How to remove the upper intake manifold and exhaust manifold on BMW 325i?

To remove the intake manifold on a 2.0L engine, start by disconnecting the negative battery cable. Then, remove the engine cover, strut tower crossbrace, and sound insulator. Disconnect the wiring harness clips and move the harness out of the way. Remove the PCM control unit, release the quick-connectors for the fuel tank vent valve, and disconnect the electrical connectors to the fuel tank vent valve and throttle valve. Remove the charge air cooler hose and the intake plenum mounting nuts. Install the new intake plenum gaskets and tighten the nuts in stages. For a 3.0L engine, remove the fuel injectors and air filter housing. Disconnect the wiring plugs from the throttle body/manifold and release the wiring harness/cables from the retaining clips/bolts. Disconnect the breather hose from the manifold and remove the manifold retaining bolts. Lift the manifold and disconnect the hose on the base of the tank venting valve. Disconnect any hoses or wiring harnesses from the retaining clips on the manifold and support bracket. Remove the manifold from the cylinder head and check the condition of the seals. Replace them if necessary. To remove the exhaust manifolds on a 3.0L engine, raise the front of the vehicle and remove the engine splash shield. Remove the nuts securing the manifold outlets to the exhaust system and disconnect the electrical connectors for the oxygen sensors. Remove the cover over the ignition coils and the coolant expansion tank. Remove the rear and front exhaust manifolds, taking care not to damage the oxygen sensors. Discard the gaskets. When installing the exhaust manifolds, apply anti-seize high-temperature grease to the manifold studs and always replace the gaskets. Tighten the manifold nuts to the specified torque.

Genuine BMW 325i Exhaust Manifold

Engine Exhaust Manifold

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Series

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

10 Exhaust Manifolds found

View related parts
BMW 325i Exchange Exhaust Manifold With Catalyst
Part Number: 18407545309
$1292.07 MSRP: $1632.21
You Save: $340.14 (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)
View related parts
BMW 325i Exchange Exhaust Manifold With Catalyst
Part Number: 18407514502
$2988.89 MSRP: $3972.75
You Save: $983.86 (25%)
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:
- 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
$1181.73 MSRP: $1534.33
You Save: $352.60 (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 Exhaust Manifold, Front
Part Number: 11621710834
$277.25 MSRP: $329.68
You Save: $52.43 (16%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exhaust Manifold, Manifold
- Position: Front
- 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 Exchange Exhaust Manifold With Catalyst
Part Number: 18407514503
$2988.89 MSRP: $3972.75
You Save: $983.86 (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: 18407515105
$1181.73 MSRP: $1534.33
You Save: $352.60 (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 Exhaust Manifold, Front
Part Number: 11621716736
$466.70 MSRP: $554.96
You Save: $88.26 (16%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exhaust Manifold, Manifold
- Position: Front
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
View related parts
BMW 325i Exhaust Manifold, Rear
Part Number: 11621716733
$466.70 MSRP: $554.96
You Save: $88.26 (16%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exhaust Manifold, Manifold
- Position: Rear
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
View related parts
BMW 325i Exhaust Manifold, Rear
Part Number: 11621710825
$277.25 MSRP: $329.68
You Save: $52.43 (16%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Exhaust Manifold, Manifold
- Position: Rear
- 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 Exchange Exhaust Manifold With Catalyst
Part Number: 18407545308
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)

BMW 325i Exhaust Manifold

The BMW 325i Exhaust Manifold collects burning hot gases from each cylinder and directs them into a common outlet, which passes through the catalytic converter and muffler. This design helps avoid backflow and prevents fumes from affecting passengers. Throughout the years of 325i production, there are two main designs of Exhaust Manifold, hefty cast iron for longevity and lighter welded steel or stainless tubing for improved flow. Both styles bolt to the BMW cylinder head using gaskets and then join to the downpipe using studs or bolts that seal tight under heat cycles. Selected BMW models feature the integration of the Exhaust Manifold or a threaded oxygen sensor port to enable fine-tuning of the fuel mixture from the engine computer. Heat shields enclose the Exhaust Manifold to protect wiring and cabin floors in the 325i from extreme temperatures that might make the vehicle uncomfortable to drive. If cracks appear as a result of repetitive expansion, a leaky Exhaust Manifold will throw off the air-fuel ratio, reduce power, and allow poisonous gas to leak into the cabin. Though usually reliable, doing a regular checkup on your BMW will help you catch damage early. There are those who want to improve the performance of their BMW by replacing the stock setup with free-flowing headers, as the factory balance of noise, emissions, and cost no longer satisfies 325i enthusiasts.

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

BMW 325i Exhaust Manifold Parts Questions & Experts Answers

Exchange Exhaust Manifold With Catalyst
18407545309
Q: How to remove the upper intake manifold and exhaust manifold on BMW 325i?
A:
To remove the intake manifold on a 2.0L engine, start by disconnecting the negative battery cable. Then, remove the engine cover, strut tower crossbrace, and sound insulator. Disconnect the wiring harness clips and move the harness out of the way. Remove the PCM control unit, release the quick-connectors for the fuel tank vent valve, and disconnect the electrical connectors to the fuel tank vent valve and throttle valve. Remove the charge air cooler hose and the intake plenum mounting nuts. Install the new intake plenum gaskets and tighten the nuts in stages. For a 3.0L engine, remove the Fuel Injectors and air filter housing. Disconnect the wiring plugs from the Throttle Body/manifold and release the wiring harness/cables from the retaining clips/bolts. Disconnect the breather hose from the manifold and remove the manifold retaining bolts. Lift the manifold and disconnect the hose on the base of the tank venting valve. Disconnect any hoses or wiring harnesses from the retaining clips on the manifold and support bracket. Remove the manifold from the cylinder head and check the condition of the seals. Replace them if necessary. To remove the exhaust manifolds on a 3.0L engine, raise the front of the vehicle and remove the engine splash shield. Remove the nuts securing the manifold outlets to the exhaust system and disconnect the electrical connectors for the oxygen sensors. Remove the cover over the ignition coils and the coolant expansion tank. Remove the rear and front exhaust manifolds, taking care not to damage the oxygen sensors. Discard the gaskets. When installing the exhaust manifolds, apply anti-seize high-temperature grease to the manifold studs and always replace the gaskets. Tighten the manifold nuts to the specified torque.