Problem is, its not the one its leaning on that fails.
People dont realize, fuel leak = left engine mount replacement in about 1 month.
On my old 617, I never replaced a right hand mount in 800k miles, replaced 3 left ones.
I have replaced the left one on my 124, destroyed by PO with fuel leak. Right one is still within spec for support.
Normally mounts are cheaper in pairs. Maybe some one got 3 at once.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving