Best OBD2 Scanners That Can Read ABS & Airbag Codes (Budget Picks)
Last Updated on March 14, 2026 by Juraj
Many cheap OBD2 scanners can only read basic engine fault codes.
But when the ABS light or airbag warning appears, a basic code reader is usually useless.
To diagnose problems in systems like:
- ABS (anti-lock braking system)
- SRS / Airbag
- Transmission
you need a scanner that can access multiple control modules.
In this guide I tested several budget scan tools that can read at least the four most important systems in a vehicle:
- Engine (ECU)
- Transmission (TCM)
- ABS
- Airbag (SRS)
These scanners are often called 4-system scanners and they are a great upgrade from basic engine code readers.
Affiliate Disclosure: iamcarhacker.com is an Amazon and other affiliate programs Associate. As an Amazon Associate, I earn from qualifying purchases. Full Affiliate disclosure.
Quick recommendations
Reliable 4-system scanner with fast diagnostics, Wi-Fi updates, and useful service functions. A great option if you want something simple but still powerful.
Mucar 682 – Best for all-system access
A surprisingly capable scan tool with bi-directional testing, full system access, and free lifetime updates.
Budget scanner that can still perform actuator tests and read data from the four most important systems.
Best OBD2 scanners for ABS/SRS compared
XTool D5S
XTool D5S is a reliable 4-system scanner with very good vehicle coverage. It offers fast diagnostics, Wi-Fi updates, and several service functions like oil reset or DPF regeneration.
(10% OFF with “CARHACKER” on official website)
(Try coupon “IAMCARHACKER” for 15% OFF – may still work)
Mucar 682
Unlike most scanners in this category, Mucar 682 can scan all vehicle modules, not just the four main systems. It’s slightly more expensive but offers much deeper diagnostics, bi-directional testing, and free lifetime updates.
(10% OFF with “CARHACKER” on official website)
Thinkscan 662
Thinkscan 662 is one of the cheapest scanners that still supports bi-directional testing. It can read and control the four main systems (engine, ABS, transmission, airbag) and works well as a budget diagnostic tool.
(10% OFF with “CARHACKER” on official website)
Launch CRP 129X PLUS
Launch CRP129X is a well-known mid-range scanner with solid compatibility across many vehicles. It supports multiple systems, live data graphs, and several common service procedures.
Foxwell NT604
Foxwell NT604 is a simple but proven scanner focused on the four essential systems. It’s a good choice if you mainly want to diagnose ABS or airbag warning lights.
What is a 4-system OBD2 scanner?
A 4-system scanner can access four important vehicle control modules:
| System | What it diagnoses |
|---|---|
| Engine | Engine fault codes and sensor data |
| Transmission | Gearbox problems |
| ABS | Brake system and ABS warning lights |
| Airbag (SRS) | Airbag crash codes and safety faults |
Compared to a basic code reader, this allows you to diagnose many more problems in the vehicle.
When a 4-system scanner is enough
A scanner with ABS and SRS support is usually enough if you:
• want to diagnose ABS warning lights
• want to read airbag fault codes
• work mainly on older vehicles
• need something better than a basic code reader
For many DIY mechanics this type of scanner provides the best balance between price and functionality.
When you should buy a full-system scanner instead
Modern vehicles often have 30–50 control modules.
If you want to:
• diagnose modern vehicles
• check used cars before buying
• run actuator tests
• access every control module
you should consider buying a full-system bi-directional scanner instead, for example already mentioned Mucar 682.
Conclusion
4-system scanners are a great upgrade from basic engine code readers. They allow you to diagnose some of the most common problems in a vehicle, including ABS faults and airbag warning lights.
While they cannot access every control module like professional scanners, they are still a very useful and affordable option for DIY mechanics working on older vehicles.
Popular OBD2 guides
See all guides
Best OBD2 scanners in 2025
I constantly test new OBD-II scanners to give you the best options possible. Here is a full list of the best tools in all categories currently.
Responses