I tested some multi-system scanners (can scan engine, transmission, ABS, and airbag) to see which ones are the best. There are also some questions you should answer before getting one since you might be better off buying different types of scanners in similar price ranges in some cases.
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Quick recommendations

xTool D5S

Launch CR629

Ancel AD610 PRO

Foxwell NT604

Launch CRP 123X
Testing & comparing

Tester & Author: Juraj Lukacko
I care about giving you guys the best value-for-money tools as I am a DIY mechanic myself and I am sure I don’t want to spend money on crappy tools 🙂
I test new diagnostic tools every week, so I don’t just offer a few random products.
I have personally tested more than 100 car diagnostic tools, so I understand which ones are worth purchasing.
You can read the full review policy HERE, but now check what I found:
I tested a few of these scanners to realize this
So I tested some of these 4 system scanners, for example, Ancel FX2000. This worked fine but it’s pretty basic.

I tried Launch CRP 123, the cheaper version of 123X, which I actually recommend. I don’t really like the previous version.
Updating this one was some hard work, I learned the better 4-system scanner is one that can be updated via Wi-Fi, instead of having to take out a memory card, install a complicated update client, and hope it will work.
(Chance is like 50/50 :D)

OK, I will talk about which 4-system scanner I like the most soon but first let me ask you these questions.
Do you even need a 4-system scanner?
You have to understand that while a multi-system scanner is a step up from a basic code reader, in this age it can be fairly useless for newer cars.
Just imagine working on your new 2024 Honda just to find out you can only work with 4 control modules out of 30 control modules.
OK, these 4 are probably the most important control modules in a car.
But if you plan on fixing & diagnosing everything or want to check used cars (have to check all modules of course), you probably should rather buy one of the cheaper bi-directional scanners that allow access to all control modules.
4-system is good for older vehicles

If you work on older cars maybe up to 2007, you can work with the 4-system scanner as these cars usually does not have a lot more modules than these 4.
My personal favourite is xTool D5S

It does its job perfectly!
xTool D5S can be updated via Wi-Fi so no more that memory card vs update client shenanigans. It worked without issues on all vehicles I tried it on and can access all of 4 mentioned modules and scan them for data and faults.
Conclusion: Test winners

xTool D5S

Launch CR629
Video: xTool D5s Review
This is my personal favorite in this space, xTool D5S.

OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes

Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)