Description
For a modern car like the 2018 Voxy, “Grade A” is the highest tier of Ex-Japan parts. These are pulled from vehicles with minimal mileage, often because of minor cosmetic write-offs in Japan.
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Bearing Health: At this grade, the internal ball bearings and races show virtually no “pitting” or wear. The original Japanese high-temp grease is usually still perfectly intact.
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Physical Integrity: Unlike lower-grade used parts, these units have minimal surface oxidation on the 5-lug flange, ensuring a perfect, flush fit against your brake discs.
Electronic Precision (Hybrid & VSC)
The 2018 Voxy is packed with computer-aided safety. The rear hub acts as the “eyes” for:
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Regenerative Braking (ZWR80 Hybrid): The ECU uses this hub’s speed data to manage how much electricity to recover during braking. A faulty or “cheap” sensor can reduce your hybrid system’s efficiency and fuel economy.
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Safety Suite (Toyota Safety Sense): Systems like Traction Control and Electronic Brakeforce Distribution (EBD) rely on the digital “pulse” from this hub’s magnetic encoder. This Grade A unit uses the original Denso/Advics sensor, ensuring no “ghost” ABS lights on your dashboard.
2WD vs. 4WD Mechanicals
The 2018 Voxy comes in two main rear configurations:
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ZRR80/ZWR80 (2WD): The hub is a “dead” unit (solid center) designed to minimize rotational weight and maximize fuel efficiency.
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ZRR85 (4WD): The hub features a hollow, splined center to accept the rear driveshaft.
Performance & Longevity
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Silent Operation: Replacing a worn hub with this genuine unit eliminates the low-frequency “drone” or humming noise that often develops above 60 km/h.
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Direct Bolt-On: This is a 4-bolt flange design. It requires no hydraulic pressing during installation, which protects the bearing from the accidental damage often caused by mechanics using hammers or presses on non-unitized bearings.
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