Steering Knuckle Assembly 43212-KK010 43212KK010 For TOYOTA Hilux Revo GUN125 GUN126 GUN13# TGN126 Fortuner AN150 AN160 — OEM Genuine Left Front LH, 96mm Bearing Bore

The Steering Knuckle Assembly with OEM number 43212-KK010 is a verified TOYOTA Genuine left-hand (LH) front steering knuckle for the Hilux Revo (8th generation) and Fortuner II platforms. This component is the structural hub carrier that connects the front wheel hub to the upper and lower suspension arms and the steering tie rod. It dictates the mounting position of the wheel bearing, brake caliper, and steering arm, directly influencing wheel alignment geometry, steering response, and load-bearing integrity on these body-on-frame vehicles.

The 43212-KK010 is cataloged by TOYOTA as "KNUCKLE, STEERING, LH" (Code: 43212) and is the left-side counterpart to 43211-KK010 (RH). It is a cast iron component with a 96 mm wheel bearing bore, designed for the heavier duty-cycle demands of the Hilux Revo and Fortuner. This knuckle is a genuine OEM part, not an aftermarket casting, and is the correct replacement when the original knuckle is bent from impact, cracked at the strut or ball joint mounts, or has suffered bearing bore wear beyond service limits.

• OEM Genuine Status Verified: 43212-KK010 is confirmed as a TOYOTA OEM part across Partsouq, Amayama, Euro4x4parts, and multiple authorized Toyota parts catalogs.
• Position Verified: Front Axle, Left (LH) — confirmed by METZGER ("Einbauposition: Vorderachse links"), Euro4x4parts ("Left side"), and BOGAP ("Front Axle Left").
• Paired Counterpart Verified: 43211-KK010 (RH) is the matched right-side knuckle, confirmed across Partsouq and Amayama catalog data.
• Wheel Bearing Bore Verified: 96 mm — confirmed by METZGER technical data ("für Radlagerdurchmesser [mm]: 96") for the 43212-KK010 application.
• Material Verified: Cast Iron — confirmed by BOGAP aftermarket listing ("Material: Cast Iron") for the 43212-KK010 equivalent. (Note: one Chinese supplier lists "Steel" — the OE casting is cast iron; confirm with supplier if material certification is required.)
• Vehicle Coverage Verified: Confirmed for Hilux Revo (GUN125, GUN126, GUN135, TGN126, TGN136, etc.) and Fortuner II (AN150, AN160) from 05/2015 onward, with catalog coverage extending to 2026.
• Aftermarket Cross-Reference Verified: METZGER 58182901 (paired RH: 58183002), BOGAP T3341144, Euro4x4parts PVT1197 — all confirmed as aftermarket equivalents to OE TOYOTA 43212-KK010.

• Visible crack or deformation at the strut mount, ball joint taper, or tie rod arm: Impact damage (curb strike, pothole, accident) is the leading cause of knuckle replacement. A bent knuckle cannot be safely straightened.
• Wheel bearing bore wear or fretting: If the bearing race spins in the knuckle bore, the knuckle must be replaced — bearing replacement alone will not restore a worn bore.
• Inability to achieve correct wheel alignment: A bent knuckle prevents camber, caster, or toe from reaching specification, causing persistent tire wear and steering pull.
• Abnormal tire wear (cupping, shoulder wear): Geometry deviation from a damaged knuckle accelerates tire wear and reduces steering stability.
• Clunking or looseness at the front corner: A cracked knuckle or elongated ball joint taper can produce noise and unsafe play under load.
• Brake caliper misalignment: A bent knuckle can offset the caliper bracket, causing uneven pad wear or brake drag.

