1.Connect the DLC cable of diagnostic tool to the data link connector (16 pins) in driver side crash pad lower panel, turn the power on diagnostic tool.

2.Select the 'S/W Management' and 'Car model'.
3.Select the 'Smart Key Unit' and 'Smart Key Code Saving'.

4.Follow the instructions on the screen.

Smart Key Diagnostic
Smart Key UnitHyundai Tucson (NX4) 2022-2026 Owner's Manual: High beam indicator light. High Beam Assist indicator
light. Cruise indicator light
High beam indicator light
This indicator light illuminates:
When the headlights are on and turn
signal lever is moved to high beam
position.
When the turn signal lever is pulled
into the Flash-to-Pass position.
High Beam Assist indicator
light
This indicator light illuminat ...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Specifications
- Specifications
DescriptionSpecificationsLimit
General
TypeIn-line, DOHC 
Number of cylinders4 
Bore88.5 mm (3.484 in.) 
Stroke101.5 mm (3.996 in.) 
Total displacement2497 cc (152.38 cu.in.) 
Compression ratio13 : 1 
Firing order1-3-4-2 
Valve timing
Intake valveOpens (AT ...