In 2025, Jaguar Land Rover made a groundbreaking release with the introduction of OEM aluminum cooling pipes LR186859 & LR186917 for supercharged 3.0L and 5.0L engines (AJ126 & AJ133). This quietly significant release marks a major upgrade after more than a decade of settling for unreliable plastic and aftermarket alternatives.
These new cooling pipes are not just any replacement—they’re factory-engineered aluminum coolant flanges, specifically designed to replace the failure-prone plastic pipes that have plagued mechanics and enthusiasts since JLR discontinued the originals in 2010. Crafted from high-quality, factory-engineered metal, these aluminum pipes are built to withstand extreme heat and pressure, offering a level of durability that far exceeds the plastic alternatives.
The reintroduction of these OEM aluminum pipes ensures that customers receive the same high-quality, long-lasting components originally used in the vehicle’s construction. These pipes significantly reduce the need for frequent replacements, lowering long-term maintenance costs for vehicle owners while improving overall engine performance. By providing better cooling and reducing the risk of system failures, they help maintain optimal engine temperature, ensuring your engine runs smoothly for years to come.
Take a look at this side-by-side comparison below: the differences between the aftermarket version and the OEM aluminum cooling pipes are clear. From durability to design, it's evident why the OEM pipes are the superior choice for your JLR vehicle.
From 2010 onward, JLR owners were forced to rely on aftermarket aluminum or worse—plastic cooling pipes. While some performed adequately, many suffered from:
💥 JLR’s new OEM cooling pipes are precision-machined from high-strength aluminum, with reinforced end connections, seamless welds, and a direct factory fit—eliminating cooling system weak points once and for all.
Supercharged engines generate extreme heat—and cooling system failure is one of the top reasons for premature engine wear and failure in JLR 3.0L and 5.0L models.
These 2025 OEM pipes are built to withstand:
That means lower risk of overheating, longer engine life, and fewer repairs down the line.
These aren’t rebranded aftermarket parts. They’re genuine JLR—straight from the source.
Early vehicles with the 5.0 and 3.0 supercharged engines had robust metal coolant pipes. Unfortunately Jaguar Land Rover changed the newer vehicles pipes to plastic. These are prone to early failure as the plastic can crack/split easily due to many heat cycles and pressure within the cooling system. This 2 piece kit reverts the problematic plastic pipes back to a robust metal set up complete with new seals. For JLR owners who’ve struggled with plastic coolant pipes or inconsistent aftermarket fitments, this release is more than just exciting—it’s essential.
Jaguar stopped using that small failure prone coolant line from the front of the engine back to the coolant reservoir. BUT they capped the front part of the port off on the Range Rover variants and did not change the casting and is useful for bleeding the system.
Cost Difference: But Here's the ROI:
This significant development addresses the persistent issues associated with the previously used plastic pipes, which were prone to failures, leading to engine overheating and costly repairs.These high-grade aluminum pipes offer enhanced durability and reliability. Choosing OEM means fewer future repairs, longer engine life, and greater peace of mind—especially in high-performance builds.
There is no reason to get the aftermarket pipes that may or may not have fitment issues down the road. It's an expensive car and more expensive to fix, no reason to skimp on something as important as the cooling system
The reintroduction of OEM metal cooling pipes by JLR marks a significant step towards enhancing vehicle reliability and customer satisfaction. Don't compromise on your vehicle's performance and longevity by settling for inferior aftermarket parts. Choose the trusted quality of OEM components.
Whether you're restoring, repairing, or upgrading your Range Rover, Defender, or Jaguar XF, the 2025 OEM aluminum cooling pipes deliver unmatched reliability, factory-perfect fitment, and real peace of mind.
You won't find these on just any parts site. As of today, most major retailers still have LR186859 & LR186917 on backorder or haven’t even listed them.
🔒 These pipes are currently on backorder from most suppliers—but Rover Parts Depo has them in stock and ready to ship.
That means you can be first to protect your engine with the cooling upgrade JLR never should’ve taken away.
At Rover Parts Depo, we offer competitive pricing on all our high-quality parts, backed by a reputation for excellence. When you shop with us, you can expect genuine parts, fast shipping, and outstanding customer service. Rest easy knowing you're receiving the best value and reliability available.
Order Now from Rover Parts Depo - before they're gone again.
For fitment verification or any questions, please call or text your VIN# to 888-575-6707. Our team is here to help and ensure you get the right parts with ease. Shop with confidence, knowing we’ve got your back!
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