LR039251

LR039251 is the genuine Land Rover OE number for the radiator bottom hose (also known as radiator lower hose) used on Land Rover vehicles equipped with the 3.0-liter TDV6 diesel engine. This flexible rubber hose connects the bottom of the radiator to the engine block near the water pump, enabling the continuous circulation of coolant between the engine and the radiator. The coolant carries excess heat away from the engine to the radiator, where it is cooled before returning to the engine block, preventing overheating and ensuring the engine operates at optimal temperature.

As a critical component of the engine cooling system, failure of the radiator bottom hose can lead to coolant leaks, loss of system pressure, engine overheating, and potentially severe engine damage including blown head gaskets and cracked cylinder heads. Timely replacement with a high-quality OE-equivalent part is essential for maintaining vehicle reliability and avoiding costly repairs.

For B2B buyers – including auto parts wholesalers, 4S dealership groups, independent Land Rover repair shops, and overseas parallel traders – sourcing LR039251 from a reliable factory partner directly translates to better pricing, consistent quality, and stable inventory availability.

Key Specifications

Vehicle Fitment – Comprehensive Compatibility Table

LR039251 is compatible with the following Land Rover models powered by the 3.0 TDV6 diesel engine:

Scuderia Car Parts confirms compatibility with Discovery 4 (2010-2016), Range Rover Sport (2010-2014), Range Rover (2013-present), Discovery 5 (2017-present), and Range Rover Velar (2017-present). LR Parts additionally lists compatibility with Range Rover L405 and Range Rover Sport L494 models running the 3.0 TDV6 engine.

Engine power variants confirmed compatible:

256 hp version: 3.0 TDV6 diesel, from August 2012 onward

258 hp version: 3.0 TDV6 diesel, April 2013 – March 2022

292 hp version: 3.0 TDV6 diesel, April 2013 – December 2016

All three power variants utilize the same cooling system configuration and are compatible with LR039251.

Material & Quality – Factory Standards

LR039251-equivalent hoses supplied by Guangzhou Sanjin Auto Parts are manufactured using high-grade EPDM rubber compounded with fabric reinforcement layers, engineered to withstand the demanding operating conditions of turbocharged diesel engines.

Key performance characteristics:

Temperature range: -40°C to +135°C (peak tolerance up to +150°C)

Pressure rating: Engineered for cooling system operating pressures of 0.3–0.5 MPa (3–5 bar)

Chemical resistance: Resistant to ethylene-glycol based coolants, engine oil, ozone degradation, and weathering

Construction: Multi-layer reinforced construction with precision-molded ends for leak-free fitment

As a factory-direct manufacturer, Guangzhou Sanjin Auto Parts Co., Ltd. controls quality from drawing to raw material procurement, through sampling, equipment testing, environmental testing, internal packaging, and external packaging – implementing 360-degree quality control throughout the production process. The company specializes in automotive piping parts including coolant hoses, fuel pipes, turbocharger pipes, gearbox pipes, and steering oil pipes.

Factory Strength – Why Source LR039251 from Guangzhou Sanjin Auto Parts

1. 20+ Years of R&D and Manufacturing Experience

Guangzhou Sanjin Auto Parts Co., Ltd. has been operating for 22 years in the automotive piping components industry, integrating research & development, production, and sales into one streamlined operation. This long-standing expertise translates directly into product consistency and manufacturing reliability that B2B buyers can depend on.

2. Extensive Product Portfolio – 1000+ SKU Available

The company has accumulated over 1,000 SKU products, covering virtually all common automotive piping needs – from coolant hoses and fuel lines to turbocharger pipes, gearbox pipes, steering oil pipes, and oil dipsticks. For B2B buyers consolidating sourcing needs, this breadth of offering reduces the number of suppliers needed and simplifies procurement logistics.

