Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2013128I 2D CONVERTIBLE, ENG CD N52, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2056 (COLLISION - BODY PANEL REPAIR (F01, F02))BODY REPAIR GENERAL INFORMATION41 00... MATERIALS SCIENCEALUMINUMMATERIAL INFLUENCES
2013 BMW 128i 2D Convertible, Eng CD N52, Standard Trans
Material influences
2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION Material influences
WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
| Causes | Effects / remedies |
|---|---|
| A galvanic element is created under the effects of moisture by contact with materials such as copper, tin, nickel, iron and zinc. | This plating process causes aluminium to be removed from the joint. This results in surface corrosion or pitting. New parts and accessory parts which have been approved by the BMW Group for aluminum (screws, washers, nuts etc.) have undergone special surface treatment. Such parts must not be replaced by conventional parts.
NOTE:
Damaged parts lose this protection and must be specially coated or replaced. Damage caused by contact corrosion is excluded from the warranty. |
| Materials also used for work on steel components can implant steel particles in the softer surface of an aluminium component. | Surface corrosion or pitting occurs. A separate tool kit is available for processing/machining aluminum. |
| Surfaces are attacked when fluxing agents are used. | Soldering is not permitted for joining aluminum components. Risk of corrosion from chemical factors. |
| Aluminum/steel grinding dust from adjoining work areas. | This results in surface corrosion. Erection of protective barriers. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.