Genuine Mercedes Crankcase Breather Hose — M117 K-Jetronic V8

Genuine Mercedes Crankcase Breather Hose — M117 K-Jetronic V8

A genuine Mercedes-Benz crankcase breather hose for M117 V8 engines equipped with K-Jetronic (CIS) fuel injection. This hose connects the valve cover / cylinder head cover to the idling air distributor / auxiliary air valve, forming part of the crankcase ventilation system.

A deteriorated or cracked breather hose will cause vacuum leaks, rough idle, and incorrect air/fuel mixture. Replacement is recommended whenever the hose shows signs of cracking, hardening, or collapse.

1 required per car.

Part Numbers

Reference	Number
Mercedes Part Number	A 117 094 03 91

Mercedes part number variants (all refer to the same part): A1170940391 · A117 094 0391 · A117 094 03 91 · A 1170940391 · A 117 094 0391 · A 117 094 03 91 · 1170940391 · 117 094 0391 · 117 094 03 91

Vehicle & Engine Compatibility

Fits M117 K-Jetronic engines only — engine codes M117.960, M117.961, M117.962, M117.963, M117.985, M117.986

W116 (S-Class) 450SE · 450SEL — 1975 onwards

R107 (SL-Class) 450SL — 1975 onwards 500SL — to 1985

C107 (SLC-Class) 450SLC — 1975 onwards 450SLC 5.0 · 500SLC

W126 (S-Class) 500SE · 500SEL · 500SEC — to 1985

Notes

• Genuine Mercedes-Benz part — not aftermarket or pattern
• Connects valve cover / cylinder head cover to the idling air distributor / auxiliary air valve
• A cracked or hardened hose will cause vacuum leaks, rough idle, and poor fuel mixture — inspect at every service
• Fits M117 K-Jetronic (CIS) engines only — not suitable for later KE-Jetronic variants
• Contact us with your VIN if you are unsure of your engine code or model year