OE Quality
60-Day Returns

Nugeon 99P01631B Disc Brake Caliper - Rear Left
Reliable Disc Brake Caliper for Lexus RX300
The Nugeon TechShield 360 (tm) Disc Brake Caliper (Part Number 99P01631B) is engineered to provide consistent braking performance for your Lexus RX300. Designed with durable materials and precise specifications, this caliper ensures dependable stopping power and long-lasting service.
- Compatible with Lexus RX300 models
- Constructed from cast iron for strength and durability
- Includes mounting hardware, bleeder screw, and caliper slides
- Equipped with a single steel piston (40 mm diameter)
- Features a gray E-coat finish for corrosion resistance
- Includes bracket with Aisin casting number 1702809
- Banjo bolt inlet fitting with M10-1.0 thread size
- Bleeder screw with M7-1.0 thread and cap included
- Dust boots included to protect internal components
About the TechShield 360 (tm) Product Line
The TechShield 360 (tm) line by Nugeon focuses on delivering brake hydraulics components that combine robust materials and protective finishes. This disc brake caliper benefits from the TechShield 360 (tm) technology, which includes an E-coat finish to resist corrosion and extend the caliper's operational life, making it suitable for demanding driving conditions.
Detailed Product Description
This disc brake caliper is manufactured with a cast iron housing and a single steel piston measuring 40 mm in diameter, providing reliable hydraulic pressure for effective braking. The gray E-coat finish offers enhanced protection against rust and environmental wear. Included components such as the bleeder screw (M7-1.0 thread) with cap, caliper slides, and dust boots ensure proper function and ease of maintenance. The caliper bracket, cast with Aisin number 1702809, is included to facilitate secure mounting. The inlet fitting uses a banjo bolt with an M10-1.0 thread size, compatible with standard brake lines for the Lexus RX300.
Common Applications and Issues Addressed
- Replacement for worn or damaged disc brake calipers on Lexus RX300
- Resolves brake fluid leakage due to faulty bleeder screws or seals
- Addresses uneven brake pad wear caused by sticking caliper slides
- Improves braking response when original caliper piston is corroded or seized
- Prevents corrosion-related failures with E-coat finish protection
Installation Notes and Tips
Ensure the brake system is properly bled after installation to remove air from the hydraulic lines. Verify that the bleeder screw and cap are securely installed to prevent fluid leaks. Use the included bracket for correct caliper positioning and torque mounting bolts to manufacturer specifications. Inspect dust boots and caliper slides for proper fit to maintain smooth piston operation.
Quality Assurance and Warranty
This Nugeon TechShield 360 (tm) disc brake caliper is manufactured by Aisin, a reputable OEM supplier known for quality automotive components. The caliper undergoes strict quality control to meet industry standards. While specific warranty details are not provided, products from this line typically carry coverage against manufacturing defects. Consult your supplier for exact warranty terms.
| Brand | Nugeon |
|---|---|
| Part Number | 99P01631B |
| Position | TechShield 360 (tm), Rear Left |
| Mounting Hardware Included | Yes |
| Pads Included | No |
| Caliper Casting Material | Cast iron |
| Bleeder Screw Included | Yes |
| Caliper Slides Included | Yes |
| Piston Quantity | 1 |
| Friction Materials Standards Institute Pad Number | D325 |
| Inlet Fitting Type | Banjo bolt |
| Caliper Color | Gray |
| Piston Material | Steel |
| Anti-Squeal Shims Included | No |
| Bleeder Screw Cap Included | Yes |
| Bleeder Screw Size | M7-1.0 |
| Bleeder Screw Thread (mm) | M7-1.0 |
| Bleeder Thread Size | M7-1.0 |
| Bracket Cast Numbers | Aisin 1702809 |
| Bracket Included | Yes |
| Bracket Mounting Bolts Included | No |
| Caliper And Pad Hardware Included | Yes |
| Caliper Finish | E-coat |
| Caliper Manufacturer | Aisin |
| Dust Boots Included | Yes |
| Housing Cast Numbers | 40-10 l |
| Inlet Thread Size | M10-1.0 |
| Package Contents | Includes brake pad installation hardware w/ banjo bolt & copper c |
| Piston 1 Outside Diameter (in) | 1.57 |
| Piston 1 Outside Diameter (mm) | 40 |
| Wear Sensors Included | No |
This part fits 5 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2003 | Lexus | RX300 | Rear Left | Supplied w/ Mounting Bracket; TechShield 360 (tm) |
| 2002 | Lexus | RX300 | Rear Left | Supplied w/ Mounting Bracket; TechShield 360 (tm) |
| 2001 | Lexus | RX300 | Rear Left | Supplied w/ Mounting Bracket; TechShield 360 (tm) |
| 2000 | Lexus | RX300 | Rear Left | Supplied w/ Mounting Bracket; TechShield 360 (tm) |
| 1999 | Lexus | RX300 | Rear Left | Supplied w/ Mounting Bracket; TechShield 360 (tm) |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.