> For the complete documentation index, see [llms.txt](https://www.sdv.guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.sdv.guide/sdv101/part-c-building-blocks/foundation-e-e-architecture/case-study-rivian.md).

# Case Study: Rivian

Rivian, a California-based EV startup specializing in adventure-oriented electric vehicles, provides an insightful example of innovation in E/E architecture. With strong partnerships, including Amazon and Volkswagen, Rivian has made remarkable progress in reducing the complexity of its vehicle architecture, as shared during their Investor Day 2024.

<figure><img src="https://392531723-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRqBHYU6DD895ydQm5PcS%2Fuploads%2FFF3mI0mBAyxqWdt5HPVt%2Fimage.png?alt=media&amp;token=0d1e3ec7-8385-4f98-8915-32a9ae5e588b" alt=""><figcaption></figcaption></figure>

In their first-generation vehicles, Rivian managed to reduce the number of ECUs to just 17, a stark contrast to the dozens typically used by incumbent OEMs. Currently, Rivian is working on its second-generation vehicles, further streamlining the design to only seven in-house developed ECUs.

<figure><img src="https://392531723-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRqBHYU6DD895ydQm5PcS%2Fuploads%2FJIAPvbsenQWpXTioi0dI%2Fimage.png?alt=media&amp;token=103fa6bd-c86e-47b9-98b5-821717d52b20" alt=""><figcaption></figcaption></figure>

This architecture employs a region-oriented zonal design, including east, west, and south zonal controllers, complemented by a few specialized ECUs for key functions such as infotainment, AD and ADAS, vehicle access control, and battery management.

<figure><img src="https://392531723-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRqBHYU6DD895ydQm5PcS%2Fuploads%2FbzXNxZFpMSsidVqcMc0y%2Fimage.png?alt=media&amp;token=a688fb4a-ea4c-4892-8249-5e7df74c0212" alt=""><figcaption></figcaption></figure>

The benefits Rivian reports from their Gen 2 architecture are striking:

* A 60% reduction in the number of ECUs compared to their first-generation vehicles.
* A 1.6-mile reduction in harness length, significantly reducing vehicle complexity.
* A weight reduction of 44 pounds per vehicle.
* A 40% cost reduction in the electrical Bill of Materials (BOM).

This case study underscores how Rivian and other EV startups are embracing zonal E/E architectures, central computing, and software-defined vehicle principles, achieving tangible benefits in cost, complexity, and efficiency. It highlights the competitive edge startups can gain by adopting cutting-edge approaches to E/E systems.