BMW 3 Series E90 E91 E92 E93 Left N/S Rear Silencer Heat Insulation Cover Plate

The BMW 3 E90/E91/E92/E93 Rear Muffler Left Heat Shield is an original body part designed to protect the rear muffler and surrounding components from excessive heat. This low-mileage part is a used part and is intended for installation on the left rear of the vehicle.

Specifications and technical data

• SKU: 7138485
• Mark: BMW
• Condition: Used
• OEM Part Number: 7138485
• Substitutable numbers: 51487138485, 7138485
• Location on the vehicle: Rear, Left

Purpose and function of the heat shield

The rear muffler heat shield in the BMW 3 Series E90, E91, E92, and E93 is responsible for effectively dissipating heat from the exhaust system. It protects body components, trunk upholstery, and rear wiring from overheating, reducing the risk of deformation and accelerated wear.

The left rear location of the vehicle ensures compatibility with the factory exhaust system and chassis design of these BMW 3 generation models. This ensures proper airflow geometry and stable attachment to the original mounting points.

Construction and fit for the BMW 3 Series

The cover is designed as an OEM component, meaning its shape, embossing, and mounting points are consistent with BMW factory specifications. This simplifies installation and maintains the original manufacturer-specified thermal protection.

The cover profile is matched to the line of the rear muffler and the trunk floor, which:

• ensures stable adhesion to the body,
• limits heat transfer to interior elements,
• helps maintain an appropriate level of thermal comfort in the rear of the cabin.

Condition, origin and benefits of choosing a used part

This used part comes from a BMW 3 Series disassembly and has low mileage, ensuring its functionality and continued serviceability. These heat shields are not subject to typical wear and tear like moving parts, so if in good mechanical condition, they can be safely used as a factory replacement.

Choosing an original, used heat shield is:

• better fit than many substitutes,
• maintaining the BMW factory thermal protection concept,
• a reasonable compromise between cost and quality.

Installation and service aspects

The cover is designed for installation in the rear left section of the vehicle, near the exhaust muffler. Installation involves bolting or securing it to the original mounting points in the floor and around the exhaust system. It is recommended that installation be performed by a mechanic or body shop experienced with BMW 3 Series bodywork, which will ensure proper alignment of the cover with the muffler and chassis components.

When replacing, it is worth checking the condition of:

• cover fasteners and clips,
• floor surface at the point of contact with the cover,
• rear muffler and adjacent exhaust system components.

Why is it worth using the original heat shield?

Installing a factory-fitted heat shield in your BMW 3 Series E90/E91/E92/E93 helps maintain the manufacturer's specified levels of thermal safety and comfort. The component's original geometry promotes proper heat dissipation, while its body-fit design reduces unwanted vibration and noise.

If you want to take more care of the thermal comfort in your car – both in terms of the exhaust system and the heating and cooling systems – it is worth reading the guide: how to select and service air conditioning and heating components for comfort all year round .

Summary

The left rear muffler heat shield for the BMW 3 Series E90/E91/E92/E93 is a used, original body part designed for installation in the rear left section of the vehicle. It provides effective thermal protection in the rear muffler area, helps maintain cabin comfort, and supports long-term protection of body components from overheating.