Overview

Buy with the official UK distributor and receive a genuine product, a two-year warranty, free updates and free expert advice from an iCarsoft tech for life.

The iCarsoft MB V4.0 comes pre-installed with software for Mercedes, Sprinter & Smart, making it ready to use right out of the box. 2 further vehicle groups can be downloaded when you need it free of charge.

You can choose from any two of the groups below (some groups include multiple manufacturers, for example, Jaguar & Land Rover).

European Manufacturers: Abarth, Alfa Romeo, Audi, BMW, Citroen, Dacia, DS, Fiat, Ford, Jaguar, Lancia, Land Rover, Maybach, Mercedes, Mini, Opel, Peugeot, Porsche, Renault, Rolls Royce, Saab, Seat, Skoda, Smart, Sprinter, Vauxhall, Volkswagen, and Volvo.
Japanese Manufacturers: Acura, GTR, Honda, Infiniti, Isuzu, Lexus, Mazda, Mitsubishi, Nissan, Scion, Subaru, and Toyota.
Korean Manufacturers: Daewoo, Hyundai, Kia, and Renault Samsung.
US Manufacturers: Dodge, Ford, Chrysler, Jeep, Lincoln, Mercury and GM (Chevrolet, Buick, Cadillac).
Australian Manufacturers: Ford, Holden.

What is Bi-Directional Control?
The MB V4.0 doesn’t just read codes—it talks directly to your car. This professional-grade scanner sends active commands straight to individual vehicle modules and watches them respond in real time, bypassing the cabin switches entirely.

Why do you need it?
Imagine a power window won’t roll up. Is it a broken door switch, a blown fuse, or a dead motor? Instead of ripping apart the door panel to test wires, you just tap the screen on your MB V4.0. If the window rolls down, you know the motor is perfectly fine and the switch is the culprit. No more guesswork, no more buying parts you don't need.

What can you do with it?

Cycle the ABS pump motor to purge trapped air during brake bleeding.
Command window regulators up and down to isolate bad switch clusters.
Kick on the fuel pump instantly to verify fuel pressure dropping issues.
Modulate throttle opening to check for sticking carbon deposits.
Trigger door locks and side mirrors to pinpoint body control module glitches.
Run dynamic output tests on virtually any onboard actuator or solenoid in minutes.

Buy with the UK's official iCarsoft distributor and you will receive both this vehicle diagnostic tool as well as lifetime access to our premium customer service package, which includes:

Free technical advice and updates
A warranty lasting up to two full years after purchase

This V4.0 device is capable of performing the following functions, but please note not all functions will be supported on all vehicles. To ensure the device is compatible with your vehicle, please contact us or check the coverage lists under the ‘Compatibility’ tab in this description.

General diagnostics (reading and clearing fault codes)
Oil service interval reset
SAS calibrations
Electronic parking brake
Electronic throttle controls
Battery management system (please note, not available for Mercedes)
ABS bleeding
DPF regeneration
Injector coding
Air conditioning systems
Sensor calibrations
Door, window and roof
Engine control unit, including adaptations
Idling (vehicle start / stop systems)
Headlight adjustments
Seat settings
Air suspension
Transmission control module
Tyre pressure monitoring system
Odometer reset (does not alter mileage; for lawful verification only)
Turbocharger learning & relearning
Exhaust gas recirculation
AdBlue reset
Crankshaft learning
Clutch matching (for adaptive clutches only)
Head-up display calibration
High voltage battery adaptation & monitoring
Vehicle language settings
Rain sensor
Radar & camera learning & calibration (ADAS)
Cylinder shut-off test
Speed limit assist
O2S (oxygen sensor)
Seatbelt pretensioner reset
Mileage verification
VIN verification

PLEASE CLICK HERE TO USE OUR NEW COMPATIBILITY CHECKER

Features

The iCarsoft MB V4.0 comes packaged with a wide range of useful features for technicians, including:

