Build and Kill Zombies Parts and Rolls Guide

A Eurogamer report updated September 26, 2026 describes rolling for car parts and weapons. The report does not give a complete, permanent probability table. Treat every new part as a candidate for a specific job, not as an automatic replacement for a working component.

Named parts you can check in the game

The same dated report lists specific rewards from codes. These names help identify items in your inventory, but they are reported code rewards, not a complete roll pool or a guarantee that a code still works.

Reported item	Reported code	What to check in Roblox
Small Engine	COMMUNITY	Compare movement and handling with your current engine.
Small Tank	COMMUNITY	Check its displayed role and whether it solves a fuel or layout constraint.
Passenger Seats (2)	MOREFRIENDS	Check the space they use and whether your build needs extra seats.
Crossbow	PAINTEVERYWHERE	Test where it can engage enemies on your car.
Mounted Gun	PAINTEVERYWHERE	Test its firing position and coverage.

Source: Eurogamer’s September 26 code list. The source does not establish these items’ roll odds, exact damage, range, fuel capacity, or relative tier. The codes guide explains the redemption steps and dated status.

Sort a new part by purpose

Before installing it, inspect the name and any properties the live game displays. Ask what it could change:

1. Mobility: Could it help the car move or remain controllable?
2. Offense: Could it improve coverage or solve a repeatable damage gap?
3. Protection: Could it address the part that fails first?
4. Utility: Does it support a different goal you can actually test?

If a part has no clear job in your current car, keep the baseline rather than dismantling it immediately. A different build may make better use of that part later.

Use a one-part trial

Record your current vehicle in the car planner and note what ended the last run. Add the rolled part, leave other choices unchanged where practical, and try another wave. Compare the failure point, weapon coverage, and how easily the car drives.

Trial result	Next decision
The original weakness improves	Keep testing before making it permanent.
A different weakness appears	Decide whether the tradeoff matches your next goal.
No clear difference appears	Save the part for a later experiment rather than assuming it is worthless.

This avoids turning an unknown rarity label into a claim about exact performance. Drop rates, item values, and balance may change, so use the game’s current interface as the source for those details.

Plan spending around what you know

Rolling more parts and purchasing upgrades compete for your attention and resources. If a current car already performs well, the upgrade guide can help you choose a targeted purchase. If it fails because a weapon cannot reach threats, read the weapon placement guide first. New players can start with the first-car checklist before worrying about rarity.