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October 7, 2026 Service campaign

Revised Customer Satisfaction Notification 66D – Spark Plugs

Jeep technical service bulletin 66D Combo Rev2 for 2026-2027 Jeep Grand Cherokee and 2026-2027 Jeep Grand Cherokee L.

Bulletin number
66D Combo Rev2
Component
Engine
Summary
Revised Customer Satisfaction Notification 66D – Spark Plugs - Dealer Notification

Owners of these vehicles have filed 43 complaints in the engine category.

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