3. OEM/ODM Capabilities with Fast Turnaround

The company offers complete OEM/ODM services for automotive piping components. For a series of similar parts, the R&D cycle can be completed and delivery achieved within 15 days. This rapid development capability is critical for buyers requiring custom specifications or just-in-time inventory management.

4. 1:1 Replica Quality with 30%+ Price Advantage

For LR039251 and other Land Rover cooling system components, Guangzhou Sanjin offers 1:1 replica quality exactly matching original manufacturer specifications at prices more than 30% lower than original manufacturer products – all while maintaining identical quality standards. This price advantage goes directly to the B2B buyer's profit margin.

5. Global Export Track Record – 60+ Countries Served

Guangzhou Sanjin exports to more than 60 countries across the Americas, Europe, Southeast Asia, and beyond. The company has established partnerships with 3,298 automobile cooperative service providers and 266 overseas retail cooperative service providers. This extensive global footprint demonstrates proven logistics capabilities and regulatory compliance for international shipping.

6. 2-Year Factory Warranty

Every product is backed by a 2-year warranty, providing B2B buyers and their end customers with confidence in product durability and performance.

7. Integrated Logistics – Sea and Air Freight Partnerships

Guangzhou Sanjin maintains exclusive sea and air transportation strategic partners, offering full-service support for customs declaration, transportation, and customs clearance – streamlining the entire import process for overseas buyers.

8. Source Factory – No Middleman Markup

As a direct manufacturing source rather than a trading company or distributor, Guangzhou Sanjin eliminates intermediary markups. B2B buyers work directly with the factory – from drawings to finished product, with customized packaging options available.

9. 24/7 Order Processing

The sales team is available 24 hours a day, 365 days a year to take orders and respond to inquiries, ensuring minimal delays in the procurement process.

10. Certifications and Quality Assurance

Quality control is implemented throughout the 360-degree testing and inspection process – from incoming raw materials to equipment testing, environmental testing, internal packaging, and external packaging. The company specializes in supplying piping components for Mercedes-Benz, BMW, Peugeot, Citroen, and BMW Mini, demonstrating its capability to meet premium European OEM standards.

Cooling System Function – Technical Background

The LR039251 radiator bottom hose serves as the return path in the engine cooling system. The cooling cycle operates as follows:

Heat absorption: Coolant circulates through the engine block and cylinder heads, absorbing combustion heat

Heat transfer: Heated coolant flows to the top of the radiator via the radiator top hose

Heat dissipation: As coolant travels downward through the radiator core, heat is transferred to ambient air

Return flow: Cooled coolant exits the radiator bottom and returns to the engine block via the LR039251 radiator bottom hose, near the water pump

Continuous cycle: The water pump maintains constant circulation throughout the system

The radiator bottom hose is positioned at the lowest point of the radiator and connects to the engine block near the water pump, making it a critical junction in the cooling system's pressure-maintaining loop.

Why the Cooling System Requires Premium-Grade Hoses

Land Rover's 3.0 TDV6 diesel engine operates at higher temperatures and thermal loads compared to naturally aspirated gasoline engines, due to turbocharging and higher compression ratios. This puts greater stress on cooling system components including radiator hoses.

If an LR039251 radiator bottom hose begins to fail – whether from age-related hardening, surface cracking, internal delamination, or connection point loosening – several consequences follow:

Coolant leaks develop, visible as green, pink, or white crystallized residue around hose connections

Cooling system pressure drops, reducing the boiling point of the coolant and leading to localized overheating (nucleate boiling)

Engine temperature fluctuates erratically or consistently runs hot

Overheating can escalate rapidly, potentially causing head gasket failure, cylinder head warping, or cracked engine block

For B2B buyers supplying to Land Rover repair shops and fleet maintenance operations, recommending proactive replacement of LR039251 and related cooling system hoses during scheduled service intervals is both a value-add service and a risk-reduction strategy for customers.

