Exhaust Manifold Replacement

What is an exhaust manifold?

The exhaust manifold is located between the engine cylinder head and catalytic converter. It collects exhaust gas as it leaves the cylinder head.

How does the exhaust manifold work?

As the engine pumps hot exhaust gases out of the cylinder head, the exhaust manifold collects it, building pressure. Some exhaust manifolds are designed to store the extreme heat caused by the still-burning exhaust gases leaving the individual cylinders. This helps burn any residual fuel in the exhaust before the gas is sent to the next emission device, the catalytic converter.

When the exhaust manifold gaskets are leaking, you will hear a ticking or tapping noise, especially when the engine is cold. The noise may partially or totally disappear when the engine is warmed up.

What are the symptoms related to a bad exhaust manifold?

BMW 325xi Exhaust Manifold Replacement Cost by Year

The average cost for a BMW 325xi Exhaust Manifold Replacement is between $3,963 and $4,371 but can vary from car to car.

BMW 325xi Exhaust Manifold Replacement Cost

The average cost for a BMW 325xi Exhaust Manifold Replacement is between $3,963 and $4,371.

Labor costs are estimated between $594 and $872 while parts are priced between $3,369 and $3,500.
This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
For a more accurate estimate based on your location, use our Fair Price Estimator below.

Exhaust Manifold Replacement

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What is an exhaust manifold?

The exhaust manifold is located between the engine cylinder head and catalytic converter. It collects exhaust gas as it leaves the cylinder head.

How does the exhaust manifold work?

When the exhaust manifold gaskets are leaking, you will hear a ticking or tapping noise, especially when the engine is cold. The noise may partially or totally disappear when the engine is warmed up.

What are the symptoms related to a bad exhaust manifold?

If the exhaust manifold gets corroded to the point of cracking, you'll hear a tapping sound. Other possible symptoms include black smoke from the exhaust when you accelerate and a lit check engine light. If the muffler and exhaust pipe are hanging down, it can place additional strain on the exhaust manifold and cause its gasket to leak. » LEARN MORE: Exhaust manifold symptoms

Can I drive with an exhaust manifold problem?

No, driving a vehicle with a leak in the exhaust manifold is not recommended. It can ruin fuel mileage, cause you to fail a smog inspection, ruin the catalytic converter and cause damage to the exhaust valves.

How often do exhaust manifolds need to be replaced?

Most exhaust manifolds last the lifetime of the engine. But problems do occur, and the likelihood of replacement is based on age rather than mileage. Hot engine temperatures from imbalanced air-fuel ratios will cause leaks in manifolds at any mileage.

How are exhaust manifold issues diagnosed?

Identifying an exhaust manifold leak can be very easy if you hear ticking and can smell exhaust — but minor leaks can be tricky. Ordinarily, the vehicle will be raised and the exhaust manifold will be inspected for signs of leaks, such as black marks and nearby burned components. If there are no signs, the exhaust may be smoke tested or plugged to help diagnose it.

How is an exhaust manifold replaced?

The manifold retaining hardware and old gasket will be removed, and all touching surfaces should be cleaned thoroughly. If the manufacturer specifies sealant, it is applied to the gasket; otherwise, the gasket is placed on the exhaust studs. The new exhaust manifold will slide in place on the gasket, and the technician will torque the retaining fasteners to factory specification.