diff --git a/app/components/PieceItem.vue b/app/components/PieceItem.vue
index 579c535..e2effb4 100644
--- a/app/components/PieceItem.vue
+++ b/app/components/PieceItem.vue
@@ -42,6 +42,7 @@
               Rattachée à {{ piece.parentComponentName }}
             </span>
             <span v-if="pieceData.reference" class="badge badge-outline badge-sm">{{ pieceData.reference }}</span>
+            <span v-if="pieceData.referenceAuto" class="badge badge-secondary badge-sm" title="Référence auto">{{ pieceData.referenceAuto }}</span>
             <template v-if="pieceConstructeursDisplay.length">
               <span
                 v-for="constructeur in pieceConstructeursDisplay"
@@ -106,6 +107,10 @@
           pieceData.reference || "Non définie"
         }}</span>
       </div>
+      <div v-if="pieceData.referenceAuto">
+        <span class="font-medium">Référence auto:</span>
+        <span class="ml-2">{{ pieceData.referenceAuto }}</span>
+      </div>
       <div>
         <span class="font-medium">Fournisseur:</span>
         <div v-if="!isEditMode" class="ml-2">
@@ -301,6 +306,7 @@ const emit = defineEmits(['update', 'edit', 'custom-field-update', 'delete'])
 const pieceData = reactive({
   name: props.piece.name || '',
   reference: props.piece.reference || '',
+  referenceAuto: props.piece.referenceAuto || null,
   prix: props.piece.prix || '',
   productId: props.piece.product?.id || props.piece.productId || null,
   quantity: props.piece.quantity ?? 1,
diff --git a/app/components/model-types/ModelTypeForm.vue b/app/components/model-types/ModelTypeForm.vue
index 4742b5c..a0238eb 100644
--- a/app/components/model-types/ModelTypeForm.vue
+++ b/app/components/model-types/ModelTypeForm.vue
@@ -108,6 +108,57 @@
       </template>
     </section>
 
+    <section v-if="form.category === 'PIECE'" class="space-y-4">
+      <header>
+        <h3 class="text-lg font-semibold text-base-content">Génération de référence automatique</h3>
+        <p class="mt-1 text-sm text-base-content/70">
+          Définissez une formule pour générer automatiquement une référence technique à partir des champs personnalisés.
+          Utilisez <code class="bg-base-200 px-1 rounded">{'{'}nom_du_champ{'}'}</code> comme placeholder.
+        </p>
+      </header>
+
+      <div class="rounded-lg border border-base-300 p-4 space-y-4">
+        <div>
+          <label class="label" for="reference-formula">
+            <span class="label-text">Formule</span>
+          </label>
+          <input
+            id="reference-formula"
+            v-model.trim="form.referenceFormula"
+            type="text"
+            class="input input-bordered w-full font-mono"
+            placeholder="Ex: {serie}{diametre}{type}"
+            :disabled="isReadonly"
+          />
+          <p class="mt-1 text-xs text-base-content/60">
+            Laissez vide si ce type n'utilise pas de référence automatique.
+          </p>
+        </div>
+
+        <div>
+          <label class="label" for="required-fields">
+            <span class="label-text">Champs requis</span>
+          </label>
+          <input
+            id="required-fields"
+            v-model.trim="requiredFieldsInput"
+            type="text"
+            class="input input-bordered w-full"
+            placeholder="Ex: serie, diametre, type"
+            :disabled="isReadonly"
+          />
+          <p class="mt-1 text-xs text-base-content/60">
+            Noms des champs séparés par des virgules. Si un champ requis est vide, la référence ne sera pas générée.
+          </p>
+        </div>
+
+        <div v-if="form.referenceFormula" class="rounded bg-base-200 px-3 py-2 text-sm">
+          <span class="text-base-content/70">Aperçu :</span>
+          <span class="ml-1 font-mono font-semibold">{{ formulaPreview }}</span>
+        </div>
+      </div>
+    </section>
+
     <footer class="flex flex-col gap-3 border-t border-base-300 pt-4 sm:flex-row sm:justify-end">
       <button type="button" class="btn btn-ghost" :disabled="saving" @click="emit('cancel')">
         Annuler
@@ -177,12 +228,21 @@ const componentSubcomponentMaxDepth = computed(() =>
 )
 const isReadonly = computed(() => props.readonly === true)
 
-const form = reactive<ModelTypePayload>({
+const form = reactive<ModelTypePayload & { referenceFormula?: string | null; requiredFieldsForReference?: string[] | null }>({
   name: '',
   code: '',
   category: props.initialCategory,
   notes: '',
   structure: undefined,
+  referenceFormula: null,
+  requiredFieldsForReference: null,
+})
+
+const requiredFieldsInput = ref('')
+
+const formulaPreview = computed(() => {
+  if (!form.referenceFormula) return ''
+  return form.referenceFormula.replace(/\{(\w+)\}/g, '___')
 })
 
 const errors = reactive<{ name?: string }>({})
@@ -248,6 +308,11 @@ const resetForm = () => {
 
   errors.name = undefined
 
+  const incomingAny = incoming as Record<string, unknown>
+  form.referenceFormula = typeof incomingAny.referenceFormula === 'string' ? incomingAny.referenceFormula : null
+  form.requiredFieldsForReference = Array.isArray(incomingAny.requiredFieldsForReference) ? incomingAny.requiredFieldsForReference : null
+  requiredFieldsInput.value = form.requiredFieldsForReference?.join(', ') ?? ''
+
   resetStructures(incoming.structure, form.category)
 }
 
