NEED TO KNOW

COST: See parts & costs below TIME: Around 3 hours, much longer without a post lift or ramp

DIFFICULTY: MODELS: The basic principles of this job apply to most vehicles, though the feature specifically concerns Discovery 3 and Range Rover Sport 2.7 TDV6.

TOOLS: General workshop tools including 20, 18, 15 and 10 mm spanners and sockets, ramp or post lift, metal saw and a heat source possibly in the form of an oxy acetylene or gas torch kit.

PARTS & COSTS: Always use your Discovery’s VIN number, model year and engine to check for the correct part number. There are various part numbers for this section of exhaust pipe. WCD501630, Discovery 3 all 2.7 V6 diesel models with EC2 emissions from 7A000001 to 8A477928; Discovery 3 all 2.7 V6 diesel manual models with EC2 emissions from (VIN) 8A477929 on, around £1431; WCD502490, Discovery 3, all 2.7 V6 diesel automatic models with EC2 emissions from (VIN) 8A477929; around £650. Various used downpipe with catalyst sections of exhaust pipe available from Land Rover breaker yards and on internet auction sites. ESR3737, exhaust manifold gasket, from 50p £8.60 depending on make.

WORK SAFELY: See LRM Technical intro page. The job shown here is not suitable for DIY unless the necessary knowledge and equipment is available, but illustrates the work involved for your garage. We do not recommend working underneath without the use of a correctly rated and inspected vehicle lift.

CONTACT: Maddison 4x4, Water House Farm, Station Road, Topcliffe near Thirsk, YO7 3SG (maddison4x4. com / 01845 587407).