BMW 5 6 E60 M5 E63 M6 1-5 VANOS Valve Variable Timing Adjustment Unit 7841073

BMW 5 6 E60 M5 E63 M6 1-5 VANOS Valve Variable Timing Adjustment Unit is an original variable valve timing system component designed for BMW 5 and 6 Series sports models. This precision module, which controls camshaft operation for cylinders 1–5, helps maintain stable engine characteristics, proper throttle response, and smooth engine performance. Thanks to its factory BMW design, the part ensures a perfect fit for the VANOS system without the need for any modifications.

Specifications and technical data

• SKU: 7841073
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7838395
• Substitutable numbers: 11367841073, 7841073, 11367836240, 7836240, 11367839844, 7839844, BG
• Category: Other Engine Parts

Purpose and function in the BMW M5 / M6 engine

The described VANOS adjustment unit is responsible for precise control of variable valve timing in engines fitted to the BMW 5 Series E60 M5 and 6 Series E63 M6. The component works with the engine's control electronics, adjusting the position of the camshafts for cylinders 1–5 depending on load, engine speed, and operating conditions.

A properly functioning VANOS module helps maintain:

• stable power and torque across a wide RPM range,
• appropriate dynamics during acceleration,
• smoother engine operation at idle.

Original BMW design

As an original BMW part, the variable valve timing adjustment module is designed specifically for the requirements of the engines used in the M5 E60 and M6 E63. This ensures factory tolerances are maintained, proper fitment with the cylinder head, and compatibility with the factory engine control unit.

Key advantages of the original design include:

• maintenance of performance parameters specified by the manufacturer,
• no need for mechanical or electrical adaptation,
• consistency with other VANOS system components.

Condition and service application

The item is offered as a used part, which allows for an economical repair of the variable valve timing system while maintaining original BMW specifications. This type of module is particularly useful for:

• diagnosing and resolving VANOS operation issues for cylinders 1–5,
• restoring correct engine characteristics after an adjustment system failure,
• servicing engines in specialized workshops dealing with M models.

Thanks to its factory construction, the part can be integrated into the existing system without interfering with the engine structure, which helps preserve the vehicle's original configuration.

Selection support and integration with other components

When selecting a VANOS module for a BMW M5 E60 or M6 E63, it is worth paying attention to compatibility with the specific engine version and cylinder head configuration. Original manufacturer markings and interchangeable part numbers make it easier to match the part to a specific vehicle, minimizing the risk of issues during installation and initial startup.

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 control valves, adjustment modules, or additional timing system parts, check out the available parts in the Other BMW category.

Technical knowledge and development of high-power units

Variable valve timing systems, such as the VANOS used in BMW sports models, are a key element of modern high-power engines. To compare solutions used in other brands and segments, it is worth reading an analysis of high-performance engine designs – differences in cylinder head construction, valve control, or accessory selection are well illustrated in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the specifics of engines and braking systems in sports-oriented cars.