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Ford Sierra RS Cosworth (1985 - 1992)

Last updated 25 November 2014


Buying Guide


  • Check for rust in the rear arches, door bottoms and bootlid.
  • Rust can attack the rear chassis rails.
  • Floorpan, sills, bulkhead and inner wings can all harbour corrosion.
  • Check panel gaps closely and look for signs of accident damage.

Engine and gearbox

  • If it’s misfiring, look for warn sensors and ageing ignition components.
  • Collapsed boost pipes can lead to erratic overboosting and kill the turbo.
  • If it’s overfuelling this will wash the oil off the boars and quicken engine wear.
  • Head gaskets tend to blow on the back of the block.
  • Check for white sludge on the oil filler cap to see if oil and water have mixed.
  • Gearboxes are strong but not unbreakable – listen for a rumbling noise.
  • Notchy change between third and fourth means the syncromesh is worn.

Running gear

  • Warped discs and sticky callipers are the most common faults.
  • Check for juddering and see if the car pulls to one side under braking.
  • A crashy, wallowy ride means the springs and dampers are shot.

Electrics and interior

  • Both leather and cloth Recaro seat bolsters wear.
  • Replacement Recaros in good condition are hard to find.
  • Dashboards are prone to cracking and are hard to repair.
  • Eletrical faults are often caused by worn wiring.
  • Make sure all the switches work.


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