KONNWEI KW850 vs. KW310 vs. KW350 [Full review and comparison]

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With many products available for the consumers, it is your right to know details before you make your choice. This article exactly does that by giving a comparison between the KONNWEI scan tools: KONNWEI KW850 vs. KW310 vs. KW350. 

We will revolve around the product, its features, what they support, or don’t support. This will help you have all the details to make an informed decision in a nutshell.

KONNWEI KW850 vs. KW310 vs. KW350: Comparison chart

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Customer Rating
Item Weight1 pounds7.2 ounces16 ounces
Product Dimensions9.46 x 3.94 x 2 inches6 x 3.39 x 2.05 inches7 x 5.9 x 2.1 inches
Full OBD2 Functions✔️✔️✔️
Read/Clear Codes✔️✔️✔️
Smog Check✔️
Live Data✔️(4 Live Sensor Readings)✔️✔️(Single Live Sensor Reading)
O2 Sensor ✔️✔️✔️
DTC Lookup✔️✔️✔️
ABS/SRS✔️(V/A Series Vehicles)
TPMS✔️(V/A Series Vehicles)
Software Update✔️✔️

KONNWEI KW850 vs. KW310 vs. KW350: Detailed comparison

Key things in common

These OBD2 scan tools share some common features. Functionally, they all support live data, read and erase codes, freeze frames, handle O2 sensor data, EVAP tests, and provide vehicle information.

In addition, these three KONNWEI scanners are OBDII-compliant. Concerning hybrid or electric cars, all the three are not compatible.

KONNWEI KW850 quickly find out the engine faults and turn off CEL

Key differences

The inner engineering – Design aspects

The KW850 stands a notch above in terms of design aspects. Apart from the standard features expected from the car code scanners, KONNWEI KW850 hosts an RGB color screen with 4 live graphical readings. The Model 6 onboard monitoring function indicates which cylinder has failed and has the inbuilt intelligence which handles the software updates on its own to give some samples. It also allows switching off the malfunction indicator lamp and is embedded with 8000 codes.

KONNWEI KW350 ranks high on another aspect because its design ensures that any faults in the safety restraint system, Anti brake system, the tire pressure monitoring system, or the steering angle sensor catch your eye, but that is for V/A vehicles alone. It also supports automatic software updates.

Regarding KW310, this OBD2 diagnostic tool proves to be a good choice for home use and could save you multiple trips to the mechanic.

Overall features and functions

When considering the KONNWEI diagnostic scanner models we are reviewing here, KW850 and KW350 are both noteworthy. They support the complete range of OBDII scan tool functionality – KW850 for the engine system and KW350 for V/A series, full system.

Furthermore, these two OBDII scanners help judge the root cause of the issue when the air temperature shoots up, or the engine shuts down, or a pungent smell emanates from the vehicle. Not only that, they also take care of resetting the oil, throttle, or brake pad position and also provide information on priority codes by assigning them a current or pending status. Pending codes are not severe and do not turn on MIL.

One aspect of the KW350 OBD2 scan tool is that it does only battery matching and does not live to monitor battery.

If we juxtapose KW310 alongside the other two KONNWEI OBDII scanners, it is a comfortable, handy piece that does not lag in any aspect. Its sports features include reading, storing, playing back live sensor data, battery monitoring, patented One-click emission check to clearing code, and resets monitors. All this and more within the affordable price bracket range.

Such devices have you in much better control of the vehicle than ever before. You should get the information that helps you make informed decisions about your vehicle and needs.

Extra features/functions

Among the three OBD2 diagnostic tools, the one whose features go the extra mile is KW850 code reader as it has an in-house library of 8000 codes. The information can be read in 7 different languages and keeps your vehicle always ready for the SMOG check.

The KONNWEI KW350 OBD2 scanner is a boon for V/A vehicles as it offers the complete OBD2 diagnostic functionality. They cater to the 12V 16 pins SKODA, VW, Seat, and Audi models.

The other OBDII scanner device, KW310, is more than just a basic version and has a choice of 7 different languages. A point in its favor is that most users find it very easy to handle this KONNWEI scan tool. Even without reading the user manual, their menu is self-explanatory.

Supported protocols

KONNWEI KW850 is compliant with all OBD2 protocols. The one listed as CAN ISO 11898, ISO9141, KWP2000 (which is ISO 14230), J1859-41.6 and J1850-10.4

The KW310 supports KWP2000, J1850 VPW and PWM and CAN.

KW350 works with KWP2000, J1850 PWM/VPW, CAN and ISO9141). It also supports all V/A diagnostic protocols.

Supported vehicle makes

All three models support all vehicles that are OBD2 compatible, which means all vehicles from 1996.  Here is the split up.

The KW850 OBD2 scanner is suited for all 1996 US-based, 2003 EU-Based, and Asian (OBDII & CAN) vehicles, both domestic and imported. This includes passenger cars, SUVs, light trucks. 