General Diagnostics: Read and erase fault codes, and detect and translate the most common codes and warnings on the vehicle display. This includes the airbags, transmission, and engine, among others. Access to a full DTC library, as well as the ability to clear and read data in real time.
Multi-Language Support: English, French, German, Spanish, and Dutch
Compatible with a wide range of OBDII/EOBD testing modes (J1850 PWM, CAN, J1850 VPW, KWP2000, ISO9141)
I/M Readiness indicates whether or not the various emissions-related systems on the vehicle are operating properly and are ready for Inspection and Maintenance testing.
Freeze Frame - When an emission-related fault occurs, certain vehicle conditions are recorded by the onboard computer. This information is referred to as freeze frame data. Freeze Data is a snapshot of the operating conditions at the time of an emission-related fault.
O2 Sensor Test -- This option allows retrieval and viewing of O2 sensor test results for most recently performed tests from the vehicle's onboard computer.
On-Board Monitoring -- This function can be utilised to read the results of on-board diagnostic monitoring tests for specific components/systems.
Retrieve generic (P0, P2, P3, and U0), manufacturer specific (P1, P3, and U1) codes and pending codes
Improved live data reading, complete with colourization, live updates, and speedy refreshes
Printing: After retrieving important data via customised testing or scanning, you can then print it out for your records.
Accessible Interface: Highly readable screen and large silicone keys

PLEASE CLICK HERE TO USE OUR NEW COMPATIBILITY CHECKER

Compatibility

This V4.0 scanner is capable of performing the following functions, but please note not all functions will be supported on all vehicles. Please check compatibility of your vehicle using the link below. If your car is not there, it will not be supported.

PLEASE CLICK HERE TO USE OUR NEW COMPATIBILITY CHECKER

General Diagnostics
Reading and clearing fault codes (DTCs), and viewing live data.
Oil Service Reset Interval
Reset the warning light that says an oil change or service is due. The scanner will do this on one-click in some cars, but for others a step-by-step process is required which the scanner will guide you through.
SAS Calibrations
This function allows you to reset or calibrate new Steering Angle Sensors after they have been changed.
EPB
The Electronic Parking Brake function allows you to manually wind back the rear brake pads into the service position, allowing you to change and recalibrate them.
ETCs
The Electronic Throttle Control function allows you to perform an adaptation after cleaning or replacing the Electronic Throttle Body. This function is also used when the ECU is replaced, or a negative battery terminal has been disconnected.
BMS
Access the Battery Management System of the vehicle in order to register a new battery and reset parameters after the battery has been changed. Please note this is not available for Mercedes.
ABS Bleeding
This function will allow you to bleed the brakes and remove air in the ABS module (Anti-lock braking system).
DPF Regen
Force a Diesel Particulate Filter Regeneration on the vehicle when the car cannot burn off the excess soot on its own. View live data including the DPF Fill Soot Levels. A full list of the parameters that must be met before performing this function can be viewed here.
Injector Coding
Code new injectors to the vehicle after replacement in order to ensure the car is burning off the correct amount of fuel, and carry out an Injector Valve Test. Please note: even if this function is supported, compatibility is only guaranteed if the injectors are replaced with the same type.
Air Conditioning Systems
This function allows you to carry out tests on the AC system, and reset the compressor. It includes adaptations and resets of the system.
Sensor Calibrations
Reset various different sensors within the vehicle. Please refer to the bottom of the compatibility list to view the exact options available.
Door, Windows, and Roof
Use this function to calibrate and initialise the door and the roof windows.
ECU - Engine Control Unit
The ECU function helps to reset and replace various parts of the vehicle within the Engine Control Unit, and also includes some adaptations. Please refer to the bottom of the compatibility list to view the exact options available.
Idling
This function deals with the vehicle’s start/stop systems. Use it to run an Idle Speed Test and make adjustments.
Headlight Adjustments
Calibrate the headlights and the axle sensor.
Seat Settings
Reset and calibrate the seats in the car. Includes heated seat settings (climate controlled), massage, seat entry and exit, and replacements.
SPS - Air Suspension
This function allows you to calibrate and reset parameters, inflate, deflate and enable the Air Suspension system. Access the Ride Level Control, perform height calibrations, and set tolerances.
TCM - Transmission Control Module
This function allows you to recalibrate and replace sensors within the TCM, also known as the Gearbox Control Unit. Please refer to the bottom of the compatibility list to view the exact options available.
TPMS - Tyre Pressure Management System
Use this function to calibrate and reset the tyre pressure monitoring system, and replace tyre pressure sensors.
ODO Meter Reset
Reads and verifies odometer values stored across multiple ECUs. (Note: this function does not alter mileage; it is intended for lawful service and verification only.)
Turbocharger
Performs turbocharger learning after component replacement, or resets stored learned values.
Exhaust Gas Recirculation
Recirculates a portion of engine exhaust gas back into the intake system.
Door Service
Performs full calibration after window lift motor repair or replacement.
AdBlue
Resets the AdBlue (urea) level counter after the diesel exhaust fluid is refilled or replaced.
Crankshaft Learning
Performs crankshaft position learning and related calibration after engine repair.
Clutch Matching
Learns the clutch contact point and engagement position where the clutch begins to transmit engine torque. Applicable after ECU replacement, transmission removal/replacement, or clutch replacement. For adaptive clutches only.
Head-Up Display
Used for learning and calibration of heads-up display.
High Voltage Battery
Supports EV/hybrid high-voltage battery maintenance, including replacement adaptation and status monitoring.
Vehicle Language Setting
Changes the vehicle's system language.
Rain Sensor
Calibrates the rain sensor after windshield replacement or sensor renewal.
Radar/Camera
Performs radar and camera learning and calibration (ADAS).
Cylinder Shutoff Test
Tests each engine cylinder individually by disabling its fuel supply - useful for diagnosing cylinder-specific issues such as misfires or low compression.
Speed Limit Assist
Sets or removes the vehicle's maximum speed limit.
O2S (Oxygen Sensor)
Supports oxygen sensor replacement adaptation and initializes the three-way catalytic converter learned values.
Seat Belt
Performs seatbelt pretensioner reset and related maintenance after airbag deployment.
Mileage Verification
Checks and compares odometer data stored across multiple ECUs to detect mileage tampering.
VIN Verification
Reads and matches the VIN across all vehicle ECUs to detect inconsistencies or unauthorized module replacement.