@@ -295,11 +360,16 @@ const handleSubmit = () => {
   }
 
   if (form.category === 'PIECE') {
+    const parsedRequiredFields = requiredFieldsInput.value
+      ? requiredFieldsInput.value.split(',').map(s => s.trim()).filter(Boolean)
+      : null
     emit('submit', {
       ...common,
       category: 'PIECE',
       structure: normalizePieceStructureForSave(clonePieceStructure(pieceStructure.value)),
-    })
+      referenceFormula: form.referenceFormula || null,
+      requiredFieldsForReference: parsedRequiredFields?.length ? parsedRequiredFields : null,
+    } as ModelTypePayload)
     return
   }
 
diff --git a/app/composables/usePieces.ts b/app/composables/usePieces.ts
index 97b7fe7..a55bdde 100644
--- a/app/composables/usePieces.ts
+++ b/app/composables/usePieces.ts
@@ -10,6 +10,7 @@ export interface Piece {
   id: string
   name: string
   reference?: string | null
+  referenceAuto?: string | null
   description?: string | null
   typePieceId?: string | null
   typePiece?: { id: string; name?: string } | null
diff --git a/app/pages/piece/[id].vue b/app/pages/piece/[id].vue
index 857fbca..b5f8f7c 100644
--- a/app/pages/piece/[id].vue
+++ b/app/pages/piece/[id].vue
@@ -113,6 +113,17 @@
             </div>
           </div>
 
+          <!-- Référence auto (read-only, shown only if computed) -->
+          <div v-if="piece.referenceAuto" class="form-control">
+            <label class="label">
+              <span class="label-text">Référence auto</span>
+            </label>
+            <div class="input input-bordered input-sm md:input-md bg-base-200 flex items-center gap-2">
+              <span class="font-mono font-semibold">{{ piece.referenceAuto }}</span>
+              <span class="badge badge-sm badge-ghost">auto</span>
+            </div>
+          </div>
+
           <!-- Référence + Fournisseurs (if value or edit mode) -->
           <div
             v-if="isEditMode || piece.reference || editionForm.constructeurIds.length"
diff --git a/app/pages/pieces-catalog.vue b/app/pages/pieces-catalog.vue
index 3bcb89c..11a4202 100644
--- a/app/pages/pieces-catalog.vue
+++ b/app/pages/pieces-catalog.vue
@@ -69,6 +69,10 @@
             {{ row.piece.reference || '—' }}
           </template>
 
+          <template #cell-referenceAuto="{ row }">
+            {{ row.piece.referenceAuto || '—' }}
+          </template>
+
           <template #cell-description="{ row }">
             <div v-if="row.piece.description" class="group relative">
               <span class="block cursor-help truncate">{{ row.piece.description }}</span>
@@ -174,6 +178,7 @@ const columns = [
   { key: 'preview', label: 'Aperçu', width: 'w-24' },
   { key: 'name', label: 'Nom', sortable: true },
   { key: 'reference', label: 'Référence' },
+  { key: 'referenceAuto', label: 'Réf. auto' },
   { key: 'description', label: 'Description' },
   { key: 'suppliers', label: 'Fournisseurs' },
   { key: 'typePiece', label: 'Type de pièce', filterable: true, filterPlaceholder: 'Filtrer…' },
diff --git a/app/pages/pieces/[id]/edit.vue b/app/pages/pieces/[id]/edit.vue
index 0724c79..c1b6c68 100644
--- a/app/pages/pieces/[id]/edit.vue
+++ b/app/pages/pieces/[id]/edit.vue
@@ -114,6 +114,19 @@
             >
           </div>
 
+          <div v-if="piece?.referenceAuto" class="form-control">
+            <label class="label">
+              <span class="label-text">Référence auto</span>
+            </label>
+            <input
+              :value="piece.referenceAuto"
+              type="text"
+              class="input input-bordered input-sm md:input-md bg-base-200"
+              disabled
+              title="Générée automatiquement à partir du type et des champs personnalisés"
+            >
+          </div>
+
           <div class="form-control">
             <label class="label">
               <span class="label-text">Fournisseur</span>
diff --git a/app/services/modelTypes.ts b/app/services/modelTypes.ts
index 20de184..99efb6b 100644
--- a/app/services/modelTypes.ts
+++ b/app/services/modelTypes.ts
@@ -28,6 +28,8 @@ export interface ComponentModelTypePayload extends BaseModelTypePayload {
 export interface PieceModelTypePayload extends BaseModelTypePayload {
   category: 'PIECE';
   structure?: PieceModelStructure | null;
+  referenceFormula?: string | null;
+  requiredFieldsForReference?: string[] | null;
 }
 
 export interface ProductModelTypePayload extends BaseModelTypePayload {
@@ -46,6 +48,8 @@ export interface ModelType extends BaseModelTypePayload {
   updatedAt: string;
   category: ModelCategory;
   structure: ModelTypeStructure;
+  referenceFormula?: string | null;
+  requiredFieldsForReference?: string[] | null;
 }
 
 export interface ModelTypeListParams {