Ive just taken my Nov 2015 L405 into LR MD to have this looked at. They told me anything before 2016 is an automatic swap for new. 2016 onwards, they inspect and change if necessary.

Just an update, the car will be taken to Duckworths for inspection and part replaced and the other side done i hope, also profile updated thanks.

Someone asked if this is an issue on late L405s. I found a picture of what seems to be a cracked knuckle on a my21 D350 Autobiography for sale in Italy. It looks similar to the crack on Christian and Veras car.

Pics in my gallery

Duckworths replaced both sides, service manager great to deal with.

Hey everyone — just wanted to add my experience here.

I’ve discovered the same issue on my 2015 L494. I know this is an L405 forum, so sorry if this is off-topic, but both models seem to use the same part.

My driver’s side knuckle is nearly split in half, and there’s a small crack forming on the passenger side. This is a major safety issue. I recently bought the truck from a family friend, drove it 200 miles home, and now I keep thinking about what could’ve happened if the knuckle had failed at 70 mph.

The truck has a full dealership service history with every service done since new. It’s only got 50k miles, has been garage-kept, and is in mint condition. If there was ever a case for this being a manufacturing defect and not abuse or neglect, this is it.

I reached out to my dealership, who recommended contacting JLR Customer Care. The rep was helpful and suggested two things:

File a report with NHTSA (U.S.)

Have the truck flatbedded to the dealership for an official diagnosis. JLR will review the diagnosis to potentially cover the repair.

Click image to enlarge

Click image to enlarge

Nice of JLR to spread these problems around the range!

Chris

Just out of interest, thought I would take a picture this morning at the revised design on my L460

The split has gone! Also all curves, so no sharp-edged stress-raisers, what an admission of guilt!? 🤔?

I wonder if an L460 knuckle would fit an L405?  V6 Vogue - “Less is More” - less to go wrong!

As, the post a couple up… my neighbors L494 knuckle split in 2022. It’s a 2015 model. He went through insurance to fix as it then wrecked loads of other bits underneath as he was driving it at the time.

Click image to enlarge

I had very small hairline fractures in one of my front knuckles. My car is outside of the recall range but LR MD got both sides replaced under extended warranty without issue.

In today for a set of front ARC pipes. Owner was unaware of any issues, or the outstanding recall. 15MY, so both sides to be replaced under warranty

Click image to enlarge

Further to my earlier post today, it was Mike at MMP who managed to identify the cracks in my steering knuckles/ hub carrier. Only very careful inspection of the rear edge after a wire brush. Thanks MMP for potentially saving a catastrophic failure.

Mikey, do JLR provide an improved replacement part or is it identical, and therefore going to break again?

Mikey wrote:

In today for a set of front ARC pipes. Owner was unaware of any issues, or the outstanding recall. 15MY, so both sides to be replaced under warranty


No, I didn't road test it
Its coming back once the knuckles have been done

A threaded suspension ball joint with a nut on the end to hold it in place. Forgive me for stating the obvious but does anyone know why the 405 designers decided to try something new?

DrF wrote:

Just out of interest, thought I would take a picture this morning at the revised design on my L460