Uploaded November 2016 | Updated September 2026, 2 weeks ago
Link to purchase product: x8r.co.uk/exhaust-flange-muffler-back-box-repair-kit-for-bmw-e46-m3.html?utm_source=youtube&utm_medium=social&utm_campaign=analytics
The Problem
The OEM cast iron flanges rust / corrode and eventually split causing exhaust leaks.
A common fault on E46 M3 models is failure of the exhaust flanges caused by rust / corrosion of this part. Four flanges are used to clamp together and seal the intermediate pipe to the rear muffler / backbox. These are constructed of cast iron (despite being fitted to a stainless steel exhaust) and inevitably deteriorate and split. These parts are integral to the intermediate pipe and rear muffler and are not available separately from BMW. The only option until now has been to buy a new centre section from BMW at vast expense. Or to buy new flanges, cut them up, fit and re-weld them- a tricky job. None of these are an ideal solution to this common fault.
Symptoms of the fault
Upon inspection you will be able to see the flanges are rusted and corroded and often split or starting to.
It is common for this seal to fail causing the exhaust to blow which can cause MOT failure or advisory’s.
On occasions the exhaust may need removing for upgrade or perhaps for access to carry out sub frame repair, at which point the original flanges will need to be grinded to be removed and a suitable replacement will be required.
Vehicles affected and compatibility
BMW 3 Series E46 M3 07/1999 — 08/2006. All models: Convertible, Coupe, CSL.
Associated part numbers:
07119904533
18111719417
11621741172
18101405737
18111723379
18107832313
18107831783
Our solution
Install our high quality stainless steel flange clamps which very simply attach in situ, curing vehicle faults and will last the life of the vehicle.
Our kit is the superior solution to this problem. Our high quality stainless steel flange kit splits around the exhaust pipes, allowing you to replace the flanges without having to remove the exhaust. Simply grind off the old flanges (often they will just fall apart) slot our new flanges in to place and fasten. Our clamps are designed to be very simple to fit with no grinding usually required, a straight fit unlike many others on the market. No welding required, our flanges are designed for the life of the vehicle and can be removed in future and reinstalled with no hassle. Our kit comes complete with all you require including both types of gasket seal ring and the correct spec stainless steel bolts, washers, lock rings and nuts.
You will receive
4x Stainless steel flange kits enough to repair both pipe flanges
4x Stainless steel bolts, nuts, washers and locking washers.
1x Gasket ring equivalent to 18111723379
1x Gasket ring equivalent to 18101405737
Link to purchase product: x8r.co.uk/exhaust-flange-muffler-back-box-repair-kit-for-bmw-e46-m3.html?utm_source=youtube&utm_medium=social&utm_campaign=analytics
The Problem
The OEM cast iron flanges rust / corrode and eventually split causing exhaust leaks.
A common fault on E46 M3 models is failure of the exhaust flanges caused by rust / corrosion of this part. Four flanges are used to clamp together and seal the intermediate pipe to the rear muffler / backbox. These are constructed of cast iron (despite being fitted to a stainless steel exhaust) and inevitably deteriorate and split. These parts are integral to the intermediate pipe and rear muffler and are not available separately from BMW. The only option until now has been to buy a new centre section from BMW at vast expense. Or to buy new flanges, cut them up, fit and re-weld them- a tricky job. None of these are an ideal solution to this common fault.
Symptoms of the fault
Upon inspection you will be able to see the flanges are rusted and corroded and often split or starting to.
It is common for this seal to fail causing the exhaust to blow which can cause MOT failure or advisory’s.
On occasions the exhaust may need removing for upgrade or perhaps for access to carry out sub frame repair, at which point the original flanges will need to be grinded to be removed and a suitable replacement will be required.
Vehicles affected and compatibility
BMW 3 Series E46 M3 07/1999 — 08/2006. All models: Convertible, Coupe, CSL.
Associated part numbers:
07119904533
18111719417
11621741172
18101405737
18111723379
18107832313
18107831783
Our solution
Install our high quality stainless steel flange clamps which very simply attach in situ, curing vehicle faults and will last the life of the vehicle.
Our kit is the superior solution to this problem. Our high quality stainless steel flange kit splits around the exhaust pipes, allowing you to replace the flanges without having to remove the exhaust. Simply grind off the old flanges (often they will just fall apart) slot our new flanges in to place and fasten. Our clamps are designed to be very simple to fit with no grinding usually required, a straight fit unlike many others on the market. No welding required, our flanges are designed for the life of the vehicle and can be removed in future and reinstalled with no hassle. Our kit comes complete with all you require including both types of gasket seal ring and the correct spec stainless steel bolts, washers, lock rings and nuts.
You will receive
4x Stainless steel flange kits enough to repair both pipe flanges
4x Stainless steel bolts, nuts, washers and locking washers.
1x Gasket ring equivalent to 18111723379
1x Gasket ring equivalent to 18101405737