The following are OE-Level Advanced Diagnostic Functions

Dealer-Level Yaw Rate Sensor Calibration
Calibrates the yaw rate sensor to OE standards after replacement or alignment — equivalent to the dealer SDD procedure.
Powertrain Configuration & Adaptation Reset
Wipes learned shift patterns to reset ECM/TCM adaptive, instantly curing harsh shifts and restoring factory-smooth drivability.
HVAC / Throttle Stepper Motor Initialization
Forces the PCM to relearn precise physical endpoints for throttles and blend doors, fixing erratic idles and ghost climate-control issues.
One-Touch Bulk Stepper Motor Re-Programming
Re-indexes all cabin blend-door actuators and temperature flaps simultaneously with a single tap, slashing hours off tedious dashboard overhauls.
Smart A/C Compressor Lockout Reset
Overrides and clears protective climate-control codes triggered by low voltage or low freon, unlocking the A/C clutch without a trip to the dealer.

We would be happy to check compatibility for you if you are unsure. Please contact us with the full vehicle details including the model, manufacture year and chassis type, or provide the VIN

Specs

The iCarsoft MB V4.0 has been optimized for use and accessibility. Its current specs include:

Operating System: Android
Processor: Quad Core 1.3 GHz
Storage: 32GB
Display: 5-inch LCD capacitive touchscreen with 854x480 resolution
Connectivity: USB 2.0 / Wi-Fi (2.4GHz) / OBDII
Power: 9-18V
Operating Current: ≤500mA
Battery Capacity: 3.7V 5000mAh 18.5Wh
Tested Battery Life: Around 6 hours of continuous use
Type C Input: 5V / 2A
Power Consumption: 500mA (LCD on with default brightness, Wi-Fi on) @3.7 V
Operating Temp.: 0 to 50°C (32 to 122°F)
Storage Temp.: -20 to 70°C (-4 to 158°F)
Operating Humidity: 5% - 95% non-condensing
Dimensions (W x H x D): 200 × 116 × 30.2 mm (7.87 × 4.57 × 1.19 in)
Net Weight: ≈ 380 g
Supported Automotive Protocols: ISO 9141-2, ISO 14230-2, ISO 15765, K/L-Line, Flashing Code, SAE-J1850 VPW, SAE-J1850 PWM, ISO 11898 (High-speed, Medium-speed, Low-speed, and Single-wire CAN), CAN-FD, SAE J2610, GM UART, UART Echo Byte Protocol, Honda Diag-H Protocol, TP2.0, TP1.6