Whereas, KW310 is compatible with most cars from 1996 and on the newer domestic vehicles. This KONNWEI OBD2 scan tool also works on imported gasoline or diesel vehicles (OBDII & CAN) in the USA, including passenger cars, SUVs, and light trucks.

Lastly, KONNWEI KW350 is manufactured as a full system OBDII diagnostic tool for 12V 16 pin DB Volkswagen (since 2003)/Audi (since 2004)/Skoda (since 2006)/SEAT (since 2010) V/A Series vehicles. It also works with other non-electric cars and light trucks (1996 or later), with a 16 pin OBDII interface for the engine system alone.

Software and updates

Both the KONNWEI code reader, KW850 and KW350, are provisioned for automatic software updates. You can find and download the apps on the official website on the Windows platform. Please note that for KW850, the update is compatible with the official versions of WINDOWS – XP and WINDOWS 10.

The procedure is hassle-free. Using the USB port, connect the device to the PC and press and hold any button on the OBDII scanner. Click the ‘Check Update’ button, and the software gets updated.

The KW310 does not support the software update.

Pros and cons of KW850 vs. KW310 vs. KW350

Each device has its reasons why some consumer segments prefer it and, at the same time, also has its flip sides. Below are listed Pros and Cons.

KONNWEI KW850 OBD2 scan tool

KONNWEI KW850 OBD2 scan tool


  • A design that causes no strain on the fingers.
  • Provides live performance data. So, protections as you drive.
  • The ease of use ensures that non-mechanical people have no problems using it.
  • Have 8000 codes inbuilt.
  • Offers functionality in multiple languages


  • Not suitable for heavy-duty vehicles.
  • No iOS support.
  • Does not monitor ABS and SRS.

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KONNWEI KW310 OBD2 scanner

KONNWEI KW310 OBD2 scanner


  • Special design for home diagnostics
  • Has a diagnostic trouble code library that houses 3000 generic codes.
  • Supports all US, European, and Asia models from 1996.
  • Straightforward to navigate and inbuilt code definition.


  • There is no automatic software update.
  • Can’t test SRS and ABS.

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KONNWEI KW350 OBD2 diagnostic scanner

KONNWEI KW350 OBD2 diagnostic scanner


  • Special release for V/A series
  • Feature-rich device including ABS, SRS check, Oil reset, and TPS reset.
  • The extra-long cable comes in very handy.
  • Graphs a parameter on the backlit screen.
  • Save and transfer to the computer for later usage.


  • No DTC lookup library.
  • Brake pad change is not possible.

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KONNWEI KW850 with its advanced features and many language choices makes it a good buy even for professional use. Ease of use and the presence of many codes have only served to increase the target consumer segment. Newbies to the field would also be comfortable because they even give the parts’ proposed price to be replaced.

If you are looking for a model for home use that is intuitive to use and gives the required data, you can go for the KW310 OBDII code reader. Compatible with many models and gives your insight into your vehicle’s health to make an informed decision.  

In the case of a V/A series vehicle, the choice would lean towards the KW350. With features almost on par with KW850 and does not require an app. Here too, the usage proves to be a painless procedure and can be easily used by beginners.


Can KONNWEI KW850 handle remote programming?

💡 No, KW850 is an OBD2 scanner for the engine system and cannot handle the programming control unit.

Will KONNWEI KW310 work with ABS?

💡 This OBDII scanner does not work for ABS

Can these KONNWEI scan tools be used for detecting rolled back kilometers when buying a used car?

💡 No, these KONNWEI code readers only detect engine faults while rolled back kilometers involve many more parameters.

Does KW850 display code definitions?

💡 KW850 comes with code definitions of 8000 codes. So, you can read the root cause of the code right at this KONNWEI scanner.

Can KONNWEI KW350 erase the service due messages?

💡 Yes, KW350 can reset the service due to messages.

Will the live data function of KW310 also display the engine coolant temperature?

💡 Yes, the live data function of the KONNWEI KW310 will display the ECT.

Will Wi-Fi or Bluetooth connections be required for KONNWEI KW310 to work?

💡 No, Bluetooth or Wi-Fi are not required. You can plug in this ODB2 scanner into the vehicle, and you are good to go.

Final thoughts

Getting to know your vehicle’s problems before something seriously gets faulty has you always in control, and with the KONNWEI diagnostic tools, you don’t need to be an automobile expert for that. These OBD2 code readers give you comprehensive information on the internal status, make corrections, and decide when you need professional help.

Among the three reviewed – KONNWEI KW850 vs. KW310 vs. KW350, the first and last come with certain advanced features, while the second one is for home use.

With no shortage of information on the internet, analyze all your options, needs, car makes, and pick the best KONNWEI diagnostic scanner for you.

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