Honda had issued a warranty extension for the following vehicles which includes the 7th Generation Accord Affected Honda cars are Chassis CodeModelYear ModelCN1Accord Saloon 7th Generation2004 to 2008CN2Accord Tourer 7th Generation2004 to 2008 The Symptom Abnormal noises from the engine compartment. You will also notice exhaust fumes entering the car cabin when the car is cold. You will also notice a less refined engine characteristics coupled with lower fuel efficiency. The Cause Crack in the exhaust manifold caused by incorrect welding. On removal of the affected manifold you may find hairline cracks or sooty residue around the welds. The fix Welding process changed to machine operation and weld thickness increased. This has cured majority of the manifold issue but members with tuned engine have found this modified part from Honda is designed for sustained high boost pressure. This is a warranty extension for all non-tuned i-CTDi engines with a warranty Extension. Honda dealers are now inspecting cars more rigorously to see if they are boosted so owners beware. Which is an extended from the standard 3 year plus 4 years = Total 7 years with a mileage limit of 125,000miles / 200,00km. Modified Part number : 06180-RBD-E01 TIP When buying a high mileage second hand diesel I-CTDI car make sure you listen and smell traces of unburnt diesel in the engine compartment. Ask if the car has had this warranty extension applied. If not negotiate the price accordingly if the mileage has exceeded 125k Miles.