Query on XJR o2 sensor thread size. Its not m18
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Joined: Aug 2021
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From: Kansas City
The hex is 17 I beleive
The threads are 12 which is the size down from the spark plugs 14
More Information for BOSCH 13789
The threads are 12 which is the size down from the spark plugs 14
More Information for BOSCH 13789
Last edited by Parker 7; Feb 24, 2026 at 04:12 PM.
Veteran Member
Joined: Aug 2021
Posts: 4,634
Likes: 1,311
From: Kansas City
M12 , not sure how they measure that thread specifically vs, a solid hex head
You can find a cheap 12 spark plug for the crush washer as someone in Boston noticed a sensor performance difference if washer left off like on mine when I received her
You can find a cheap 12 spark plug for the crush washer as someone in Boston noticed a sensor performance difference if washer left off like on mine when I received her
Last edited by Parker 7; Feb 25, 2026 at 03:55 PM.
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