Cylinder Head Cover BMW E90 E92 E93 M3 S65 Cylinder 1-4 7838267

Cylinder Head Cover BMW E90 E92 E93 M3 S65 Cylinder 1-4 is an original component from the Tappet and Valve Covers group, designed for the S65 engine in BMW 3 Series E90, E92, and E93 M3 models. The cover is responsible for tightly sealing the upper part of the cylinder head for cylinders 1–4, stabilizing the operation of the timing system and lubrication system in the V8 engine.

Specifications and technical data

• SKU: 7848153
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7848153
• Substitutable numbers: 7848153, 11127848153, 7838265, 11127838265, 7838267
• Category: Rocker & Valve Covers

Purpose and technical function

The valve cover for cylinders 1–4 in the S65 engine plays a key role in separating the timing chamber from the environment and maintaining proper operating conditions for the camshafts, tappets, and valves. It is responsible for:

• maintaining the tightness of the upper part of the cylinder head on the side of one of the V8 cylinder banks,
• stable routing of engine oil in the area of the tappets and valves,
• protecting timing components from external contaminants,
• maintaining the correct operating parameters of the crankcase ventilation system (PCV) within the cylinder head.

Thanks to its precise fit for the S65 unit, the cover works with the factory sealing system, which promotes stable engine operation at high RPMs, typical for the M3 version.

Original origin and compatibility

The component was designed by BMW as an OEM part for the S65 engine used in the M3 E90, E92, and E93. This ensures adherence to factory dimensional tolerances, correct placement of mounting points, and compatibility with original bolts, gaskets, and cylinder head accessories.

The original valve cover from this series is particularly important in high-revving units, where fitment accuracy and structural rigidity influence resistance to oil leaks and thermal stability. Using OEM parts reduces the risk of leakage issues that may occur with aftermarket replacements of lower manufacturing precision.

Condition, selection, and service application

The cover comes from disassembly and is offered as a used item, which allows for an economical yet technically sound repair of the S65 unit. This type of part is particularly useful in situations where:

• the original cover has cracked or suffered thermal deformation,
• there are persistent oil leaks from the cylinder head area on the side of cylinders 1–4,
• it is necessary to replace a damaged cover after service intervention or engine modifications.

Selecting this cover as a factory replacement allows for maintaining the structural integrity of the entire cylinder head system, which is important for both track use and daily driving.

Benefits of using an original valve cover

Using an original valve cover for cylinders 1–4 in the M3 S65 translates into a number of practical service and operational benefits:

• factory fitment to the cylinder head and engine accessories,
• preservation of the rigidity and geometry of the component as intended by the manufacturer,
• reduced risk of leaks in the area of the tappets and valves,
• easier installation due to compatibility with the original mounting system.

For M3 E90/E92/E93 users who care about the proper condition of the S65 unit, choosing an original cover from the Tappet and Valve Covers group is a solution consistent with the manufacturer's design specifications.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional covers, seals, or cylinder head protection elements, check out the available parts in the BMW Tappet and Valve Covers category.

Technical support and service knowledge

When working with BMW units, especially in M versions, it is worth relying on proven sources of knowledge regarding the selection and installation of OEM components. For other sub-assemblies, such as lighting or electronics, a practical guide describing the selection of used components and the principles of safe replacement may be helpful – you can find it in the article See more and better – a complete guide to selecting and replacing used LED and Xenon headlights, which shows the approach to original BMW parts in the context of quality and durability.

Summary

Cylinder Head Cover BMW E90 E92 E93 M3 S65 Cylinder 1-4 is a technically matched, original component designed for the S65 unit in the BMW M3 E90, E92, and E93 generations. Choosing this cover as a replacement part allows for maintaining the factory operating parameters of the timing and lubrication system within cylinders 1–4, which is particularly important in the high-revving V8 engine used in M3 models.