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Re: Did I miss the memo
Posted to Technical Tips Forum on 9/30/2020 4 Replies

Got caught on a 4 cyl highlander one time...B1S1 was no good...so I changed the one on manifold closest to the front of the engine...then I changed the correct one. The header tubes wrap around under the heat shield so B1S1 is closest to the rear of the engine... Login to read more.

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