Launch X431 Diagun V Full System Scan Tool Review

Launch X431 Diagun V is new update version of X431 Diagun IV which is a cost-effective Bi-Directional full system scan tool.  LAUNCH X431 Diagun V, Featuring a quad-core 1. 1 GHz processor , a 5. 5 inch Touch Screen, This diagnostic tool will give your car a full detection . X431 Diagun V  inherits many advantages of X-431 Diagun IV, such as wide coverage of car models, support Asian, European, American and China, up to 94 car brands, up to 10000 car models. Full range car models and full car system diagnose make it a professional automotive diagnostic tool. Also support multi-Language including English, German, Japanese, Russian, French, Spanish, Russian, Arabic and Korean.

Launch X431 Diagun V Functions:

1. Full System Diagnostic Function – Precise Diagnosis

To diagnose car comprehensively, LAUNCH X431 Diagun V can read DTCs and data streams for ALL systems. For instance: Engines/Auto Transmission/Airbags/Immobilizer/Key Coding/ABS/Cruise Control/Instruments/ Self Leveling Suspension systems/Seats/Doors/Gateway/Steering Angle/Air Suspension/Body Systems/Electronic Power Steering & Motor Assisted/Power Steering/Tyre Pressure/Rain Sensors/4WD System/Stabilizer/Intelligent Parking Assist/Door Motors/Audio Systems/Air Conditioning/Tiptronic/Anti Theft/Soft Top/Headlamp Leveling/Central Locking/Automatic Clutch/ DPF Reset/Electric Windows/Plip Programming/Heated Rear Window/Xenon Headlights/Wash Wipe/Fuel Burning Heater/Transfer Box/Seat Memory/Oil Life Service Reset/Sliding Doors/Electronic Throttle/Navigation System/Rollover Sensor/Cruise Control/ Multi Function Steering Wheel/Aux Heating/Electronic Parking Brake/Clutch Electronics, ….etc.( OVER 100,000 CAR REPAIR SHOPS & MECHANICS ‘s First Choice)

2. Diagnostic Function – Data Stream and Waveform Recoding and Playback 

Data stream and waveform recoding and playback can analyze the faults that only reoccur during driving and can quickly rectify car faults.

3. One-click Feedback of Diagnostic Problems

If the car model or a function is abnormal during use, you can provide the fault information to Launch through diagnostic feedback, and then a specialized technician will track and deal with the fault.

4. Massive Maintenance Help Materials

Provide a large number of detailed operation skills, maintenance materials, maintenance cases, training videos, and product manuals to help maintenance technicians quickly rectify faults and improve the diagnostic efficiency.

5. Personal Center

Personal Center includes My Report, My Connector, Firmware Fix, Diagnostic Feedback, Personal Information, Change Password, Settings and so on.

6. Many Special Functions

Engine/ABS/SRS/Transmission reset ; Oil Lamp Reset ; TPMS Reset ;Key Programming ;Electronic Parking Brake Reset ;Steering Angle Calibration ;Battery Register / Battery Maintenance ;ABS Bleeding ;Electronic Throttle Position Reset / Learn ;Diesel Particulate Filter (DPF) Regeneration ;Gear Learning ;Injector Coding: ;AFS Reset ;EGR Adaptation ;GEARBOX Reset ; SUNROOF, SUS Reset,

1.Oil Lamp Reset allows you to perform reset for a new calculation of Engine Oil life system once changed the oil.

2.TPMS Reset: makes TPMS sensor in displaying sensor IDs from the vehicle’s ECU,inputting TPMS sensor replacement IDs and testing sensors.

3.Key Programming: read pin code from vehicle security immo system,mainly used to disable the lost vehicle keys and program a new replacement key fob.

4.Electronic Parking Brake Reset: to deactivating and activate the brake control systems, assist with brake fluid control, open and close brake pads, and set brakes after disc or pad replacement .

5.Steering Angle Calibration: to perform calibration for the Steering Angle Sensor, and clear fault memory

6.Battery Register / Battery Maintenance: allows the scan tool to evaluate the battery charge state, monitor the close-circuit current,register the battery replacement, and activate the rest state of the vehicle battery system

7.ABS Bleeding: the auto bleed procedure is used on brake pump equipped vehicles

8.Electronic Throttle Position Reset / Learn : Initialize the throttle actuators so that the “learned” values stored on ECU are returned to the default state;

9.Diesel Particulate Filter (DPF) Regeneration: specially works for Diesel Particulate Filter system with DPF regeneration,DPF component replacement teach-in and DPF teach-in after replacing the engine control unit.

10.Gear Learning : Perform gear learning for the car when the engine ECU, the crankshaft position sensor, or the crankshaft flywheel is replaced;

11.Injector Coding: Code new injector numbers to replace the previous one when fitting the new injectors or after the replacement is completed;

X431 Diagun V VS X431 Diagun IV :

Product X-431 Diagun IV X-431 Diagun V
System Android 7.0 Android 7.0
Screen Size 5.5-inch HD  720*1280 5.5-inch HD  720*1280
Resolution 720*1280 720*1280
Processor Quad-core  1.1GHz Quad-core 1.3GHZ
Memory 1G 2G
Storage 16GB 32GB
2500mAh 4680mAH
Camera Front 2 million, rear 8 million Rear 5 million

X431 Diagun V User Reviews:


X431 Diagun V is one of the best Bi-Directional Scanners on the market. Launch X431 is a great company. They stand behind their product and provide A+ Tech support. I highly recommend their products.


A professional scan tool at this price wow. What a value for the money. Does just about anything you need. I am a retired mechanic of 36 years you cant go wrong.


Launch Diagun V is an excellent tool for both professionals and DIYer’s alike. Works well on most 96 and newer vehicles, but will also work on several pre OBD II vehicles.


Just got X431 Diagun V set up was quick. Able to read codes on 1998 honda. Fixed my vsa and trailer assist on my 2013 Acura mdx.easy to use I scanned 2008 s550 Mercedes Airmatic and worked great to re program suspension.Will have togive more of a review after using on more vehicle’s.


I want to hate this thing(Diagun V), I dislike this form factor. However this has been a useful tool. I have worked on a 2000 VW Beetle, 2001 Audi A6, 2005 Chevy Avalanche, 2012 Chevy Malibu and a 2013 Buick Regal. Doing some hard work like programing a key fob, diagnosing ABS brakes, and figuring out door locks. This unit has worked out with no problems. It won’t program the immobilizer on the VW or Audi but this is due to the lack of information on the vehicles, so the jury is still out on that. It would be nice to have some information about the reports you can make and possibly send to customers. I am guessing most of the information is online with launch, I just feel that the unit could have been sent with something. This product will have to grow on me just a little before I love it. I was able to work on two cars most of the day on a single charge, and would say I could have done a third. The new generation of mechanic will appreciate the form factor.