immo programming, Porsche BCM programming. It is able to read ECU with CAN on AUDI, BMW, and Volkswagen. It supports instrument programming on HONDA, KIA, and Hyundai. The device had the capabilities for EEPROM reading and writing. It supports reading & writing most types of transponders in the market. Such as: ATMEL, Mitsubishi, Winbond, Catalyst, ST, XICOR, Microchip, SEIKO, Xhorse, MXIC, Toshiba.

Xhorse PROS and CONS


  • Support multi-language
  • Lifetime free update online
  • 1 year warranty
  • Easy to use


  • Requires internet connection for all key lost functions

Service Functions

Autel IM608 Pro Launch X-431 PAD VII Xtool x100 pad3 Obdstar x300dp plus Xhorse key tool plus


Oil Reset



Sensor ID Relearn

TEC Learn

Airbag reset

Trans Adaption



CHG tire size


Lang change



Win DR roof





Brake bleed

Service Lamp Reset

Electronic Throttle

Brake Reset

Immobilizer Reset

Battery Reset

Injector Coding

SAS Reset

TPMS Reset

ABS Bleeding

Gear Learning

DPF Regeneration

Gearbox Reset

Headlamp Reset

Sunroof Initialization

SUS Reset

EGR Adaption

A/F Reset

AdBlue Reset

Nox Sensor Reset

Stop/Start settings

Transport Mode

Coolant Bleed

Windows Calibrations

Seat Calibrations

Tyre Reset

Language Change

Acc system Calibration

Acc System Initiation

Engine Power Balance Monitor

Gas Particulate Filter Regeneration

Motor Angle Calibration

High-voltage Battery Health Detection


Service or Maintenance Light

Steering Angle Sensor Adjustment

Window Initialization

Throttle Body Reset

DPF Reset

BMS Reset

Seat Match

Electric Parking Brake

Cylinder (X100 PAD2 Pro without)

Airbag Repair (X100 PAD2 Pro without)

Air Suspension

Injector Coding (X100 PAD2 Pro without)

EEPROM Adapter


Tyre Pressure Reset

Oil service reset

Manual remote setting

ABS bleeding

Battery matching

ECU programming

The car with EPB replace brake pads

Throttle programming

Airbag reset

TPMS reset

steering angle reset

OBDII Engine

DPF Regeneration

Injector coding

Suspension match

Gear learning

CVT learning


Key Renew

Steering angle repair

ECU Clone

Switch activation




CAN and K protocol switch pin

Chip pin detection

Toyota Smart key programming without simulator

Long-distance IMMO collection

Built-in OBD matrix switch

Radiofrequency simulator

Smart key simulator

Integrated key identification coil

BENZ infrared reading head



We have listed the best all-in-one key key programming and diagnostic tools above. None of these tools can do everything and is compatible with every car, instead each of them have specific features and functions. They all have their merits and demerits. Some are better suited for a specific purpose than others and vice versa. Although some provide more functions than their counterparts. Choosing the best tool for you will depend on what you intend to use it for and how much you are willing to pay.