What is a Mopar build sheet?

A build sheet is the factory's own record of how a specific vehicle was assembled. For Mopar / CDJR vehicles it lists the sales codes, option packages, trim, drivetrain, paint, and equipment the vehicle left the plant with.

It's the most reliable way to confirm how a used Chrysler, Jeep, Dodge, or RAM was originally configured — far more dependable than a badge, a trim name, or a seller's description.

What the build sheet shows

The build sheet ties each factory sales code to the package or option it represents — appearance groups, trailering and towing equipment, axle ratios, interior materials, audio and technology, and safety features.

One package name can include several smaller features, so reading the build sheet carefully tells you what the vehicle actually carries, not just what the trim badge implies.

Standard vs. optional equipment

Standard equipment follows the trim or model; optional equipment reflects choices made when the vehicle was ordered. A build sheet makes the difference clear, which matters when two trucks or SUVs with the same model name feel very different in practice.

It also helps separate factory equipment from anything a dealer or previous owner added afterward — wheels, audio, badges, and accessories may have changed since delivery.

Is the 1D8 option useful outside of special conditions?

Engine & Fuel · 2021 Ram ProMaster · 588 views · 2 replies Solved

1D8 — Reserve For Emission Use. This code identifies the factory fuel-system, emissions, or exhaust configuration. Browse Sales Code codes →

Adam C. May 18, 2025 · New York

I am comparing two otherwise similar vehicles. One has 1D8: “Reserve For Emission Use. This code identifies the factory fuel-system, emissions, or exhaust configuration” How noticeable is the difference in real-world use, and are there any maintenance considerations?

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2 replies

Elena H. May 23, 2025

The dealer should be able to pull a VIN-specific equipment or parts record. Ask them to search by VIN rather than entering only the three-character code.

6 likes

Kate B. May 26, 2025 Accepted answer

Before buying, I would inspect the relevant component and take a photo of its label or part number. That often resolves whether the vehicle still has the factory configuration associated with 1D8.

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