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What 8 owners told NHTSA about the 2016 Jaguar Xj (swb)

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (8)Crash / fire / injury (3)Airbags (1)Electrical system (1)Electronic Stability Control (esc) (1)Engine (1)Engine & cooling (1)Wheels (1)

1 of 8 complaints match · Engine · clear filters

Jan 26, 2026Engine

In 2019, I purchased a Jaguar Land Rover vehicle. Over the past four to five years, the Y-pipe for the coolant system has repeatedly cracked and broken after being replaced by the Jaguar dealership. This is a significant safety concern that leads to coolant leakage, triggering a warning light and causing panic to remove the vehicle from the road to prevent overheating, head gasket failure, or potential fire. The Y-pipe is not available upon request, and I was informed that it is made of plastic. Because it goes from hot to cold, it will always be a recurring problem as long as it is manufactured as a plastic component. Another year passed, and the problem reoccurred. The dealership informed me that they are now replacing the Y-pipe with a metal version, but only for the current third iteration. With many YouTube videos and Google searches online from hundreds of people with the same problem, I am shocked that a recall has not been issued yet. This part is clearly defective and should be added to the recall list immediately.

NHTSA ODI 11713369

Working with the data? Download all 8 complaints as CSV · fetched from NHTSA July 24, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2016 Jaguar Xj (swb) verdict →