Seat

901 305 311 00

Engine suspension Safety 4 · Functional

Enhanced alternatives

None catalogued. No aftermarket replacement for this reference has been found and verified. That is a finding rather than a gap in research: for structural 993 carriers and brackets, the aftermarket largely does not exist, which is precisely what makes them reproduction candidates.

Full catalogue illustration 109-00

Porsche parts catalogue illustration 109-00, showing Seat at position 7 — Illustration 109-00, catalogue page 89. This part is **position 7**.
© Dr. Ing. h.c. F. Porsche AG · KAT 17

Catalogue record

Reference	901 305 311 00
Name	Seat ·
Catalogue group	Engine suspension
Position	7
Quantity per car
Catalogue evidence	Engine suspension · 7 B · 901 305 311 00 · seat
Verified	2026-08-19 Porsche PET — 911 1989–1994 Type 964 · KAT 17

Fitment

Not established. The catalogue line carries no model or option-code annotation, so no fitment is claimed here rather than inferred from the generation.

Specification

OEM material	unknown — not recorded rather than estimated
OEM weight	unknown
OEM price	unknown
Rotating mass	No
Unsprung mass	No

A 901 part number — the original 911 type — still listed in the 964 group and again in the 993 group at position 13. The oldest reference in this dataset, and the clearest single illustration of how long a 911 part number can stay in service.