Standard Ignition EOS66 Engine Oil Separator
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Standard Ignition

Standard Ignition EOS66 Engine Oil Separator

Brand Standard Ignition EOS66
Attachment Method Bolt on
Color/Finish Black
Connector Gender No connector
Inlet Diameter (in) 0.04
Inlet Diameter (mm) 1.016
Nipple Orientation Angled
Outlet Diameter (in) 0.07
Outlet Diameter (mm) 1.778
Port Quantity 1
Fits Mazda · 12 vehicles

Bolt-on installation. Installs without modification for a straightforward replacement.

Engine oil separator. Helps manage oil vapor in the crankcase ventilation system.

Black finish. Clean, understated appearance for a factory-style look.

Cross-references Standard Ignition EOS66, EOS166 and MSAC20004 for the same application. See all 5.

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Engine Oil Separator for Mazda CX-50 and CX-9

Standard Ignition EOS66 is a bolt-on engine oil separator with a black finish and an angled nipple layout for clean routing in the engine bay. It is listed for Mazda CX-50 and Mazda CX-9 applications with PCV valve coverage noted in the fitment data.

  • Bolt-on attachment method for direct mounting
  • Black color/finish
  • No connector design
  • Angled nipple orientation
  • Single-port configuration
  • Inlet diameter: 0.04 in. (1.016 mm)
  • Outlet diameter: 0.07 in. (1.778 mm)

Product Details

This Standard Ignition EOS66 engine oil separator is built for vehicles that need controlled crankcase vapor routing and oil separation in the PCV system. The compact, bolt-on design supports a straightforward replacement on Mazda CX-50 and Mazda CX-9 models, and the angled nipple orientation helps match factory-style hose routing. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Symptoms It Can Address

  • Oil vapor buildup in the intake tract
  • PCV system flow irregularities
  • Oil residue around intake plumbing
  • Crankcase ventilation service needs
  • Replacement of a worn or leaking separator assembly

Installation Notes

Fits 2023-2025 Mazda CX-50, N/A, Includes PCV Valve. Fits 2016-2023 Mazda CX-9, N/A, Includes PCV Valve. Verify hose routing, mounting points, and connector-free configuration before installation. Standard Ignition EOS66 uses a bolt-on attachment method and a single port, so matching the original layout is important for proper fitment on Mazda CX-50 and Mazda CX-9 applications.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for engine management and emission-related service parts. EOS66 is cataloged with OE-style fitment references for the listed Mazda applications.

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelNotes
2026MazdaCX-50Includes PCV Valve
2025MazdaCX-50Includes PCV Valve
2024MazdaCX-50Includes PCV Valve
2023MazdaCX-50Includes PCV Valve
2023MazdaCX-9Includes PCV Valve
2022MazdaCX-9Includes PCV Valve
2021MazdaCX-9Includes PCV Valve
2020MazdaCX-9Includes PCV Valve
2019MazdaCX-9Includes PCV Valve
2018MazdaCX-9Includes PCV Valve
2017MazdaCX-9Includes PCV Valve
2016MazdaCX-9Includes PCV Valve
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Standard Ignition — EOS66EOS166MSAC20004PWS313570SEP770