• KK010 vs. KK030 is the critical fitment boundary: Partsouq catalog data shows 43212-KK010 for GUN125/126/13# (ARL, TH markets) and 43212-KK030 for GUN11#/120/121/122/TGN11#/120/121. These are different castings for different Hilux Revo sub-variants. Provide the VIN or a photo of the original knuckle casting number before ordering.
• 2WD vs. 4WD: The confirmed applications are predominantly 4x4 / 4WD platforms (Euro4x4parts lists the 43212-KK010 equivalent for the GUN125 4x4 diesel). 2WD variants may use a different knuckle — confirm the drivetrain configuration.
• Wheel bearing replacement is mandatory with knuckle replacement: Platform-specific guidance states that for this steering knuckle to function correctly, the wheel bearing must be replaced — and this is explicitly a warranty condition. Reusing an old bearing in a new knuckle can lead to premature failure and may void warranty.
• Genuine vs. aftermarket: This listing is positioned as Genuine TOYOTA OEM. If an aftermarket alternative is acceptable, METZGER 58182901, BOGAP T3341144, and Euro4x4parts PVT1197 are documented cross-references, but confirm the buyer's requirement for OEM authenticity.

1. Confirm the correct variant first: Before removing the original knuckle, verify that the replacement is 43212-KK010, not 43212-KK030. Compare the casting number on the original unit.
2. Safety first: Park on level ground, engage parking brake, chock rear wheels. Loosen the front axle nut before raising the vehicle. Support the front corner securely on jack stands.
3. Remove the brake caliper and rotor: Support the caliper to avoid stressing the brake hose. Remove the rotor.
4. Remove the wheel bearing / hub: Press or pull the hub/bearing assembly from the knuckle. A new wheel bearing must be installed with the new knuckle — do not reuse the old bearing.
5. Disconnect the steering and suspension joints: Separate the tie rod end, upper ball joint, and lower ball joint from the knuckle using a proper separator. Do not hammer on the knuckle arms — cast iron can crack.
6. Remove the knuckle: Unbolt the strut/shock mount and any remaining fasteners. Extract the knuckle.
7. Transfer components: If any brackets, dust shields, or ABS sensor mounts are specific to the original knuckle, transfer them to the new unit.
8. Install the new knuckle: Position the 43212-KK010 knuckle, insert the strut mount bolts and ball joint studs. Torque all fasteners to the workshop manual specification — ball joint nuts and strut bolts are torque-critical.
9. Install a new wheel bearing and hub: Press the new bearing into the 96 mm bore and install the hub. Torque the axle nut to specification.
10. Reconnect brakes and steering: Reinstall the rotor and caliper. Reconnect the tie rod end. Check for any binding or interference through the full steering range.
11. Professional wheel alignment: Mandatory after knuckle replacement. Camber, caster, and toe must be reset to specification.
12. Road test: Test drive at low speed, listening for abnormal noise and checking for steering pull or vibration before returning the vehicle to service.

• Inspect the knuckle area at every suspension or brake service — look for cracks, impact marks, or bearing bore wear.
• Replace the wheel bearing whenever the knuckle is replaced — this is a platform-specific requirement and warranty condition for the Hilux Revo / Fortuner knuckle.
• Check wheel alignment after any impact event (curb strike, pothole, accident) — a bent knuckle may not be visually obvious.
• Do not attempt to straighten a bent knuckle — cast iron knuckles are not designed for cold or hot straightening and may crack.

• Standard packing: Genuine Toyota packaging where supplied; neutral heavy-duty carton for bulk export with rust-preventive wrapping.
• Package contents: 1 × Steering Knuckle Assembly (LH). Wheel bearing, hub, ball joints, tie rod ends, and mounting hardware are not included unless explicitly stated.
• Set options: Left side only / left + right pair (43212-KK010 + 43211-KK010) — specify at inquiry.
• Suitable for: Toyota Hilux Revo / Fortuner suspension and steering repair shops, 4x4 specialists, fleet maintenance departments, spare parts distributors, and export wholesalers serving Southeast Asia, the Middle East, Africa, and Latin America.
• Related parts available: 43211-KK010 (RH knuckle), front wheel bearings (96 mm bore), front hub assemblies, upper and lower ball joints, tie rod ends, and front strut assemblies.