How to find an RV part when you only know what broke

How do I find an RV part without a part number?

Work in this order: describe what is failing, narrow to a component family, confirm your appliance model, find that component on the model’s parts list, and read the part number off the row. Each step removes ambiguity the next step depends on, and skipping straight from symptom to a marketplace search is where most wrong orders begin.

The five steps

Nobody starts with a part number. They start with a toilet that will not hold water, or a fridge shelf that has cracked. The number is the end of the process, not the beginning.

How CamperReplacementParts identifies a partA five step chain running left to right: appliance model from the data plate, then component family, then the diagram item number, then the OEM part number, then the fitment evidence document and revision. A final step leads to the purchase path, which sits outside the evidence chain.1Appliance modeloff the data plate2Component familywhat actually failed3Diagram itemthe callout row4OEM part numberwhat you order5Fitment evidencethe document, the revisionPurchase path — separate from the evidence chainEvery step narrows the one before it
The commerce step sits deliberately outside the chain. What is for sale never decides what fits.
  • 1. Symptom — what is actually failing, in plain words.
  • 2. Component family — which kind of part causes that failure.
  • 3. Model — read it off the appliance label. This selects the parts list.
  • 4. Diagram row — find the component and note its item number.
  • 5. Part number — read it off that row. This is what you order.

You can start anywhere in the chain

The search box on this site accepts any of them. Type a symptom and it will show the parts documented to cause it. Type a component and it will show that family across every appliance we hold. Type a model and it will show everything documented for it. Type a number and it will resolve the number directly.

What it will not do is pretend a symptom match is a fitment answer. A symptom narrows the candidates; the model and the parts list settle which one is yours.

A worked example

  • Symptom — "bowl does not hold water between flushes"
  • Component family — blade seal
  • Model — Aqua-Magic V (read off the base label)
  • Diagram row — item 9 on the Aqua-Magic V parts list, Rev E
  • Part number — 31708

Try it in the parts finder

Where people go wrong

The common shortcut is symptom straight to a marketplace search — "rv toilet seal" — and then buying whichever result looks right. That skips the model entirely, which is the step that decides between parts that look identical.

The other common error is stopping at the brand. "Thetford" narrows almost nothing, because the same maker’s models take different components in the same position.

If the trail runs out

Sometimes the label is gone and the part is unrecognisable. Search what you can and tell us what appliance it was for — searches that find nothing are counted, and that count is what decides which manufacturer documentation gets worked through next.

Look up your part

Search a part number, an appliance model, or the component that failed. We check the manufacturer’s own parts lists first.

Open the parts finder

Related

Last checked 2026-08-30.