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  4. KEYDIY B20-4 Universal Keyless Entry Remote 4-Button Hyundai Kia Style - B Series Fob, 3+1 with Rear Panic, No Chip - Aftermarket · New
KEYDIY B20-4 Universal Keyless Entry Remote 4-Button Hyundai Kia Style - B Series Fob, 3+1 with Rear Panic, No Chip - Aftermarket · New

KEYDIY B20-4 Universal Keyless Entry Remote 4-Button Hyundai Kia Style - B Series Fob, 3+1 with Rear Panic, No Chip - Aftermarket · New

SKU: B01239

$7.58
 27.00
  • 300-500 MHzFrequency
  • 4-buttonButtons

Ships the next working day if you order within 8 hours 23 minutes

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Specifications

KEYDIY B20-4 (B20-3+1) universal remote fob, Hyundai / Kia style, B Series: Lock, Unlock, Trunk, rear Panic, chip slot, no blade.

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Aftermarket · New

KEYDIY B20-4 Universal Keyless Entry Remote 4-Button Hyundai Kia Style

KEYDIY B Series · rounded Hyundai / Kia fob with chrome sides · Lock, Unlock, Trunk on the face, Panic on the back · chip slot · no blade

3+1
Buttons
300-500 MHz
Set at generation
6
KEYDIY generators
CR2032
Battery, not included

⭐ The KEYDIY B20-4, sold as B20-3+1 as well, is a stand-alone remote fob in the rounded Hyundai / Kia shape with chrome side rails and a key-ring loop. Lock, Unlock and Trunk sit on the front pad and a red Panic button on the back. It has no blade and no transponder on the board: a KEYDIY generator writes the remote data, and a chip slot takes the car's transponder where one is needed.

⚙️ Key features

Panic kept off the front

The red horn button sits alone on the rear cover, so it is not pressed by accident in a pocket.

Frequency chosen by the device

Written at generation inside about 300-500 MHz, with 315 and 433 MHz both available from one part.

Chip slot without opening

A small glass or carbon transponder goes in without taking the fob apart.

Six KEYDIY generators

Made on KD-X2, KD-MAX, KD900, KD900+, KD-Mini and KD-X4.

💎 Benefits

One fob for many 3+1 jobs

Covers the stand-alone 4-button remotes the KD app lists for this shape.

Lighter remote stock

Replaces several fixed-frequency fobs with one blank on the shelf.

Customer's chip moves over

Where the immobiliser allows it, the original transponder goes into the slot.

Coverage grows in the app

KEYDIY keeps adding remote profiles to the KD database.

👥 Who it's for

Automotive locksmiths

Replacement stand-alone fobs for cars that keep a separate ignition key.

Key and remote counters

A single 3+1 blank instead of several make-specific fobs.

Mobile technicians

A fob that is generated on site from the KEYDIY device in the van.

🧰 Supported coverage

🧰 KEYDIY GENERATORS
Generators
KD-X2, KD-MAX, KD900, KD900+, KD-Mini, KD-X4
Remote data
Frequency and button codes written at generation
Database
KD app vehicle list, updated by KEYDIY
🔑 FUNCTIONS
Frequency
About 300-500 MHz, set to the car (315 and 433 MHz included)
Transponder
Not on board, slot for a small glass or carbon chip
Chip options
Original chip or KEYDIY Super Chip
🎨 SHELL STYLE
Look
Rounded Hyundai / Kia remote fob, chrome sides
Layout
Lock, Unlock, Trunk on the front; Panic on the back
Blade
Fob only, no blade slot
Coverage is set by the KD app: look the car up on the generator and use the B20-4 only where the app calls for this 3+1 fob.

📦 What's included

✅ IN THE BOX

✔ 1 × KEYDIY B20-4 (B20-3+1) universal remote fob, 4 buttons

❌ NOT INCLUDED

✘ Key or blade (fob only)

✘ Transponder chip

✘ CR2032 battery

✘ KEYDIY generator

📋 Specifications

📡 REMOTE
Model
B20-4 (B20-3+1)
Series
KEYDIY B Series (wired remote)
Buttons
4 (3+1)
Button functions
Lock, Unlock, Trunk (front), Panic (back)
Key type
Stand-alone keyless entry fob, Hyundai / Kia style
Frequency
Adjustable at generation, about 300-500 MHz (310, 313, 314, 315 and 433 MHz)
🔐 TRANSPONDER AND BLADE
Transponder chip
Not on board; slot takes a small glass or carbon chip, no disassembly
Blade
Not applicable (fob only)
🔋 POWER
Battery
CR2032 (not included)
📦 GENERAL
Weight
60 g
Condition
Aftermarket · New
Brand
KEYDIY

🛠️ Programming instructions

🔌GENERATE WITH A KEYDIY DEVICE, THEN ADD TO THE CAR

The B20-4 arrives blank: a KEYDIY device gives it the car's remote data, then the car learns it like the original fob.

Find the profile: on the generator or in the KD app, select make, model and year, or the original remote, and check it names this 3+1 fob.
Generate: connect the B20-4 and write the frequency and the four button codes.
Transponder: where the car needs one, slide the original chip or a KEYDIY Super Chip made for the car into the slot.
Learn to the car: use the car's own remote learn procedure or your diagnostic tool, as for the original fob; a new chip goes through your immobiliser tool.
Test: check Lock, Unlock, Trunk and the rear Panic button before handing the fob over.
Check coverage first: support depends on the tool's software version and the exact model year. Look the car up in the current KD database first: the B20-4 only replaces remotes the app lists for it.

Frequently Asked Questions

Common questions about this product

A universal KEYDIY B Series remote fob in the rounded Hyundai / Kia shape, with Lock, Unlock and Trunk on the front and Panic on the back. It is blank from the factory; a KEYDIY generator writes the frequency and button codes of the remote it replaces.
No. Both names describe the same fob. The 3+1 form counts the three front buttons and the separate Panic button on the rear cover, while B20-4 simply counts four buttons. Order either code and you receive this same black fob with chrome sides.
KD-X2, KD-MAX, KD900, KD900+, KD-Mini and KD-X4. Open the car or the original remote on the device or in the KD app, check that the profile asks for this 3+1 fob shape, then connect the B20-4 and run the generation as usual.
Not on its board, as with every B Series remote. It has a slot for a small glass or carbon transponder that is reached without opening the housing, so the original chip can move across or a KEYDIY Super Chip made for the car can go in.
No frequency is fixed at the factory. The generator writes the one used by the original remote, inside a range of about 300 to 500 MHz that includes 310, 313, 314, 315 and 433 MHz, so a single part serves different markets.
No. The B20-4 is a stand-alone fob with no blade and no folding head. The car keeps its own mechanical or transponder key for the ignition, and the fob takes over the lock, unlock, trunk and panic functions once it is learned.
No. The style describes the housing only. The B20-4 replaces whichever remotes the KD app links to this 3+1 shape, from any make, so look the car up in the current database on your device before you quote the job.
One CR2032 lithium cell, sold separately. Insert a fresh cell before generation, because the board has to answer the KEYDIY device during the write, and keep it fresh for the learning procedure on the car, which a weak cell can interrupt.