Every commission, scoped first.

Modern European cars are networks on wheels. We read them with professional, manufacturer-level diagnostic tooling, then confirm every finding with methodical testing.

• Full-system scans and fault-memory analysis
• Live data and guided test plans
• Electrical and network fault tracing
• Coding and adaptations where supported
• Pre-purchase inspections
• Warning lights, drivability, and intermittent faults

Sonoma Autoworks is an independent specialist. We use professional diagnostic equipment with dealer-level capability where applicable; we are not a franchised dealer or a manufacturer-certified facility.

Service performed to the manufacturer’s intervals with OEM-correct parts and specified fluids, recorded so the car’s history stays complete.

• Oil and filter service to specification
• Major and minor interval services
• Spark plugs, filters, and belts
• Brake fluid and coolant exchange
• Transmission and differential fluids
• Detailed service records for your file

How a car stops and settles defines how it feels. We restore that poise with correct components and careful setup.

• Pads, rotors, and caliper service
• Ceramic and high-performance brake systems
• Dampers, springs, and bushings
• Air and adaptive suspension diagnosis
• Four-wheel alignment to specification
• Wheel and tire fitment advice

Upgrades chosen for balance, not bravado. We recommend parts from respected suppliers and install them with the same care as factory service.

• Exhaust and intake systems
• Suspension and chassis upgrades
• Brake upgrades for track use
• Track-day preparation and inspection
• Lightweight wheels and tire selection
• Road testing and setup refinement

The coachwork is the first thing anyone sees. We preserve it with correction, coating, and protection matched to how the car is driven and stored.

• Multi-stage paint correction
• Ceramic coating
• Paint protection film consultations
• Color-change and accent wrap consultations
• Interior leather and Alcantara care
• Pre-sale and concours preparation

Older cars ask for patience and a different set of skills. We care for them sympathetically, preserving originality wherever possible.

• Air-cooled and early water-cooled care
• Carburetor and mechanical injection service
• Period-correct electrical repair
• Recommissioning after storage
• Sourcing of correct and rare parts
• Condition reports and documentation