Choosing the Right Tool for You — IM608PRO II vs IM508S PRO vs IM508S

When shopping for a professional-grade key programming and diagnostic tool, it’s important to choose the one that truly fits your needs, skill level, and budget. Autel offers a versatile lineup of IMMO tools, each designed for a different type of user — from entry-level locksmiths to seasoned automotive professionals.

In this article, we’ll compare four of the most popular models in the Autel IMMO lineup: IM608 PRO II (also known as IM608S II), IM508S PRO, IM508S, and KM100 — to help you make an informed decision.

🧠 Quick Guide To Find Your Best Tool

KM100: Ideal for new locksmiths, mobile work, or budget-conscious users.
IM508S: Great for small workshops or technicians needing basic IMMO & diagnostics.
IM508S PRO: A solid middle ground with more key programming power—without the cost of the IM608 series.
IM608S II / IM608 PRO II: Best for professionals who need full-featured IMMO and advanced OE-level diagnostics. The most powerful models available.

Still not sure?

KM100:

Best Entry-Level Option for Beginners and Mobile Use

If you’re new to key programming or simply need a fast, portable solution, the Autel KM100 is the best tool to start with. It’s compact, lightweight, and extremely easy to use — perfect for locksmiths who need to work on the go. Despite being just a fraction of the price of full-sized tablets, the KM100 delivers impressive functionality and high value. No wonder it's consistently a bestseller among beginner technicians and mobile professionals.

✔ Key Generation in 60 Seconds	✔ Free Lifetime Online Update
✔ Key Learning via OBD for 90% Vehicles	✔ Program Keys for 700+ Vehicles

IM508S:

Affordable Tablet with Basic IMMO + Diagnostics

Need a balance between affordability and functionality? The Autel IM508S is a tablet-based tool that offers essential diagnostic functions along with basic IMMO and key programming features. It’s ideal for smaller workshops or technicians who don’t need full advanced IMMO functions

✔ Advanced IMMO Level	✔ All Systems Diagnostic
✔ Smart & Expert Modes	✔ 3000+ Bi-Directional Active Tests

IM508S PRO:

A Powerful Enhancement in IMMO Capabilities

Pairing with the XP400 PRO, the IM508S unlocks broader vehicle coverage and delivers the same top-level IMMO functions as the IM608S II / IM608PRO II.

✔ Top-Tier IMMO Level	✔ 2 Years Updates — $350 Saved
✔ Get the XP400 PRO Kit — $569 Saved	✔ Upgraded From 28+ to 40+ Services

IM608S II / IM608 PRO II:

For Professionals Who Want It All

If you demand maximum power, vehicle coverage, and advanced diagnostics, the IM608S II / IM608 PRO II is the tool for you.
The latest IM608 PRO II (also known as IM608S II) represents the top-tier model. It features upgraded hardware and software, combining powerful IMMO functions, key programming, OE-level diagnostics, and advanced service functions — all in one professional-grade tablet.

✔ High-Performance Hardware	✔ Broad Vehicle Coverage
✔ Enhanced Usability	✔ XP400 Pro Integration
✔ Professional ECU Coding	✔ 40+ Maintenance Functions
✔ FCA AutoAuth & Cloud Reports	✔ Top-Tier IMMO & Key Programming

📊 Comparison Overview

🛠️ IMMO Functions:
IM608 PRO II = IM508S PRO > IM508S > KM100

🔍 Diagnostic Functions:
IM608 PRO II > IM508S PRO = IM508S
(IM608 Series ≈ Autel MS908, IM508 Series ≈ Autel MK808)

🧰 Service Functions:
IM608 PRO II > IM508S PRO = IM508S > KM100

💻 Hardware Performance:
IM608 PRO II > IM508S PRO = IM508S > KM100

View the comparison table below.