In addition to the actual unit, the iCarsoft MB V4.0 also ships with a user manual, a nylon carrying case, two cables (a USB-C cable and one main cable), and a TF card already installed within the unit.

FAQs

Updating the Scanner

This scanner can be updated via Wifi, or you can use the official iCarsoft updating tool here.

Updates are free for life, so the price you pay when purchasing the scanner is the only cost you will ever need to pay.

Before updating, please remove all current software from the scanner to ensure there is enough space for the download. Plug the scanner into the computer and locate its file, then delete all contents the same way you would delete files on a USB stick.

My Vehicle Isn’t Supported?

All of our compatibility lists are fully up to date, so if your vehicle isn’t supported it is likely for one of the following reasons:

Older models - some older vehicles will not support these scanners as the software does not exist for vehicles of this age.
Newer models - it takes iCarsoft around 2-3 years to develop software after vehicle releases. For example, the software for 2024 vehicles is likely to be released in 2026/2027.
Electric vehicles - iCarsoft scanners do not currently support electric vehicles.
The manufacturer has blocked the function - some software is not able to be created as the car manufacturer has implemented a factory access code which the scanner cannot bypass.

Automatic VIN Recognition

Whilst iCarsoft scanners are able to automatically recognise the majority of VINs, some VINs are atypical and will not follow the standard format. Therefore, we cannot guarantee that automatic VIN recognition will work on every single car. If it isn’t recognised automatically, the VIN can be entered manually.

How Do I Print Data?

Please click here to Download the User Guide to print data.

OBD2 Connection

OBD2 is the standard connection type that allows the scanner to communicate with the vehicle.

Vehicles imported from Japan will have a different connection type which none of our scanners support. Please ensure the car is not an import and has a standard 17-digit VIN before purchase.

Returns, Support & Warranty

Returns

Due to an increased number of customers not checking compatibility before purchase, we can now only offer to cover the cost of return postage in exceptional circumstances - such as if the error regarding compatibility is our own, or the scanner itself is faulty (please see ‘Warranty’ below).

Please note that whilst our scanners are capable of performing many functions, this doesn’t mean that every single function is definitely supported on your vehicle. Please check the provided compatibility lists or contact us directly to confirm compatibility.

Upon contacting us about a return, please provide your vehicle details and the function you are trying to access, and we will check compatibility for you.

If you order a scanner that is not supported with your vehicle you are of course welcome to return for a refund within 30 days of receipt, however we kindly ask that you pay to return this yourself. We can recommend the Royal Mail Tracked 48 service as the best value option for UK customers.

If your vehicle should be supported but the scanner is not working as it should, we can also offer technical support (see below).

Technical Support

Most problems can be fixed by updating the scanner, so please try this first. Please ensure all fault codes have been cleared in order to perform the service functions.

We have a dedicated iCarsoft technician that we can contact on your behalf if you do experience an issue that we cannot resolve ourselves. Please contact us with any problems and we will do our best to get your scanner up and running as soon as possible.

In the unlikely event that we cannot get the scanner working for you, we will cover the cost of postage for your return, and refund the order in full.

Warranty

Every iCarsoft scanner comes with a 2 year warranty as standard. This includes electronic faults and problems with the use of the unit, but does not cover accidental damage, e.g. a cracked screen.

Your warranty covers you for replacement of the same scanner model only. After the initial 30 days returns period has passed, the warranty entitles you to the replacement only, and not a refund. A refund will only be offered within the initial 30 day returns period, or if the scanner is unable to be replaced for any reason (e.g. out of stock).

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