Axle springer

My 2002 BMW 320d (85,000 miles) has just been diagnosed as having two broken rear coil springs. I vaguely remember reading something in your Saturday Telegraph column about this problem and the fact that it happens because the springs are manufactured with unfinished ends. Is this correct or have I got the wrong information?

Asked on 28 February 2009 by

Answered by Honest John
Yours are the second broken springs today. The first were on a Citroen C3. It's due to corrosion at the bottom because the springs are not made to resist this. Same applies to all European made coil springs in virtually all makes and models of European cars. To resist corrosion at the ends, springs need to be 'pigtailed', if they don't go round a strut, or tapered or flattened if they do. The cups that hold the springs at the bottoms of struts usually harbour salty road dirt. They are usually finished off by speed humps.
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