LANDNOVO LR035471 Active Anti-Roll Control Pump for Land Rover Range Rover L405 & Sport L494 | Factory Remanufactured – 100% Restored to OE Specification
LR035471 Active Anti-Roll Control Pump: The Core Chassis Technology Behind Land Rover Range Rover and Range Rover Sport
As the central hydraulic component of the active anti-roll system fitted to the Land Rover Range Rover (L405) and Range Rover Sport (L494), the LR035471 Active Anti-Roll Control Pump plays a critical role in vehicle stability, handling, and driving safety. This article provides an in‑depth technical overview of the pump, the system it serves, common failure modes, and essential maintenance practices for workshops and technicians.
1. System Overview: What Is the Active Anti‑Roll System?
Land Rover's active anti‑roll system is widely known within the industry as ACE (Active Cornering Enhancement). It is an advanced chassis technology that actively counteracts body roll during cornering using hydraulic actuation.
Unlike a conventional passive anti‑roll bar, the ACE system can generate a counter‑torque during turns to oppose the centrifugal force that causes body roll. Its primary goal is to deliver a stable, controlled driving experience under two extreme conditions:
- High‑speed highway driving – where minimal body roll enhances driver confidence.
- Low‑speed off‑road manoeuvring – where the system adapts to uneven terrain for maximum wheel articulation.
The ACE system is deeply integrated with the vehicle's air suspension and Terrain Response systems, meaning that faults in any one subsystem can trigger diagnostic trouble codes in others.
2. The Role of LR035471 in the ACE System
The LR035471 pump is the hydraulic power source for the entire ACE system. Its primary function is to deliver pressurised hydraulic fluid to the active anti‑roll bars.
How it works:
- Hydraulic supply – The pump continuously supplies high‑pressure fluid to the active roll‑bar actuators.
- Pressurisation and stiffening – The pressurised fluid enters the roll bar, increasing its stiffness to reduce body lean.
- Electronic control – The pump's operation is regulated by the vehicle's Electronic Stability Control (ESC) unit, which monitors vehicle speed, yaw rate, and lateral acceleration in real time to calculate the required anti‑roll torque.
- Execution and feedback – Based on these calculations, the system adjusts the pump output pressure, thereby modulating roll‑bar stiffness for precise body control.
3. LANDNOVO – Factory Remanufactured, 100% Restored to OE Function
The LANDNOVO LR035471 is a premium factory-remanufactured active anti-roll control pump. Each unit is meticulously rebuilt using genuine OE core components and subjected to comprehensive testing to ensure 100% restoration of original equipment function, performance, and reliability. With LANDNOVO, you receive a component that performs identically to a brand-new OE unit, backed by a 12-month warranty — all at a fraction of the dealership cost.
4. Key Technical Specifications of LR035471
| Parameter | Specification |
|---|---|
| Part Number | LR035471 |
| Product Name | Active Anti‑Roll Control Pump / Pump‑Stability Programme |
| Condition | Factory Remanufactured – 100% OE Function Restored |
| Weight | 4.065 kg |
| Dimensions (L × W × H) | 18.0 × 16.0 × 16.0 cm |
| Applicable Models | Range Rover (L405) 2012–2021; Range Rover Sport (L494) 2013–2022 |
| Production Start VIN | From VLA000001 onward |
| Quantity per Vehicle | 1 unit |
Compatible engine families:
- 5.0L V8 Petrol (AJ133 – naturally aspirated and supercharged)
5. Common Failure Modes of the LR035471 Pump
Based on field experience, failures of the LR035471 pump and its associated system typically arise from the following issues:
5.1 Hydraulic Fluid Leakage (Most Frequent)
Leakage is the single most common fault in the ACE system. The high‑pressure lines are double‑layer metal tubes formed by a crimping (rolling) process, and the metal joint areas are the weakest points, highly susceptible to fluid seepage.
Risks associated with leakage:
- Fluid loss leads to system pressure drop, triggering dashboard warning lights.
