Mercedes GL X164 CDI Diesel OM629 Exhaust Manifold Pipe Left N/S A6291420301

Mercedes GL X164 CDI Diesel OM629 Exhaust Manifold Pipe Left N/S is a specialized exhaust system component designed for the OM629 series diesel engines. As a part from the Exhaust Manifolds category, it ensures precise exhaust gas discharge from the left side of the engine, supporting stable engine operation and correct performance parameters. This used OEM component is a sensible choice for conscious users looking for a technically matched solution for their Mercedes GL X164 CDI.

Specifications and technical data

• SKU: A6291420301
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6291420301
• Substitutable numbers: A6291420301, A 629 142 03 01
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Manifolds & Headers

Purpose and function in the exhaust system

The presented exhaust manifold has been designed to work with the OM629 diesel engine in the Mercedes GL X164 CDI model. It is responsible for collecting exhaust gases from the cylinders on the left side of the engine and directing them to the remaining components of the exhaust system. A correctly selected manifold is crucial for:

• maintaining proper exhaust gas flow in the diesel engine,
• stabilizing pressure in the exhaust channels,
• reducing power losses resulting from improper exhaust discharge,
• maintaining correct operating parameters of the turbocharger and exhaust emission control systems.

Thanks to a design tailored to the specific model and fuel type, the manifold supports uniform cylinder operation and predictable engine behavior across the full load range.

Vehicle placement and fitment

This exhaust manifold is intended for installation on the left side of the engine, which is important both when selecting parts and when planning service work. In V8 diesel engines, such as the OM629, distinguishing the installation side is crucial for proper fitment with the cylinder head, turbocharger, and subsequent sections of the exhaust system.

The original Mercedes origin means maintaining factory channel geometry, correct mounting point spacing, and compatibility with equipment intended for the GL X164 CDI. As a result, the manifold can be integrated into the existing system without the need for structural modifications, which shortens installation time and reduces the risk of leaks.

Characteristics of the used exhaust manifold

As a used item, the exhaust manifold for the Mercedes GL X164 CDI Diesel OM629 is a cost-effective solution while maintaining proper technical fitment. This type of part is particularly interesting in situations where:

• the original manifold has cracked or suffered thermal deformation,
• leaks have occurred at the connection with the cylinder head or the rest of the system,
• it is necessary to replace the component after cylinder head or turbocharger repairs.

A used OEM manifold allows for maintaining factory exhaust flow characteristics, which is especially important in diesel engines with extensive equipment, where changing channel geometry can affect operating parameters and electronic diagnostics.

Application in the OM629 diesel engine

The OM629 engine is an advanced diesel unit where the exhaust system operates under significant thermal and pressure loads. The exhaust manifold on the left side must work with the turbocharger, exhaust gas recirculation system, and other components responsible for emission reduction. Using a dedicated manifold for this type of engine helps to:

• maintain stable turbocharger operating conditions,
• preserve predictable pressure values in the exhaust system,
• reduce the risk of leaks at connections with the cylinder head and gaskets,
• ensure proper cooperation with diesel engine control systems.

For Mercedes GL X164 CDI users, this means more predictable vehicle behavior, easier diagnostics, and a better chance of trouble-free operation after repair.

Selection support and additional information

When selecting an exhaust manifold for a Mercedes, it is crucial to pay attention to compatibility with the specific engine unit and the installation side. In case of doubt, it is worth using the OEM part number or interchangeable numbers and vehicle data to avoid problems with installation and system tightness.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as manifolds, connecting sections, or connection elements, check the available parts in the Mercedes Exhaust Manifolds category.

For those who want to better understand the impact of the manifold on performance and exhaust system characteristics, an article describing performance solutions and the selection of used components will be useful – you can find it here: Performance exhaust system: used manifolds and sports catalytic converters on the road.

If you are considering whether an original, replacement, or used part is a better choice in your case, comparing the costs and benefits described in the material may also be helpful: Original, replacement, or used – which car parts are the most cost-effective?.