Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Oxygen Sensor: Service Precautions

CAUTION: When installing a new HO2S, it is possible that the new component will be supplied with a longer cable than the one removed. It is important that the cable is routed and secured in such a way that it cannot be damaged by heat or moving components and will not cause a Noise, Vibration or Harshness (NVH) issue.