Used Ford Sierra Dual Mass Flywheel

No — the Ford Sierra (produced from 1982 to 1993) was not fitted with a dual mass flywheel on any of its variants. Dual mass flywheels became common in European cars from the mid-to-late 1990s onwards, and the Sierra's entire production run predates their widespread use; none of its petrol or diesel engine options used one. If your Sierra has a flywheel-related vibration or noise problem, you are almost certainly looking for a conventional solid flywheel, and a UK breaker specialising in classic Fords should be able to help you find the right one matched to your engine code.

This is almost certainly an error somewhere in the quoting process. The Ford Sierra never left the factory with a dual mass flywheel; every Sierra variant used a conventional single-mass solid flywheel throughout production from 1982 to 1993. It is possible the part was misidentified, or a search tool has returned results for a different Ford model — double-check that the quote is specifically for a solid flywheel matched to your Sierra's engine code, as that is what you actually need.

All Ford Sierras require a conventional solid single-mass flywheel, not a dual mass unit. The correct flywheel for your car depends primarily on the engine code — different engines across the Sierra's two main generations (Mk1 1982–1987 and Mk2 1987–1993) used different flywheels, and the gearbox type also matters. Your engine code, found on your V5C or via a VIN check, is the single most useful piece of information to give a breaker when sourcing the right flywheel.

There is no practical or advisable reason to attempt this, and no off-the-shelf dual mass flywheel from another Ford is designed or known to be compatible with a Sierra engine. The Sierra's engines were engineered around a solid flywheel, and the bellhousing, gearbox input shaft, and clutch assembly are all matched to that setup. If you need a replacement flywheel, a solid unit sourced from a Sierra with the same engine code is by far the correct route, and any UK Ford specialist breaker should be able to supply one.