Due to the well-known price pressure, shock absorber suspension springs for original equipment are increasingly being produced at the lower threshold of the target values. This saves as much as possible on material quality and coating. It is also not uncommon for springs to be undersized.
When I think of vehicles from the 80s and 90s that we worked on, it was unimaginable that cars with broken springs had to be repaired. On the contrary, with us the springs came under the press and the car was lowered by approx. 30 mm (please do not copy it - it is forbidden). Yes, yes, the springs from the old school could still take a beating...
E.g. Potholes, temperature fluctuations (summer/winter), rust on the surface cause premature aging, which can then also lead to the suspension spring breaking. Unfortunately, the wear of a spring is just as gradual as with a shock absorber and you don't immediately notice that there is something inconsistent in the chassis area. Even a broken spring often goes unnoticed. Since this usually breaks in the lower end area, the broken section is fixed in the spring plate. If you are lucky (unlucky), you will hear a noise in certain situations, which indicates that something is wrong. But unfortunately you can not rely on it.
Occasionally look under the vehicle and carry out a visual inspection, also paying attention to oily shock absorbers