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2019–2020 RAM 2500/3500 · 6.7L CUMMINS

Ram Y78 recall

Safety recall Y78 covers a Bosch CP4 high-pressure fuel pump on certain 2019–2020 Ram 2500/3500 Cummins trucks that can fail and send metal through the fuel system. Paste a VIN below to see if it applies — this is a real recall, so it's free to fix if it's still open.

NHTSA safety recallFree if open on this VIN

Why this matters before you buy

A CP4 that fails without warning doesn't just strand you — metal debris circulates through the rails, lines, and injectors, turning a pump swap into an $8,000–$15,000 repair off-warranty. If recall Y78 is still open on a VIN, the whole thing — pump, PCM reflash, and any contaminated parts — is done for free. If it's already closed, that's a truck that already got the fix. Either way, you want to know before you own it, not after it stalls on the highway.

Where this shows up on a CurbSpec sheet

The Ram HD Cummins family cites Y78 as a known issue, tiered as an official safety recall with the real NHTSA campaign and TSB numbers:

Full Ram 2500/3500 Cummins known issues and due-spend sheet →

Frequently asked

What is Ram recall Y78?
Safety recall Y78 (NHTSA campaign 21V-880) covers certain 2019-2020 Ram 2500/3500 trucks with the 6.7L Cummins that were built with a Bosch CP4 high-pressure fuel pump. The CP4 can fail internally and send metal debris through the fuel rails and injectors, causing a stall, hard start, or no-start — often alongside a fuel-pressure code.
Is this a recall or just a TSB?
It's a real NHTSA safety recall, not just a service bulletin — which means Ram is required to notify affected owners directly and fix it for free if the recall is still open on that VIN. A related TSB (14-008-22) helps technicians identify whether a given truck has the CP4 or the earlier CP3 pump.
What does the recall repair include?
The fix replaces the CP4 pump with a CP3.3, updates PCM software, and inspects (and replaces if needed) fuel-system parts contaminated by metal debris — rails, lines, and injectors. Done under an open recall, it's free.
Is my truck affected?
Only certain 2019-2020 Ram 2500/3500 6.7L Cummins trucks built with the CP4 are in the recall population — 2018-and-older 6.7s used a CP3 originally, and trucks built after the recall's production cutoff (Nov 13, 2020) are outside it. The only way to know for sure is to check the specific VIN.
What if the recall isn't done and it fails anyway?
Off-warranty repair for a failed CP4 that's contaminated the fuel system runs roughly $8,000-$15,000 — pump, injectors, rails, lines, and a tank flush. That's a very different number than a free recall repair, so it's worth confirming Y78's status before assuming either way.