Recommended Replacement Schedule

LR Parts notes that customers who purchased LR039251 frequently also browsed LR053285 – Intercooler Right Hand Hose for Range Rover L405 and Range Rover Sport L494 (3.0 TDV6), suggesting these components are commonly replaced together as a cooling system service package. For B2B buyers, this presents a cross-selling opportunity – bundling LR039251 with LR053285 and related cooling system components for higher average order value.

Failure Signs – When to Replace LR039251

For B2B customers advising their end clients (repair shops and fleet managers), here are the key indicators that an LR039251 radiator bottom hose requires replacement:

B2B Sourcing Information – Factory Direct Supply

Contact Factory Directly

Guangzhou Sanjin Auto Parts Co., Ltd.

📞 Phone: +8618665077950

✉️ Email: yinxingguo@steeringoilpipe.com

🌐 Website: www.steeringoilpipe.com

🏭 Inquiry Form: Available on the Request a Quote page

Bulk Order Advantages for B2B Buyers

Tiered wholesale pricing available based on order quantity

Factory direct pricing – no intermediary markups

Stable supply from direct factory production

Custom packaging options for retail distribution

Just-in-time inventory support with fast turnaround

Sample orders available for quality verification before bulk commitment

Target Customer Segments

Auto parts wholesalers and distributors seeking reliable Land Rover cooling system inventory

4S dealership groups requiring OEM-equivalent quality at competitive pricing

Independent Land Rover specialist repair shops needing consistent parts availability

Overseas parallel traders sourcing Chinese aftermarket components for export markets

Fleet maintenance operators managing Land Rover vehicle fleets requiring scheduled cooling system service

Frequently Asked Questions (FAQ)

Q1: Is LR039251 compatible with all Land Rover 3.0 TDV6 diesel engines?

Yes, LR039251 is specifically designed for the 3.0 TDV6 diesel engine across multiple Land Rover models. Compatibility is confirmed for Range Rover L405 (2012-2021), Range Rover Sport L494 (2013-2022), Discovery 4 (2010-2016), Discovery 5 (2017-present), and Range Rover Velar (2017-present). All three power variants – 256 hp, 258 hp, and 292 hp – use the same cooling hose configuration. For B2B buyers, this broad cross-model compatibility simplifies inventory management – one part number serves multiple popular Land Rover models and engine variants.

Q2: What are the interchangeable OE numbers for LR039251, and how does Guangzhou Sanjin's factory-direct product compare to OE quality?

LR039251 also carries the OE equivalent numbers CPLA8286CA and KDI1389 – these numbers reference the same radiator bottom hose component and can be used interchangeably for parts lookup. Guangzhou Sanjin's factory-direct product offers 1:1 replica quality matching original manufacturer specifications at 30%+ lower pricing. The company controls the entire production process from drawing to finished product, with 360-degree quality testing including equipment testing, environmental testing, and packaging verification. For B2B buyers, this combination of OE-quality standards and factory-direct pricing translates directly to higher profit margins and satisfied end customers who receive components that fit and function identically to OE parts.

Q3: As a B2B buyer, what are the advantages of sourcing LR039251 directly from Guangzhou Sanjin rather than through a distributor?

Sourcing factory-direct from Guangzhou Sanjin offers six distinct B2B advantages: First, cost advantage – elimination of distributor markups with factory-direct pricing. Second, quality control – direct oversight of the manufacturing process from raw materials to finished product. Third, supply stability – production scheduling aligned directly with your demand rather than competing with other distributor customers. Fourth, fast custom development – 15-day R&D cycle for series of similar parts when OEM/ODM requirements arise. Fifth, 2-year factory warranty – backed by the manufacturer rather than a middleman. Sixth, global logistics support – established sea and air freight partnerships serving 60+ countries with customs clearance assistance. For auto parts wholesalers, 4S groups, and overseas traders, these advantages directly impact procurement costs, inventory reliability, and ultimately, customer satisfaction.

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