Jaylec Black Series High Performance Upgrade Alternators – Built for 4×4 Power

Part Number: BKS-140UZFE

Vehicle Compatibility:

Toyota Landcruiser UZJ100 2UZ-FE
Lexus SC300 1UZ-FE
When your vehicle demands more than what the factory ever intended, the Jaylec Black Series High Performance Upgrade Alternator delivers the muscle to keep every accessory running strong—on the tracks, at camp, or deep in remote touring country.

Purpose-built for 4×4, performance, heavy-duty, and road-transport applications, the Black Series range is engineered for vehicles running high-demand electrical systems. From dual batteries to modern comms, lighting, and recovery gear, these alternators provide the reliable output needed to keep your adventure powered.

Why Upgrade to the Black Series Alternator?
Replaces the Standard 100A Alternator
A true upgrade for vehicles requiring additional charging capacity.
Higher Charge at Lower RPM
Designed to deliver strong charging output even at idle or low engine speeds.
Designed for Vehicles That Outgrow Their O.E. Alternator
Perfect for accessory-loaded 4WDs where factory charging systems fall short.
Higher Output at Lower Cut-In Speeds
Delivers strong charging performance right from idle, ideal for slow technical driving, winching, and long periods of idling at camp.
Built for High-Demand 4×4 Accessories
Capable of powering and maintaining charge while running:
Fridges & dual battery systems
Driving lights and upgraded lighting
Winches
Dual thermo-fans
Electric steering & injection systems
Air conditioning systems
Navigation, monitoring & comms equipment
Heavy-Duty Engineering for Harsh Conditions
Premium bearings, efficient cooling fans, and a rigorous design/testing process ensure the Black Series outperforms standard and many aftermarket units.

Hot & Cold Amperage Rated – Genuine Performance Data
The Jaylec Black Series is one of the few ranges rated both Hot and Cold, giving 4×4 owners realistic output expectations under real-world operating temperatures. This is a major advantage when reliability matters most.

COLD 13.5V @ 163A

HOT 13.5V @ 140A

Built to Outperform — Not Just Replace
With significantly improved electrical performance and durability, these alternators are crafted to replace and outperform the most popular high-output units on the market today. Whether you’re touring, towing, or pushing deep off-grid, the Black Series delivers dependable power when it counts.

Warranty Information – 4WD Applications
2 Years or 50,000km (whichever comes first)
Applicable to all 4WD installations.

Warranty Exclusions
The warranty does not cover alternators that have been:

Submerged in water
Used in vehicles with electrical loads of 85% or more of the alternator’s hot-rated output
Run with a lithium battery system without a DC-to-DC charger
Installed with wiring that has not been upgraded to handle the alternator’s increased output
These conditions ensure safe operation and protect the alternator from overload or improper installation.

Power Your 4×4 the Right Way
When you’re running serious gear, a stock alternator simply won’t keep up. Upgrade to the Jaylec Black Series High Performance Alternator and enjoy reliable, consistent charging for every adventure— no matter how demanding the load.

Oval Regulator Plug Check by OE Numbers Only

A couple of unit variations

We recommend this product be installed by a licensed Auto Electrician.

Specifications:

Voltage : 12V

Amperage : 140A

Mount Leg ID : 58mm

C-C Mounts : 164mm

Hole ID Top 10mm

Hole ID Bottom 10mm

Shaft Size : N/A

Pulley Type : 6PV, Fixed

Pulley Grooves : 6

Pulley Diameter : 62mm

Regulator Type : Internal

Connections Plug No.  : EP24

Terminals : B+, S, IG, L

Excitation : External

Ground : Negative

Weight : 9.0kg