Keydiy KD-X4 vs KYDZ Which is Better

Keydiy KD-X4 and KYDZ tool which is better? Here is the clue.

Overview of the Tools
KeyDIY KD-X4
The KD-X4 is an upgraded all-in-one device from KeyDIY, combining the capabilities of KD Max, KD Mate, and KD Mini Prog. It supports standalone operation or connectivity via Bluetooth/USB to apps or PCs, with features like UWB key detection, Toyota key unlocking, and MLB chip support.

 

KYDZ MQB MLB Tool
The KYDZ tool, often bundled as a 2-in-1 MLB+MQB set, focuses on VAG systems with solder-free adapters and Bluetooth OBD connectivity for phone-based operation. It calculates data from existing keys and generates dealer keys without MCU chip removal. Emphasizing ease for specific VAG models.

 

Key Features Comparison

Feature	KeyDIY KD-X4	KYDZ MQB MLB Tool
Primary Function	Universal key/remote recognition, generation, copying, programming, matching	MLB/MQB data calculation, dealer key generation for VAG (VW, Audi, Porsche, etc.)
Vehicle Coverage	Broad: Multiple brands (BMW BDC3, Toyota, VAG MQB49/5C, Ford, etc.)	Specialized: VAG MLB/MQB systems (2016+ models, incl. Prox, bladed, digital clusters)
Connectivity	Bluetooth, USB, app/PC software, standalone	Bluetooth OBD, phone app, solder-free adapters, optional PC
Ease of Use	Standalone for basics; app for advanced; multilingual (19 languages)	Phone-based; no hardware mods; shows CS/PIN directly
Additional Tools	Built-in antennas, OBD cable, adapters for Toyota/BMW/VAG	Solder-free adapters, OBD Bluetooth dongle, power supply, MLB/MQB keys
Price Range	$200–$300	$400–$500
Subscription/Tokens	Pay-per-use for some advanced features (e.g., points/coins)	Token-based for data collection (10-15 USD per token after initial)

Which is better?

Both Keydiy and KD-X4 will read original VAG MLB, MQB48, MQB49 5C/5D key data to add a spare key.

KYDZ’s lauded for streamlined setup and no need for hardware modifications. This tool gives you a completely solderfree solution, meanwhile Keydiy also having solder free adapters.

The reason why choose Keydiy over KYDZ:

Full-featured functionality.
Keydiy is more than just a simple version—it includes:
• Key data reader
• New key generator
• IMMO key programmer
• Supports many types of transponders
• Online software updates

• key availability especially BMW

These features make it ideal for professionals, not just hobbyists.

Just because a tool “does the same job as 5C/5D” to a limited extent, does not mean that it offers the full and safe operation, compatibility, updates, or wide coverage of car types that KeyDIY offers — and that is why many professionals prefer KeyDIY despite the price.

The “better” tool depends on your workflow. For general locksmiths handling diverse vehicles, the KeyDIY KD-X4 is superior due to its universal features, broader coverage, and cost-effectiveness, as echoed in reviews favoring it over specialized alternatives.

Read also:

http://blog.obdii365.com/2024/05/28/xhorse-vvdi-mlb-tool-vs-kydz-mlb-tool/

How to Open and Disassemble Audi MQB49 5D Key?

Here obdii365.com will share how to disassemble the Audi A3 style MQB49 5D smart key step by step.

 

NOTE:

To read original key data and add a spare Audi MQB49 5D smart key with Keydiy KD-X4 or Xhorse vvdi key tool plus, you must generate original 5D key only.

 

Procedure:

Press this small button to take out the mechanical key.

Use a flathead screwdriver to pry up the small clip, and the back cover will pop open.

Pry off this back cover.

Gently lift up and remove the battery.

Insert a screwdriver into this position and push down 3–5 mm to pry open the key casing.

Then pry open the two side edges.
Lift it a bit further.

Pull out the two side strips, being careful not to break them.

Next, pry open the inner casing of the key.
Pry up to this point—do not pry all the way to the bottom to avoid damaging the key.

Repeat the same steps on the other side.

At this stage, use a screwdriver to gently lift the key circuit board, then remove the board.

Add Skoda Scala 2022 MQB49 5C Key with Keydiy KD-X4

Keydiy KD-X4 MQB49-5C new user report:
Today successfully adding spare key to SKODA SCALA 2022 with MQB-5C half KESSY. All done with Keydiy KD-X4.

I didn’t solder the white cable to processor pin, I used needle instead.

Had to focus on right neddle position during data reading… I just solder spring needle on cable and touch first pin on left side of processor no big deal… for me its better way to avoid tearing off pin.

Apprx. 1 hour job.