- Prolonged leakage will directly damage the LR035471 pump due to oil starvation.
- In cold climates, thermal expansion and contraction increase the risk of leaks at connector joints.
5.2 Pump Mechanical Failure
When the hydraulic system develops a leak that is not promptly repaired, the LR035471 pump may continue running with insufficient fluid, leading to premature wear or seizure.
5.3 Seal Deterioration
The rubber O‑rings used in the system naturally harden and age over time, losing their sealing effectiveness and becoming potential leak sources. The associated service kit is part number LR052795 (O‑ring set).
6. Typical Symptoms of LR035471 Pump Failure
Drivers may observe the following signs when the LR035471 pump or the ACE system malfunctions:
- Excessive body roll – the vehicle leans noticeably more than usual during cornering.
- Reduced handling precision – the steering feels less responsive and the vehicle seems less stable.
- Steering wheel or body vibration – abnormal vibrations felt through the steering wheel or chassis, especially at speed.
- Dashboard warning light – the system illuminates a stability‑control or suspension warning.
- Vehicle lurches or sways during turns – this may indicate a problem beyond leakage, possibly involving the stabiliser itself.
- OBD fault codes – the system logs error codes related to active stability control.
7. Maintenance and Repair Recommendations
For workshops and technicians servicing the LR035471 pump and the ACE system, the following practices are essential:
7.1 Before Replacing the Pump – Inspect and Repair Leaks First
Never replace the pump without first locating and repairing any hydraulic leaks. The primary cause of pump failure is oil starvation due to system leaks. Installing a new or remanufactured pump without addressing these leaks will result in repeat failure.
7.2 Recommended Replacement Parts
When replacing the LR035471 pump, it is strongly advised to also inspect and, if necessary, replace:
- The high‑pressure hydraulic lines (part number LR124862) – these are prone to joint wear.
- The O‑ring seal kit (part number LR052795) – to restore system sealing integrity.
7.3 System Bleeding and Fluid Renewal
After replacing any component in the ACE hydraulic circuit, the system must be properly bled (purged of air) and refilled with fresh, approved hydraulic fluid. Failure to do so can lead to noise, poor response, and premature pump wear.
7.4 Regular Inspection Schedule
Periodic visual inspection of the ACE hydraulic lines – particularly the crimped metal joints – is the most effective way to detect early seepage and prevent pump damage.
7.5 Core Deposit (Surcharge) Note
LR035471 is a genuine Land Rover part and typically carries a core surcharge. When purchasing a new or remanufactured unit, an additional deposit is charged, which is refunded upon return of the old unit.
8. Why Choose LANDNOVO for LR035471?
LANDNOVO offers a superior alternative to both brand-new dealership units and lower-quality aftermarket alternatives. Every LANDNOVO LR035471 pump is:
- Factory remanufactured using genuine OE core components
- 100% restored to original equipment function, performance, and reliability
- Rigorously tested to OE standards
- Supplied with a 12-month warranty for complete peace of mind
- Delivered at a fraction of the cost of a new dealership unit
When you choose LANDNOVO, you are choosing a component that performs identically to a brand-new OE unit — without the brand-new price tag.
9. Conclusion
The LR035471 Active Anti‑Roll Control Pump is the vital hydraulic heart of the ACE system in the Land Rover Range Rover (L405) and Range Rover Sport (L494). Its root cause of failure is almost always a pre‑existing hydraulic leak that leads to system pressure loss and subsequent pump damage.
For repair facilities and technicians, a thorough understanding of the LR035471's technical parameters, system architecture, and common fault patterns is key to accurate diagnostics and long‑lasting repairs. Addressing all leaks before replacing the pump is the fundamental rule for ensuring system reliability and avoiding costly comebacks.
LANDNOVO LR035471 delivers the performance of a brand-new OE unit — factory remanufactured and 100% restored to original function — at a cost-effective price, backed by a 12-month warranty.
LANDNOVO — Designed by GB. Precision | Guaranteed | Durability.