Valeo 734894 - Radiator

Product Overview

The Valeo 734894 is a replacement radiator engineered for BMW X5 models from 2000 to 2006. This radiator fits the E53 generation X5 with 4.4L and 4.8L V8 engines, serving as a direct replacement for the OE unit (17101439101). Valeo is a trusted supplier of thermal management components for European vehicles, and this radiator maintains factory cooling performance and durability standards for your X5's engine and transmission cooling system.

This radiator is sold individually. Verify fitment for your specific year and engine displacement using the vehicle selector tool above.

Symptoms of a Failing Radiator

• Engine running hotter than normal; temperature gauge climbing into the red zone
• Visible coolant leaks beneath the vehicle, especially after parking
• Sweet-smelling coolant odor inside or around the engine bay
• Overheating during city driving or at idle, particularly in warm weather
• Loss of coolant level requiring frequent top-ups between services
• Discolored or rusty coolant visible through the overflow tank

Cross Reference Numbers

This Valeo 734894 is equivalent to or replaces the following part numbers: BM3010121, CU2593.

Vehicle Compatibility

This part fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• BMW X5 4.4i V8 Gas (E53): 2000–2003
• BMW X5 4.6is V8 Gas (E53): 2002–2003
• BMW X5 4.4i V8 Gas (E53): 2004–2006
• BMW X5 4.8is V8 Gas (E53): 2004–2006

This may also fit other applications. Please use the vehicle selector tool to verify fitment.

Often Replaced Together

For a complete cooling system service, many owners replace the following at the same time:

• Coolant hoses and clamps (upper and lower radiator hoses)
• Thermostat and housing
• Cooling fan or fan clutch
• Engine coolant (full flush recommended after radiator replacement)

Why Shop at eEuroparts.com?

• Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
• Fitment Confidence: Our accurate cataloging ensures you get the right part the first time, backed by our fitment guarantee.
• Fast, Reliable Shipping: Most in-stock orders ship the same or next business day from our U.S.-based warehouse.
• Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
• Exclusive Kits That Fit™: Complete repair solutions with no guesswork.
• Established Trust: Serving the European car community since 2000.

Frequently Asked Questions

How do I know if my BMW X5 E53 radiator is failing?

Common warning signs include engine overheating (temperature gauge in the red), visible coolant leaks under the vehicle, a sweet smell in the engine bay, or frequent coolant level drops. If your X5 is overheating during normal driving or idling, the radiator is often the culprit. Modern BMW X5 models are prone to radiator corrosion and internal blockages after 100,000 miles or more.

What is the difference between the 4.4i and 4.8is models, and does it affect radiator fitment?

The 4.4i X5 uses a 4.4L V8, while the 4.8is uses a larger 4.8L V8 with higher output. Both engines use the same radiator core design in the E53 generation, so the Valeo 734894 fits both displacements. However, always confirm your exact model year and engine size using the vehicle selector tool before ordering.

Do I need to replace the coolant when I install a new radiator?

Yes, a complete coolant flush and refill is highly recommended after radiator replacement. Old coolant may contain rust particles or sediment from the failed radiator, and fresh coolant ensures optimal cooling performance and protects your engine block and heater core. Consult your owner's manual for the correct coolant type and capacity.

What tools and how long does radiator replacement typically take?

Radiator replacement on an E53 X5 requires basic hand tools (wrenches, sockets, screwdrivers), a drain pan for coolant, and a jack with jack stands for safe vehicle support. Most DIY technicians complete the job in 1 to 2 hours, depending on engine bay familiarity and access. A torque wrench is helpful for reassembling any bolted connections to factory specification.

Is the Valeo 734894 an OEM-equivalent radiator?

Yes, Valeo is an OEM-level supplier for BMW thermal components. The 734894 is designed to meet or exceed the cooling capacity and durability of the original BMW radiator (part 17101439101). It carries the same core design and mounting points, making it a direct bolt-in replacement with no modifications needed.

Should I replace the radiator hoses and thermostat at the same time?

While not mandatory, replacing the upper and lower radiator hoses and the thermostat during radiator service is a smart preventive measure. These components age together, and hoses can fail shortly after a radiator replacement if they are already weakened. A thermostat replacement eliminates the risk of a stuck-closed unit causing overheating after your new radiator is installed.

Order the Valeo 734894 radiator today to restore cooling system performance in your BMW X5 E53. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your X5.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.