This real-world example of installing the Thunder active electronic exhaust system demonstrates how you can radically change the sound and appearance of a car. The owner of a facelifted BMW X5 E70 with a 3.0-litre diesel engine set us two tasks: to achieve the noble sound of a petrol V8 and to bring the rear end appearance in line with the top petrol versions.

Video: installation result

Before diving into the technical details, watch how this BMW X5 E70 sounds after installing the Thunder system:

Preparation for installation

Installing the active exhaust system on the BMW X5 E70 required removing the rear bumper to gain access to the sound generator mounting location. This is a standard procedure that allows the work to be done neatly and professionally.

The Thunder sound generators were installed in special niches behind the bumper — on the left and right. This positioning ensures optimal sound distribution and protects the generators from external influences.

Electrical part and connection

The connection of the system's electronic components was carried out taking into account the vehicle's standard wiring:

• CAN bus connection: performed on the right side in the boot at the fuse box. This ensures correct reading of engine speed data.
• 12V power supply: taken from the boot cigarette lighter socket — a reliable and safe power source.
• Electronic control units: placed on the right side in the boot niche, directly under the fuse box. This positioning protects the units from moisture and mechanical damage (please note: the control units are not waterproof and must only be installed inside the cabin).
• Wiring to the generators: routed through a standard factory technical opening in the body, located in the same place — on the right side in the boot. Using existing factory openings eliminates the need for drilling and guarantees the integrity of the body.

Exhaust tuning: switching to oval tailpipes

The car owner set an ambitious goal — to convert the rear end to match the appearance of the top petrol E70 models with the 4.8-litre engine. This required replacing the standard round exhaust tailpipes (typical for diesel versions) with oval, chamfered ones — so-called "diamond-shaped" tailpipes.

An important point: The owner categorically refused to install cheap Chinese oval tailpipes. Reasons:

• Chinese tailpipes differ significantly in shape and appearance from the originals
• Low quality of chrome plating — it peels off after just the first winter
• Incorrect mounting geometry

It was decided to use an original BMW retrofit kit consisting of:

• Two exhaust pipes (original part number: 18302185392)
• Plastic bumper trims (original part number: 51122167733)

The exhaust conversion process:

1. The old tailpipes were cut off together with part of the exhaust pipes strictly according to BMW's factory instructions
2. The new original pipes were installed using clamps — this ensures secure fixation and the possibility of removal if necessary

Bumper modification

Installing the new oval tailpipes required modifying the rear bumper:

• Larger cutouts were made in the bumper according to the factory markings on the back of the bumper
• The plastic trims from the original kit come primed and unpainted
• The trims were painted in the car's body colour
• The trims were fixed using special automotive sealant around the perimeter of the exhaust pipe outlets

Result: The rear of the vehicle is visually indistinguishable from the top petrol version of the BMW X5 E70 with the 4.8-litre engine.

Photo of the final result

Below is a photo of the car after all work was completed:

Features of this project

This installation example is interesting because it demonstrates a comprehensive approach to car tuning:

• Acoustic tuning: Installation of the Thunder active electronic exhaust system, which gives a diesel engine the sound of a petrol V8
• Visual tuning: Converting the rear of the car to match the top petrol versions with the installation of original BMW components
• Professional approach: Use of factory technical openings, original parts, and adherence to factory instructions

Why did the owner choose Thunder?

The owner of this BMW X5 E70 considered various options for changing the exhaust sound:

• Traditional exhaust tuning — removing particulate filters, installing straight-through pipes. Disadvantages: high cost, irreversible changes, the turbo whistle remains dominant.
• Factory active exhaust system — cuts off after 2000 rpm, no choice of sounds.
• Thunder — the ideal balance: 8 sound profiles, operation across all revs, volume control and full muting capability.

The choice was made in favour of Thunder, and the result exceeded expectations — the car acquired exactly the "high-quality" sound the owner wanted.

Technical installation details

For professionals and those interested in the technical side, here are the details:

• Vehicle model: BMW X5 E70 (facelift)
• Engine: 3.0-litre diesel
• Number of generators: 2 (for a full, rich sound)
• Generator mounting location: Niches behind the rear bumper on the left and right
• CAN connection: On the right in the boot at the fuse box
• Power supply: From the boot cigarette lighter socket
• Control units: In the boot niche under the fuse box
• Original BMW part numbers: 18302185392 (pipes), 51122167733 (bumper trims)

Conclusion

This project clearly demonstrates that the Thunder active electronic exhaust system is not just a "squeaker" in the boot, but a full-fledged tuning solution that can be integrated into a vehicle with high installation quality and attention to detail. Combined with visual enhancements, the result is impressive — the car is transformed both in sound and appearance.

If you want to carry out a similar project on your car or have questions about installation — contact our managers. We will help you select the right kit and recommend a trusted installation centre in your region.