2013 vs 2017 Chevrolet Cobalt 6T30 axle seals: why the OE set cannot be copied across years
2013 Cobalt MH9 and 2017 Cobalt MNJ have different exact axle-seal OE rows. The difference does not by itself prove a supersession chain.
A model name is not enough to carry an axle-seal OE number across years. In OEProof’s current evidence, a 2013 Chevrolet Cobalt and a 2017 Chevrolet Cobalt sit in different transmission/RPO contexts and have different exact axle-seal primary rows.
2013 Cobalt: MH9 / FV1 context
E647 places exact 24230682 in the 2013 JX69/L2C/MH9/FV1 application. E648 places exact 24230715 in the same application context. The exact rows do not print side tokens, so the 2013 application claim must be kept separate from the broader industry RH/LH labeling.
2017 Cobalt: MNJ / FV1 context
E644 and E645 place exact 24273970 and 24273971 in the 2017–2018 JX69/L2C/MNJ/FV1 context. Unlike the 2013 rows, these primary rows directly print right axle for 24273970 and left axle for 24273971.
What changed? The evidence says the OE set changed; it does not tell us a universal replacement story
The safe conclusion is application-level: the captured primary OE rows differ between the bounded 2013 MH9 context and the bounded 2017 MNJ context. That is enough to reject “same Cobalt, therefore same seals”. It is not enough to claim 24230682 → 24273970 or 24230715 → 24273971 as a globally confirmed supersession chain.
Why this matters in procurement
Ordering by model name alone can mix parts from two different application contexts. For Cobalt-family enquiries, capture year, VIN, market and RPO/transmission context before translating the request into OE numbers. See the detailed pages for 2013 and 2017, or send the VIN through the RFQ.
Evidence boundary
This page is drafted from the current B3/fitment evidence and does not widen those source boundaries. Demand Intelligence was used only to choose the topic, not as technical evidence.