What are some important facts to know about the catalytic converter on BMW 325i?

The performance of the catalytic converter is monitored by the oxygen sensors. When a change in readings occurs between the upstream and downstream sensors, a trouble code should be set that indicates the catalytic converter is not working efficiently. Take the vehicle to a dealer or other qualified shop for analysis. The catalytic converter is a reliable and simple device which needs no maintenance in itself, but there are some facts an owner should be aware of if the converter is to function properly for its full service life. Always keep the ignition and fuel systems well-maintained in accordance with the manufacturer's schedule. If the engine develops a misfire, do not drive the vehicle at all (or at least as little as possible) until the fault is corrected. DO NOT push- or tow-start the vehicle-this will soak the catalytic converter in unburned fuel, causing it to overheat when the engine does start. DO NOT switch oft the ignition at high engine speeds. DO NOT use fuel or engine oil additives-these may contain substances harmful to the catalytic converter. DO NOT continue to use the vehicle if the engine burns oil to the extent of leaving a visible trail of blue smoke. Remember that the catalytic converter operates at very high temperatures. DO NOT, therefore, park the vehicle in dry undergrowth, over long grass or piles of dead leaves after a long run. Remember that the catalytic converter is FRAGILE - do not strike it with tools during servicing work. In some cases a sulphurous smell (like that of rotten eggs) may be noticed from the exhaust. This is common to many catalytic converter-equipped cars and once the vehicle has covered a few thousand miles, the problem should disappear. The catalytic converter, used on a well-maintained and well-driven vehicle, should last for between 50,000 and 100,000 miles - if the converter is no longer effective, it must be replaced. The catalytic converter is integral with the exhaust manifold, and they are replaced as a unit.

Genuine BMW 325i Catalytic Converter

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12 Catalytic Converters found

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BMW 325i Exchange. Exhaust Manifold With Catalyst
Part Number: 18407545309
$1139.89 MSRP: $1437.05
You Save: $297.16 (21%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Exch. exhaust manifold with catalyst; Exhaust Manifold
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006 BMW 325i | Sedan(E90)
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BMW 325i Exchange. Exhaust Manifold With Catalyst
Part Number: 18407514502
$2618.69 MSRP: $3477.31
You Save: $858.62 (25%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Exch. exhaust manifold with catalyst; Exhaust Manifold, Manifold
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2005 BMW 325i | Sedan M54 Engine(E46), Sedan(E46), Wagon M54 Engine(E46), Wagon(E46)
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BMW 325i Catalytic Converter
Part Number: 18307544510
$1261.94 MSRP: $1596.74
You Save: $334.80 (21%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Exchange Exhaust Pipe Catalyst Cylinder; Converter & Pipe
- Position: Driver Side
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006 BMW 325i | Sedan(E90)
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BMW 325i Catalytic Converter
Part Number: 18301247143
$2432.69 MSRP: $2916.47
You Save: $483.78 (17%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exchange Exhaust Pipe Catalyst Cylinder; Converter & Pipe
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
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BMW 325i Exchange. Exhaust Manifold With Catalyst
Part Number: 18407515105
$944.37 MSRP: $1218.14
You Save: $273.77 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exch. exhaust manifold with catalyst; Exhaust Manifold, Manifold
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2003-2005 BMW 325i | Sedan M56 Engine(E46), Wagon M56 Engine(E46)
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BMW 325i Exchange. Exhaust Manifold With Catalyst
Part Number: 18407545308
$1043.44 MSRP: $1310.85
You Save: $267.41 (21%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exch. exhaust manifold with catalyst; Exhaust Manifold
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006 BMW 325i | Sedan(E90)
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BMW 325i Catalytic Converter
Part Number: 18307547840
$1261.94 MSRP: $1596.74
You Save: $334.80 (21%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exchange Exhaust Pipe Catalyst Cylinder; Converter & Pipe
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006 BMW 325i | Sedan(E90)
View related parts
BMW 325i Exchange. Exhaust Manifold With Catalyst
Part Number: 18407514503
$2185.37 MSRP: $2892.64
You Save: $707.27 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exch. exhaust manifold with catalyst; Exhaust Manifold, Manifold
- Replaces: 18-40-7-508-759
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2005 BMW 325i | Sedan M54 Engine(E46), Sedan(E46), Wagon M54 Engine(E46), Wagon(E46)
View related parts
BMW 325i Exchange. Exhaust Manifold With Catalyst
Part Number: 18407515104
$944.37 MSRP: $1218.14
You Save: $273.77 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exch. exhaust manifold with catalyst; Exhaust Manifold, Manifold
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2003-2005 BMW 325i | Sedan M56 Engine(E46), Wagon M56 Engine(E46)
View related parts
BMW 325i Catalytic Converter
Part Number: 18307515236
$1145.00 MSRP: $1488.86
You Save: $343.86 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exchange Exhaust Pipe Catalyst Cylinder; Front Muffler
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2003-2005 BMW 325i | Sedan M56 Engine(E46), Wagon M56 Engine(E46)
View related parts
BMW 325i Catalytic Converter
Part Number: 11761716743
Product Specifications
- Other Name: Exchange Exhaust Pipe Catalyst; Pipe
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
View related parts
BMW 325i Catalytic Converter
Part Number: 11761716744
$1698.32 MSRP: $2093.84
You Save: $395.52 (19%)
Product Specifications
- Other Name: Exchange Exhaust Pipe Catalyst Cylinder; Pipe
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)

BMW 325i Catalytic Converter

If you are looking for OEM BMW 325i Catalytic Converter, we highly recommend to shop with us. Not only do we offer the most budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW 325i Catalytic Converter that come backed by the manufacturer's warranty.

BMW 325i Catalytic Converter Parts Questions & Experts Answers

Exchange. Exhaust Manifold With Catalyst
18407545309
Q: What are some important facts to know about the catalytic converter on BMW 325i?
A: The performance of the catalytic converter is monitored by the Oxygen Sensors. When a change in readings occurs between the upstream and downstream sensors, a trouble code should be set that indicates the catalytic converter is not working efficiently. Take the vehicle to a dealer or other qualified shop for analysis. The catalytic converter is a reliable and simple device which needs no maintenance in itself, but there are some facts an owner should be aware of if the converter is to function properly for its full service life. Always keep the ignition and fuel systems well-maintained in accordance with the manufacturer's schedule. If the engine develops a misfire, do not drive the vehicle at all (or at least as little as possible) until the fault is corrected. DO NOT push- or tow-start the vehicle-this will soak the catalytic converter in unburned fuel, causing it to overheat when the engine does start. DO NOT switch oft the ignition at high engine speeds. DO NOT use fuel or engine oil additives-these may contain substances harmful to the catalytic converter. DO NOT continue to use the vehicle if the engine burns oil to the extent of leaving a visible trail of blue smoke. Remember that the catalytic converter operates at very high temperatures. DO NOT, therefore, park the vehicle in dry undergrowth, over long grass or piles of dead leaves after a long run. Remember that the catalytic converter is FRAGILE - do not strike it with tools during servicing work. In some cases a sulphurous smell (like that of rotten eggs) may be noticed from the exhaust. This is common to many catalytic converter-equipped cars and once the vehicle has covered a few thousand miles, the problem should disappear. The catalytic converter, used on a well-maintained and well-driven vehicle, should last for between 50,000 and 100,000 miles - if the converter is no longer effective, it must be replaced. The catalytic converter is integral with the exhaust manifold, and they are replaced as a unit.

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