BMW i3 I01 Hybrid Rex Direct Ignition Coil 7729707

BMW i3 I01 Hybrid Rex Ignition Coil 7729707 is an original ignition system component from the BMW group, designed for gasoline engines in the Rex generator version. This series of ignition coil ensures stable high voltage generation, which translates to reliable fuel-air mixture ignition and proper operation of the internal combustion engine in the hybrid powertrain.

Specifications and technical data

• SKU: 7729707
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7729707
• Substitutable numbers: 12138569194, 8569194, 12137729707, 7729707
• Fuel type: Petrol
• Category: Ignition Coils

Purpose and Role in the Ignition System

The presented coil belongs to the Ignition Coils category and has been specifically designed to work with the gasoline engine in the BMW i3 I01 Rex version. Its function is to convert the vehicle's low voltage into the high voltage necessary for spark plug ignition, which is crucial for proper combustion and smooth operation of the internal combustion unit.

Thanks to its design conforming to the manufacturer's standards, the coil maintains correct electrical and insulation parameters, reducing the risk of misfires, uneven engine operation, or power loss. A properly selected component of this type is particularly important in hybrid powertrains, where the stability of the internal combustion engine's operation affects the smoothness of switching between driving modes.

Compatibility and Interchangeable Numbers

The ignition coil has been marked with a dedicated OEM part number and has assigned interchangeable numbers, which facilitates the selection of the correct component during servicing or replacement. The presence of reference numbers allows for the safe use of this coil in place of several earlier or parallel designations used by the manufacturer, without interfering with the electrical system or engine mechanics.

Before purchasing, it is advisable to compare the designations with your vehicle's data and the existing part to ensure that the selected component will work correctly with the specific gasoline engine configuration and control unit in your BMW i3 I01 Hybrid Rex.

Technical and Fuel Characteristics

The ignition coil in question is designed for units powered by gasoline, which is important when distinguishing components used in diesel and gasoline engines. Its electrical parameters and operating characteristics have been adapted to the requirements of the BMW ignition system, ensuring adequate spark energy across the full range of loads and rotational speeds.

As an original BMW part, the coil maintains factory standards of quality, insulation, and thermal resistance, which translates to predictable performance under the operating conditions typical for a hybrid system with a Rex generator.

Condition, Installation, and Service Application

The product is offered in used condition, making it an attractive service solution for users seeking original components at a reasonable price. The coil comes from disassembly and is intended for direct installation in place of the factory element, without the need for modifications to the wiring harness or socket.

In practice, installation involves replacing the element on the existing spark plug socket and connecting the factory electrical connector. Thanks to the preservation of original geometry and connectors, the risk of fitting problems is minimal, and the time required for replacement is reduced to the essential minimum.

Why Choose This BMW Ignition Coil

Choosing an original BMW ignition coil for the i3 I01 Hybrid Rex primarily means consistency with the original ignition system design and predictable performance in long-term operation. Maintaining compliance with manufacturer parameters reduces the risk of engine control unit errors, uneven running, or increased fuel consumption.

If you are planning comprehensive ignition system maintenance, spark plug replacement, or misfire diagnostics, using an original coil from this series ensures component consistency and facilitates further diagnostics of potential faults.

If you are considering upgrading or servicing the ignition system in your hybrid BMW i3 and want to better understand the potential of used parts for modifications and repairs, it is worth checking out the guide: Best Used Parts for Tuning Your Car, which discusses practical aspects of selecting aftermarket components.

If you also need other parts from the ignition coils category dedicated to this brand's vehicles, to comprehensively service your car's ignition system and maintain consistency of applied components, check the available parts in the BMW Ignition Coils category.