	KM100	IM508S	IM508S PRO	IM608 PRO II
			= IM508S + XP400PRO	Same As IM608S II

Hardware
Appearance	Touch screen handset	Touch screen tablet	Touch screen tablet	Touch screen tablet
Connection	Bluetooth	OBD Cable	OBD Cable	JVCI+
Processor	PX30 4x ARM Cortex-A35	Cortex-A55 processor	Cortex-A55 processor	Qualcomm SDM660 Octa-core
Screen	5.5-inch	7-inch	7-inch	10.1-inch
WiFi	√	√	√	√
Bluetooth	√	×	×	V5.0+BR/EDR
System	Android 9.0	Android 11.0	Android 11.0	Android 10.0
Memory	2G+64G	4G+64G	4G+64G	4G+128G
Battery	4950mAh	5000 mAh	5000 mAh	15000 mAh
Microphone	×	×	×	1MIC
Headphone Jack	×	×	×	√
Loudspeaker	×	×	×	2
GPS	×	×	×	√
Camera	×	×	×	16.0 Megapixel
Programmer	×	XP200	XP400PRO	XP400PRO
Diagnostic Functions
Diagnostic Level	×	Basic	Basic	Medium
Auto Scan	√	√	√	√
Reading/ Erasing codes	×	√	√	√
Read Live Data	×	√	√	√
Read Freeze Data	×	√	√	√
Bi-directional Control (Active Tests)	×	√	√	√
Report Manage	×	√	√	√
Services	×	√ 28+	√ 40+	√ 40+
Reading/Writing Engine ECU info	×	Only Reading	Only Reading	√
Online Coding	×	×	×	√ (Mercedes-Benz vehicles are not covered)
Offline Coding	×	×	×	√
Guided Function	×	×	×	√ (Mercedes, BMW, JLR vehicles are not covered)
ECU Online Programming	×	×	×	√(Part of BMW/Benz)
ECU Offline Programming	×	×	×	√
Programmer Functions
Universal Key Generation	√(in 60 seconds)	√	√	√
Transponder Generation	√	√	√	√
Transponder Reading & Editing & Cloning	√	√	√	√
Transponder Simulation (Chip: ID46, ID47, ID48, ID49, ID4A, ID8A)	√	√ via APB112	√ via APB112	√ via APB112
Frequency Detection	√	√	√	√
Ignition Coil Detection	√	√	√	√
IMMO Functions
IMMO Scan	√	√	√	√
Key/Remote Learning	√(limited via OBD)	√	√	√
Retrieve IMMO Data, Backup/Restore IMMO Data	×	√	√	√
IMMO ECU Reset / Adaptation / Refresh / Coding	×	√	√	√
		XP200	XP400PRO	XP400PRO
Reading/Writing EEPROM	×	√	√	√
Reading/Writing MCU	×	√ (basic)	√ 3000+	√ 3000+
Reading/Writing IMMO ECU	×	√ (only reading)	√	√
Remote Frequency Detect & Support PC	×	×	√	√
IC CARD & MC9S12 Encryption Chip Read/Write	×	×	√	√
Other Functions
		Remote Desk	Remote Desk	Remote Desk SCAN VIN License
In-Vehicle Network (IVN)	×	CAN FD(Adapters required)(Except NA)	CAN FD(Adapters required)(Except NA)	D-PDU/RP1210/DOIP/CAN FD
Remote Expert	×	×	×	√

By now, you’ve explored the key differences between the IM608 PRO II, IM608S II, IM508S, and KM100 — and hopefully found the perfect tool that fits your needs and budget.

If you’re confident in your choice, you can move forward with confidence knowing you have the right Autel IMMO tool to tackle your automotive diagnostics and key programming tasks.

However, if you have special requirements or unique vehicle models that need support beyond what’s listed here, please don’t hesitate to contact us directly. Our experts are ready to help you find the exact Autel IMMO tool that meets your specific needs.

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Your perfect key programming solution is just a message away!

[2-Yr Plan] IM608S II

[1-Yr Plan] IM608S II

[2-Yr Plan] IM508S PRO

[1-Yr Plan] IM508S PRO

[2-Yr Plan] IM508S

[1-Yr Plan] IM508S

[Lifetime Free] KM100