OEX DXA4038 12V 140A Alternator Denso Style Twin Leg Mount

Professional-grade alternator engineered for reliable charging in Denso-compatible Australian vehicles.

Product Overview

The OEX DXA4038 is a brand-new 12V 140-amp alternator designed for vehicles originally equipped with Denso-style charging systems. Featuring external PCM regulation and a robust twin-leg mounting configuration, this alternator delivers consistent charging performance across passenger and light commercial applications. The unit features a 6-groove serpentine pulley with 53mm diameter, M10x1.5 pivot mounting, and 130mm centre-to-centre leg spacing for precise factory-equivalent fitment. Confirmation via original equipment number is essential before installation.

Key Specifications

• Output: 12V, 140 amps continuous power rating
• Mounting: Twin leg design, 130mm centre-to-centre spacing, 60mm inside leg measurement
• Pulley: 53mm outside diameter, 6-groove serpentine belt configuration
• Pivot hole: M10x1.5 thread, 11mm diameter
• Adjusting hole: 11mm diameter
• Regulation: External PCM-controlled (not internal regulator)
• Pin code: ER55 connector configuration
• Weight: 5.54kg
• Condition: New OEM-equivalent unit (not remanufactured)
• Warranty: 3 years passenger vehicle / 1 year commercial vehicle use

Features & Benefits

PCM-Regulated Design: External regulation provides precise charging control through your vehicle's powertrain control module, ensuring optimal battery management and electrical system protection across varying engine speeds and electrical loads.

Denso-Compatible Engineering: Direct replacement for Denso-style alternators commonly found in Japanese and select Asian-market vehicles, maintaining original mounting points and electrical connections for straightforward installation.

High-Output Capacity: 140-amp rating handles modern electrical demands including LED lighting upgrades, auxiliary power systems, dual battery setups, and aftermarket accessories without compromising charging performance.

Twin-Leg Mounting: Stable dual-point mounting system with 130mm spacing reduces vibration and bracket flex during operation, critical for alternators in 4WD applications experiencing corrugated roads and off-highway conditions.

Professional-Grade Construction: New-manufacture unit built to OEM specifications eliminates the reliability concerns associated with remanufactured cores, providing predictable service life in demanding Australian heat conditions.

6-Groove Pulley System: Multi-rib serpentine design maintains consistent belt tracking and reduces slip under high electrical loads, particularly valuable for vehicles running winches, UHF radios, and auxiliary lighting circuits.

Technical Specs

• Voltage: 12V DC
• Current output: 140A maximum
• Regulator type: External (PCM-controlled)
• Alternator style: Denso compatible
• Mount type: Twin leg
• Mount centre-to-centre: 130mm
• Inside mounting legs: 60mm
• Pivot hole: M10x1.5 thread / 11mm diameter
• Adjusting hole diameter: 11mm
• Pulley diameter: 53mm OD
• Pulley configuration: 6 groove serpentine
• Pin code: ER55
• Unit make compatibility: Denso
• Weight: 5.54kg
• Condition: New manufacture
• Warranty period: 3 years (passenger) / 1 year (commercial)

Frequently Asked Questions

How do I confirm this alternator fits my vehicle? Match your existing alternator's OE part number with OEX cross-reference data before ordering. Physical measurements and pin configuration must align exactly.

Does this work with internally regulated systems? No. This alternator requires external PCM regulation. Installing it on internally regulated systems will result in no charging output and potential electrical system damage.

What should I check before installation? Inspect all wiring harnesses for damage, verify PCM functionality, test battery condition, and confirm serpentine belt tension meets manufacturer specifications before fitting the new alternator.

Is professional installation required? Strongly recommended. Incorrect alternator installation or failure to diagnose underlying electrical faults can damage the PCM, battery, and vehicle electrical systems requiring expensive repairs.

What's covered under warranty? Manufacturing defects are covered for 3 years on passenger vehicles or 1 year on commercial applications. Warranty excludes damage from incorrect installation, electrical system faults, or environmental contamination.

Compatible With / Goes Well With

Denso-style alternator applications including select Toyota, Honda, Mazda, Mitsubishi, Nissan, and Subaru models (confirm via OE number match before purchase)

Complementary products:

• Serpentine drive belts (6-groove configuration)
• Battery terminals and cable upgrades
• Voltage regulators and electrical system diagnostics
• Alternator mounting brackets and hardware
• Battery isolators for dual-battery systems

Note: This alternator is NOT compatible with internally regulated systems. PCM function must be verified before installation.

Weight

5.54kg