ABS/ASR Hydraulic Unit
SKU:
307023
$1,878.00
- Type: A vital electronic and hydraulic component that forms the core of the vehicle’s Anti-lock Braking System (ABS) and Anti-Slip Regulation (ASR) also known as Traction Control. It is an intricate assembly responsible for precisely controlling brake fluid pressure to each wheel independently.
- Function: The primary functions of this ABS/ASR Hydraulic Unit are critical for vehicle safety, stability, and control:
- ABS (Anti-lock Braking System): During hard braking, it rapidly modulates brake fluid pressure to individual wheels to prevent them from locking up. This allows the driver to maintain steering control and reduce stopping distances on slippery surfaces.
- ASR (Anti-Slip Regulation / Traction Control): During acceleration, it detects wheel spin and selectively applies the brakes to the slipping wheel(s) and/or reduces engine power to restore traction and maintain vehicle stability, especially on low-grip surfaces or during aggressive acceleration.
- Electronic Stability Program (ESP/MSP – Maserati Stability Program): In conjunction with the ABS/ASR control module (often integrated), it forms the hydraulic actuator for the full Electronic Stability Program, which intervenes during oversteer or understeer situations to help keep the vehicle on its intended path.
- Components: The hydraulic unit typically consists of:
- Hydraulic Block/Manifold: Contains a series of electrically controlled solenoid valves (one or more per brake circuit) that open and close rapidly to regulate fluid pressure.
- Electric Pump: A high-pressure electric pump that re-pressurizes the brake fluid that is momentarily released by the valves back into the brake lines.
- Accumulators: Small reservoirs to store pressurized fluid.
- Note: This unit often comes with, or is designed to integrate with, the ABS/ASR Electronic Control Unit (ECU/Module), which is the “brain” that sends commands to the hydraulic unit based on sensor input. Some part numbers may include both, while others are just the hydraulic block.
- Location: Typically mounted within the engine bay, often near the master cylinder, and connected to the brake lines.
- Material: Constructed from durable metals (e.g., aluminum, steel) for the hydraulic manifold and pump housing, with precision-machined internal components, high-quality seals, and robust electrical connections.
- Design: A highly complex and precisely calibrated electromechanical device, specifically engineered to the braking and stability performance requirements of the Maserati GranCabrio and GranTurismo, ensuring rapid response times and accurate pressure modulation.
Wheel Bearing
SKU:
197118
$731.00
- Type: A precision-engineered component that allows the vehicle’s wheel to rotate smoothly with minimal friction while supporting the entire weight of the vehicle and enduring significant forces (radial, axial, cornering). For these Maserati models, this part number typically refers to a complete wheel bearing assembly, which often includes the bearing unit itself and sometimes an integrated hub or mounting flange. It is typically a sealed unit, designed for long-term, maintenance-free operation.
- Function: The primary functions of the wheel bearing assembly are critical for vehicle dynamics, safety, and ride quality:
- Smooth Rotation: Enables the wheel to rotate freely and silently around the axle.
- Load Support: Bears the entire static weight of the vehicle and dynamic loads generated during driving (braking, acceleration, cornering forces).
- Steering & Handling: Maintains the precise alignment of the wheel, which is crucial for accurate steering response and stable handling.
- Reduced Friction: Minimizes friction during rotation, improving fuel efficiency and reducing heat generation.
- ABS/Traction Control Integration: Often incorporates the reluctor ring or magnetic encoder for the ABS (Anti-lock Braking System) and Traction Control system, which transmits wheel speed data to the vehicle’s control modules.
- Components: A typical sealed wheel bearing assembly for these applications includes:
- The bearing itself (e.g., a double-row ball bearing or tapered roller bearing)
- Integrated races and seals
- Often, an outer flange or hub that bolts directly to the suspension components and where the wheel is mounted.
- It does NOT typically include the wheel hub nut, brake rotor, or wheel studs unless specified as a complete wheel hub and bearing kit.
- Location: Integrated into the wheel hub assembly at each corner of the vehicle (front and/or rear axles, depending on the specific application for this part number, which is generally universal for a given axle type on these platforms).
- Material: Constructed from high-strength, hardened steel alloys for the races, rollers/balls, and inner/outer rings, designed to withstand extreme loads and high rotational speeds. Seals are made from durable rubber or composite materials.
- Design: Precisely manufactured to extremely tight tolerances to ensure minimal run-out, optimal concentricity, and long service life, crucial for the performance and refinement expected of a Maserati.