The project

Building RENNSTIL's digital foundation

Procar Automobile has been an established automotive company for decades (founded in 1989) and already operates several successful online shops. With RENNSTIL, however, a new premium brand was created, specializing in the refinement and performance optimization of BMW M models. Brand launches follow a different set of rules: positioning, shop experience, processes, and time-to-market all need to be right from the very beginning.

Without clear guardrails, typical launch risks were imminent: a delayed market entry, lack of digital visibility at launch, and inefficient coordination that can quickly slow a project down.

The challenge

Create focus and turn complexity into a scalable shop foundation

The main challenge wasn’t just the technology, but setting the right priorities: which features need to be ready from day one, and which can come later. The key was to avoid overload and focus on launching a clean, brand-aligned MVP—without compromising on the premium feel or user experience.

• 

  Services

  Online Shop Launch

• 

  Technology

  Shopify

   

• 

  Unique Feature

  Customers can request purchased parts with on-site installation appointments 

   

• 

  Project Timeline

   April - October 2025
  

The goal

Premium commerce that grows with the brand

Together with Procar, we defined a setup that consistently delivers on three key aspects:

• A clear e-commerce strategy tailored to the market and target audience

• UX and design that bring the RENNSTIL brand identity to life

• A scalable Shopify platform that cleanly supports growth, assortment expansion, and ongoing optimization

Our approach: From strategy to shop

Our collaboration was built on a transparent and structured workflow, ensuring a smooth and efficient process for launching the new brand.

• 01Strategic planning
  

  We helped Procar define a clear strategy and user experience (UX) for presenting the RENNSTIL brand and its products online. This involved defining the right focus, preventing the client from trying to tackle too many issues at once, which was the single biggest risk we helped them avoid.

• 02Hands-on collaboration
  

  We established regular status calls, a detailed project plan with clear milestones, and pre-launch questionnaires. Hands-on workshops were conducted to align on UX and functionality, ensuring the final product matched the vision for the new brand.

• 03Technical implementation
  

  We built the online store on Shopify, utilizing a standard theme with customizations to ensure flexibility and a scalable foundation for future growth. A key unique feature we developed was the ability for customers to request the installation of purchased parts at a physical shop, bridging their online and offline services.

• 04Knowledge transfer
  

  Post-launch in October 2025, we provided comprehensive Shopify backend training, empowering the Procar team to manage content, handle orders, and maintain their new digital channel independently.
  

The result

• On-time delivery & high satisfaction: The project was completed within the planned timeline. The collaboration was marked by SUNZINET's reliability, transparent communication, and structured approach—key factors in a successful new brand launch.

• A true digital transformation: The launch of the Shopify store gives RENNSTIL a modern, digital-first storefront that reflects its premium positioning and meets the expectations of today's car enthusiasts.

• A foundation for future growth: The project established a scalable system architecture with Shopify, including a scalable shipping and freight cost logic. Critically, it empowered the client to maintain the store independently, with SUNZINET acting as a strategic backup for future developments.

Andre Hornung Site Manager for Wuppertal and Brand Manager for RENNSTIL at Procar Automobile

As our first step into e-commerce, we needed a partner who could guide us through the entire process with clarity and structure. SUNZINET delivered exactly that. Their transparent communication, reliable project management, and ability to keep us focused on the right priorities made all the difference. We now have a scalable online shop that truly represents the RENNSTIL brand.

Future plans

After the successful launch, SUNZINET continues collaborating with Procar Automobile on follow-up projects, such as ongoing Shopify optimizations and the implementation of marketing automation with HubSpot. We're also supporting them with newsletter campaigns to drive engagement with their new online platform.

About Rennstil

RENNSTIL is a German premium brand within the Procar Automobile Group, specialising in the refinement and performance optimisation of BMW M models. As part of the company founded in 1989, RENNSTIL combines long-standing expertise in the automotive industry with modern performance engineering and high-quality customisation solutions for car enthusiasts. With around 1,400 employees, the brand is a key player in the automotive industry and is continuously expanding its digital presence.