KYB coil spring

Why coil springs don’t last as long as they used to

KYB explains why there is more coil spring failure than ever in recent years, and explores the signs of a worn suspension.

With coil springs being an integral part of the vehicle’s suspension, it’s undeniable that they’re regularly put through their paces. Even the highest quality part is going to wear out eventually, but why are these components breaking more frequently in recent years?

It’s a road issue

KYB asserts that it’s mainly due to the state of British roads. Damage on the roads has increased dramatically, leading the AA to declare the pothole situation a “national emergency” last year.

It’s not only the road bumps that you have to worry about – speed humps also have an adverse effect on suspension parts, especially as 20% drivers admit to not slowing down for them. Councils paid out over £35,000 in compensation for damages caused by speedbumps from 2015 to 2017 with a third of those being suspension problems.

Furthermore, the cold weather and increased use of corrosive salt on roads doesn’t help. The constant barrage of salt and dirt on the suspensions will corrode the protective lacquer, exposing the bare steel which quickly rusts. In addition, the extreme temperature fluctuations further accelerates corrosion, leading to spring failure over time.

Change in design

Vehicle manufacturers have gradually reduced the size and weight of coil springs in an aim to increase efficiency. This means the springs are expected to perform under more stress. As a result, it is important to ensure that replacement springs are robustly engineered with high-quality materials to avoid premature spring failure.

As the UK market leader, KYB guarantees the same high-quality precision engineering demanded by the world’s vehicle manufacturers, including BMW, Audi, Nissan and Toyota. Their quality is evidenced by the warranty rate under 0.2% – proving that workshops can fit and forget with KYB. KYB offers two types of miniblock spring; the RJ which matches the OE design, and the RX which offers an alternative to the OE taper wire design.

Signs to look out for

KYB advises motorists to keep an eye out for the following signs of a damaged suspension:

  • Harsh ride
  • Nosedive when braking
  • Uneven tyre wear
  • Veering in side winds
  • Excessive bouncing over bumps
  • Excessive body roll when cornering

While the motorist may be tempted to request only the broken side be repaired, it’s important that parts are replaced in pairs to ensure the wear is equivalent.

FPS stocks an extensive range of KYB springs and shocks, covering 98% of the KYB pareto. These are available for same/ next-day delivery via the F:Drive, or speak to your local FPS representative for more information.


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