OEX Alternator 12V 100A Denso Style – DXA4178
The OEX Alternator DXA4178 is a reliable 12V, 100-amp Denso-style alternator designed as a direct OE replacement. Built for stable and efficient charging performance, this unit is suitable for vehicles requiring consistent electrical output under standard driving conditions.
Manufactured using high-quality components and built under ISO-certified production standards, the DXA4178 delivers dependable performance, long service life, and strong durability across passenger and light commercial applications.
Key Features
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100A charging output – ideal for standard vehicle electrical systems
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Denso-style design – OE replacement fitment
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Internal voltage regulator for stable charging performance
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Twin-leg mount configuration for correct installation
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4-groove pulley system (application dependent)
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Brand new unit – not remanufactured
- 3-year passenger / 1-year commercial warranty
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Important note: Two visually similar variants exist with different regulator functions – always confirm by OE number before purchase
Specifications
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Voltage: 12V
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Output: 100 Amp
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Suits Unit Make: Denso Style
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Regulator Type: Internal
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Pulley Section: 4 Groove
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Mount Type: Twin Leg
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Mount Centres: 160mm
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Inside Mounting Legs: 36mm
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Pivot Hole Diameter: M10 x 1.25
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Adjusting Hole Diameter: M8 x 1.25
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Pin Code: IR169
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Unit Type: New
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Part Number: DXA4178
Vehicle Applications
Commonly fitted to:
- Toyota Corolla (selected 2015 models)
- Toyota iQ (2009–2015 models)
- Various 12V 100A Denso-style OE applications
(Always confirm compatibility using DXA4178 and OE alternator specifications before purchase due to multiple similar variants.)
Performance & Reliability
The DXA4178 alternator is engineered to support essential vehicle systems including ignition, lighting, air conditioning, and infotainment.
Its 100A output ensures stable battery charging and reliable performance in everyday driving conditions, making it a dependable replacement for worn OE alternators.
Why Choose OEX?
- Trusted aftermarket brand across Australia & New Zealand
- Designed for OE-level fitment and performance
- Manufactured in ISO-certified facilities for consistent quality
- Built for passenger and light commercial applications
- Backed by strong nationwide warranty support
