Classic Bosch K-Jetronic & KE-Jetronic Restoration
The CIS Parts Specialist: Restored Performance for Bosch K-Jetronic & KE-Jetronic Systems (1973–1994).
The Bosch CIS (Continuous Injection System) powered performance icons across two decades, from 1973–1994, for manufacturers including Mercedes-Benz, Porsche, Ferrari, Audi, Volvo, BMW, DeLorean, and more. These systems—even when well-maintained—are reaching a point where critical components are failing and are no longer available new (NLA).
NOTZAuto offers comprehensive, highly specialized restoration and rebuild services for the intricate components of your K/KE-Jetronic fuel injection system. We eliminate hard starting, rough running, and frustrating driveability issues.
1. NLA Components Requiring Expert Restoration
We focus on the components that are essential for CIS functionality but are almost impossible to replace:

- Fuel Distributors: Complete disassembly, deep cleaning, and reassembly. We ensure the metering piston, seals, and fuel delivery are precisely restored, eliminating leaks and erratic flow.
- Warm-Up Regulators (WURs): Full restoration and precise calibration of the WUR (Control Pressure Regulator) to guarantee accurate cold-start enrichment and proper operational control pressures.
- Throttle Body Assemblies: Cleaning and restoration of throttle body units, ensuring correct sealing and actuation.
- CIS System Components: We offer a wide array of restoration and rebuild services for various other system components unique to specific models across the entire 1973–1994 range.
2. Our Restoration Process: Sourcing and Precision

We carefully inspect every component and determine the exact scope of the restoration needed. Our successful rebuilds rely on creative sourcing and technical mastery:
- Hybrid Part Sourcing: Some parts for the rebuild are still available, but others require specialized sourcing. We utilize new old stock (NOS), custom manufactured parts, or carefully inspected and reconditioned used parts to complete the restoration.
- Precise Calibration: Components are meticulously calibrated against original Bosch specifications using specialized testing equipment, guaranteeing accurate fuel control pressures and delivery.
- Originality & Reliability: Our goal is always to deliver an item that performs reliably, often improving longevity over the original component, while maintaining its physical integrity and appearance.
3. Serving the CIS Community
Whether you own a classic Mercedes-Benz, a vintage Porsche, or a rare Ferrari, our experience across the full spectrum of K/KE-Jetronic applications ensures we can diagnose and restore your component correctly.
Stop letting a single NLA component dictate your engine’s performance. We take the mystery and frustration out of CIS ownership.
Ready for Reliable, Smooth K-Jetronic Performance?
Get a precise assessment and restoration plan for your fuel system components today.
Start Your Project Consultation → Click here!