Truck parts sales will decline in 2027, CMVC reports, and the culprit is the industry's own habit of buying early. Fleets rushing to pre-purchase equipment ahead of regulatory deadlines are pulling demand forward — and what gets pulled forward must eventually come back down.

The forecast lands at an awkward moment for the components supply chain. Parts distributors, remanufacturers and dealers have spent the current cycle riding elevated order books as carriers stockpiled trucks and, with them, the service parts that keep rolling stock alive. CMVC's read is that this sugar rush has a expiry date, and it reads 2027.

Why does a pre-buy hurt parts, not just truck sales?

The mechanics are straightforward. When fleets accelerate new-truck purchases to get ahead of emissions rules, they refresh their fleets with newer iron. Newer trucks break less, warranty covers more, and the average age of the parc drops. Every one of those effects squeezes the aftermarket — the parts counter, the independent repair shop, the component supplier waiting on replacement demand that has quietly moved three years into the future.

So the pre-buy that looks like a boom on the OEM order board reads, downstream, as a deferred bust. CMVC is essentially calling that deferral due in 2027.

What does this change for parts players?

For component makers and distributors, it reframes capacity planning. Anyone calibrating inventory, staffing or shelf space to current demand levels is anchoring to a peak that the forecast says won't hold. The prudent move — flagged implicitly by the report — is to treat 2025-2026 volumes as cyclical highs, not a new baseline.

For fleets and maintenance managers, the calculus inverts. A parts demand trough tends to soften pricing and improve availability in the aftermarket. If CMVC's timing holds, buyers of filters, brake components and wear parts may find 2027 a friendlier market than the one they're shopping in now.

For dealers and independent repair networks, the warning is blunter. Service revenue tied to older trucks — the bread and butter of the aftermarket — thins out when the parc skews young. The 2027 dip isn't a demand collapse; it's a hangover, and hangovers punish the unprepared disproportionately.

A familiar pattern, replayed

Anyone who watched the last emissions-driven pre-buy cycle will recognize the shape of this curve. The industry has been here before: a regulatory cliff, a stampede to the order desk, then a quiet couple of years while the market digests what it bought. CMVC's contribution is putting a date on the digestion phase.

The irony is that the very fleet segments that pre-buy hardest — the ones running newest equipment — are the least likely to need parts in the downturn window. The aftermarket's best customers, the operators of aging trucks, are the ones least able to pre-buy at all.

What to watch

The 2027 call rests on the pace of the current pre-buy actually materializing. If regulatory timelines shift or freight demand surprises, the pull-forward softens and so does the subsequent decline. If the pre-buy runs at full tilt, parts sellers get roughly two more strong years before the correction.

Either way, CMVC's message to the components side of the trucking industry is simple: enjoy the order book, but don't confuse it with the weather.