Genuine Bosch 009 Ignition Rotor (04-004) — Resistor Type

Short answer: This is the genuine Bosch 04-004 resistor rotor (98-9821-B, 5k Ohm) for the Bosch 009 and 050 distributors. It fits VW Beetle, Super Beetle, Bus, Karmann Ghia, Type 3 and Porsche 356 and 912 running a 009.

Ensure precise timing and a strong spark with this Genuine Bosch 04-004 Ignition Rotor, designed specifically for the Bosch 009 Centrifugal Advance Distributor used in air-cooled Volkswagen and early Porsche ignition systems.

Vehicle Fitment

• VW Beetle 1949–1979 & Super Beetle 1971–1979: equipped with the Bosch 009
• VW Bus / Transporter 1950–1979: equipped with the Bosch 009
• VW Karmann Ghia 1956–1974 & Type 3 1962–1973: equipped with the Bosch 009
• Porsche 356 1950–1965 & 912 1965–1969: equipped with the Bosch 009

Key Features & Benefits

• Correct Fitment: Engineered for Bosch 009 and 050 distributors.
• High-Dielectric Construction: Resists voltage leaks and carbon tracking.
• Resistor Design: 5k Ohm resistor-style rotor matches factory ignition requirements and reduces RFI interference.

Technical Specifications

• Brand: Bosch (Genuine)
• Fits: Bosch 009 Distributors (and 050)
• Resistance: 5k Ohm (resistor style)
• Bosch Reference: 04-004 (also fits 04 033 applications)
• Part Number: 98-9821-B

Frequently Asked Questions

• Which distributors does this rotor fit? The Bosch 009 and 050 distributors.
• Is this a resistor rotor? Yes — it is a 5k Ohm resistor-style rotor that reduces RFI interference.
• What's the part number? 98-9821-B, which is the genuine Bosch 04-004 rotor. It also covers 04 033 applications.
• Will it fit my Porsche? Yes, on a Porsche 356 or 912 running the Bosch 009 distributor. It also fits VW Beetle, Super Beetle, Bus, Karmann Ghia and Type 3 with a 009.
• How does it ship? As a small parcel, boxed at about 3 x 2 x 2 in.

Explore Related Categories

Ignition, All VW Air-Cooled, All Porsche

Parts are legal for use on pre-pollution-controlled vehicles only.

Prop 65 Warning

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.