Here is the description for the Mazda3 1.6 2010 (Z6 engine) auto gearbox:

Mazda3 1.6 Z6 Auto Gearbox (2010 Year) – Full Description

Vehicle Model: Mazda3 BK Series

Engine Code: Z6 (1.6L DOHC, 16-valve petrol)

Year: 2010

Transmission Type: 4-speed automatic transmission

Gearbox Code: Often referred to as FN4A-EL (Mazda designation; similar to Ford’s 4F27E)

Key Specifications:

• Transmission Type: 4-speed electronically controlled automatic with overdrive
• Gear Ratios:
  
• 1st: 2.816
• 2nd: 1.529
• 3rd: 1.000
• 4th: 0.705
• Reverse: 2.648
• 
  
• Torque Converter: Lock-up with electronically controlled shift logic
• Transmission Fluid: Mazda ATF M-V (equivalent to Ford Mercon V)
• Drive Type: Front-wheel drive (FWD)
• Common Features:
  
• Electronic control unit (TCM integrated or separate)
• Solenoid-controlled shifting
• Compatible with ABS and traction control systems
• 
  

Common Parts Attached:

• Transmission control solenoids
• Valve body
• Torque converter
• Speed sensors
• Transmission mount brackets
• Shift cable bracket
• Oil pan with drain plug

Fitment Compatibility:

• Mazda3 BK 1.6L Z6 2004–2010
• Some Ford Focus 1.6 (same 4F27E gearbox)

Let me know if you need wiring diagrams, ECU matching, or gearbox pinouts.