57700-FD101
Kia
57700-FD101
Kia
2011, 2010, 2009, 2008, 2007, 2006
Chassis System
Steering Gear / Rack and Pinion
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Product Description
The 57700-FD101 is a hydraulic power-assisted rack and pinion steering gear assembly designed for second-generation Kia Rio models. Certified to IATF16949 automotive safety standards, this component is assembled to Mobis/Hyundai-Kia steering system OEM specifications. It is suited for commercial procurement clients including auto parts distributors, repair service providers, and fleet management operators. Each unit undergoes strict pressure decay testing before shipment to support long-term performance and reduce repeat maintenance costs for business operations.
Parameter Category | Details |
OE Number | 57700-FD101 |
Official OEM Name | GEAR ASSY-STEERING / STEERING RACK AND PINION ASSEMBLY |
Interchange OEM Numbers | 57700-FD101, 57700FD101, RACK-FD101 |
Applicable Vehicles | Kia Rio QB/JB (Second Gen) (2006-2011) |
Steering System Type | Rack and Pinion — Hydraulic Power Assisted (HPS) |
Mount Position | Crossmember/subframe mounted underneath vehicle (steering gear location varies by FWD/RWD layout) |
Input Connection | Universal joint coupler from steering column intermediate shaft (lower shaft) |
Output Connection | Two tie rod ends (inner) thread into rack piston left/right sides |
Turns Lock-to-Lock | Approximately 2.5-3.5 turns (varies by rack gearing ratio and vehicle) |
Overall Rack Length | Approx 700-900 mm (varies by vehicle track width and packaging) |
Rack Housing Diameter | Approx 40-50 mm |
Pinion Shaft | Splined input shaft (matched to U-joint yoke spline count) |
Net Weight | Approx 6.5-11.0 kg (14.3-24.3 lbs) depending on hydraulic/electric assist type |
Package Size | 950 x 150 x 200 mm with protective caps on tie rod threads and input spline |
Rack Bar Material | Induction-hardened carbon steel rack bar (precision-cut machine teeth along full length) |
Rack Housing Material | Aluminum alloy die-casting (lightweight) or steel tube construction (hydraulic models) |
Pinion Shaft Material | Case-hardened alloy steel supported by sealed ball bearings or needle bearings |
Hydraulic Cylinder Structure | Integrated cylinder bore with hard-chromed piston surface (HPS models) or electric motor + ball-nut drive mechanism (EPS models) |
Seal Material | Nitrile and fluorine rubber O-rings and lip seals throughout (critical for power assist integrity) |
Tie Rod Threads | Rolled threads on rack bar ends (left-hand and right-hand thread pair) |
Production Standard | Assembled to Mobis/Hyundai-Kia steering system OEM specification; compliant with IATF16949 automotive safety-critical steering component certification |
Quality Assurance | 100% rack tooth lead error inspection and hydraulic pressure decay test before shipment |
Alternative Aftermarket Part Numbers | RACK-HPS, SG-57700-FD, STEER-D101 |
The meshing interface between helical-cut pinion gear teeth and linear rack bar teeth is manufactured to DIN or JIS gear quality standards, with an accuracy class of Q7-Q9. The controlled tooth profile geometry supports consistent steering ratio, minimal backlash, and smooth operation across the full lock-to-lock steering input range. Deviations from these specifications may result in vague steering feel, off-center steering wheel position sensitivity, or unstable handling at highway speeds.
For HPS configurations, an engine-driven power steering pump supplies pressurized hydraulic fluid (typically 80-120 bar) to either side of an integral double-acting cylinder piston attached to the rack bar. Hydraulic force amplifies driver steering input force by 15-20x, enabling low-speed parking maneuverability with reduced steering wheel effort.
Multiple sealing components protect internal assembly parts: a rotary shaft seal at the pinion input blocks dirt ingress and prevents fluid egress, rack bar bushing seals maintain lubrication and exclude contamination, cylinder end seals contain hydraulic pressure, and tie rod thread protection caps prevent shipping damage and corrosion prior to installation. Individual seal degradation can lead to progressive system performance decline over time.
Replacement of the steering gear assembly addresses common steering system issues, including excessive steering wheel free play from worn rack teeth or loose rack bushings, heavy steering effort from internal seal failure or spool valve wear, off-center steering wheel position from bent rack bars, and steering fluid leakage from damaged seals or housing. Professional wheel alignment is mandatory after replacement. Technicians should flush and refill power steering fluid per manufacturer specifications after installation.
This steering gear assembly fits the Kia Rio (Pride/K2) model line, covering model years 2006 through 2011. The component belongs to the chassis system category, with a part type classification of steering gear / rack and pinion. Buyers may cross-reference the OEM part number with their vehicle VIN through authorized dealers to confirm fitment for specific configurations.
This is an aftermarket replacement part manufactured to meet or exceed OEM specifications for fit, form, and function. It is available at a more competitive price point compared to genuine OEM parts.
Compatible vehicles are listed in the application section. For vehicles not listed, buyers may contact customer support with their VIN number for fitment verification.
Standard automotive hand tools are sufficient for most installation procedures. A torque wrench is recommended to ensure all fasteners are tightened to factory specifications. Buyers may refer to the professional service manual for their vehicle model for detailed instructions.
Warranty coverage follows the official warranty policy, and applies to manufacturing defects under normal use conditions. Improper installation, racing use, or product modifications void the warranty.
Replacement of related wear items (including seals, gaskets, and tie rod ends) during installation is recommended to support optimal performance and balanced operation, and to avoid repeated labor costs for commercial service operations.
For commercial procurement and bulk orders, this product supports a minimum order quantity of 500-1000 units. Packaging options include genuine Mobis standard packaging, neutral aftermarket packaging, and branded packaging to accommodate different operational requirements for distributors and repair service networks.
