Broken front n/s coil spring on 4year old Jimny

On the way to its second MoT I heard a clang from underneath but nothing untoward happened so I carried on to the garage where the test revealed a broken coil spring. Replaced both coil springs on the advice of the garage.

This vehicle had not been off road and is relatively low mileage and as far as I recall has never hit a really bad pothole so why did the spring break?

The garage seemed to think that broken coil springs are not uncommon. I would have thought that coil springs are pretty robust and would only break if subjected to very harsh treatment or if the steel had a manufacturing flaw. Anyone have a view on why my spring should have broken?

Mike

Not got any views on the Jimny coil springs, mine is a 2009 and still on originals, but it does appear to be a modern car "thing" along with ignition coil packs. In the good old days your single coil and springs lasted the life of the vehicle. That said old cars rusted through in a few years, so thats no recommendation :laugh:
Vauxhall Corsa D's eat rear and front coil springs, common issue, also coil packs. They can fail in a few years, "monkey metal" from China could be the main issue.
No big deal, just change them.

Our old c class Mercedes chewed coils for fun, like said above its not uncommon and if the heat treatment is only slightly off a spring can be soft and sag or hard and snap, it's easy to get wrong.

Thanks for the responses. Looks like the garage were right then.

Mike

The state of the roads does not help. Springs for road cars are designed for flat roads not the pockmarked ones we have to use on a daily basis. Constant hammering, be they minor, adds up.

Resurrecting old thread - my 7 year old Jimny has just had its second OSF spring break. My daughter’s Jimny also had OSF spring break last year at 7 YO. Both cars low mileage and used daily around town and not seen off road. At this rate I’ll be best bulk buying springs for future consumption!
Buzz