I recently encountered a significant problem with the timing chain of my vehicle (Land Rover Discovery 2015) , resulting in the need for repairs. I took my vehicle to a reputable local mechanical repair center for a diagnosis, and the diagnostic report revealed three codes directly associated with the timing chain issue. Throughout its lifespan, my vehicle has been properly serviced. After consulting with the chief mechanic at the repair centre and conducting my own research, it is evident that the timing chain should endure the entire life of the engine, at least surpassing the mileage covered by my vehicle (122,979 km (at the time of writing the complaint email to Land Rover).
The diagnostic report displays the following codes related to the timing chain problem:
- P0505-27: Idle Air Control System
- P0341-00: Camshaft Position Sensor A – Circuit Range/Performance (Bank 1 Or Single Sensor)
- P0316-00: Misfire Detected On Start-up (First 1000 Revolutions)
The remaining codes shown in the diagnostic report are either directly or indirectly linked to the timing chain problem. Given the prolonged duration of this issue, it is highly likely that it may impact other systems, such as the fuel system and CAN Bus communication.
Following legal advice, I have learned that I have the right to take action under section 271 of the Australian Consumer Law for breaches of consumer guarantees, despite having purchased the vehicle from a private seller.
I have contacted Land Rover but unit now they have not made any genuine efforts to resolve the matter.  
I am aware of a class action lawsuit regarding timing chain problems in LR4 and Sport models in the United States against Land Rover. Based on my understanding, the main engine specifications across the Land Rover model line are very similar, if not identical, suggesting that engines installed in various models should be treated equally, with minor or insignificant differences.
After a legal consultation, it was revealed that a class action can be initiated in Australia if multiple plaintiffs face the same/similar issue with their vehicles, provided that the defect is attributed to the manufacturer's responsibility. It does not matter whether the problem was fixed at an earlier stage; financial compensation from Land Rover can be sought to cover the repair costs. In my opinion, as a Land Rover owner experiencing the same/similar issues, it is important to stand up and fight for our rights.
If you are also facing timing chain issues with your Land Rover Discovery Sport model, please contact me by providing your details below or email to 
thomas.bayley100@gmail.com.
I look forward to hearing from you.