diff --git a/src/claim-request-management/claim-request-management.service.ts b/src/claim-request-management/claim-request-management.service.ts
index 8ce7071..bbe8aeb 100644
--- a/src/claim-request-management/claim-request-management.service.ts
+++ b/src/claim-request-management/claim-request-management.service.ts
@@ -87,8 +87,12 @@ import {
 import {
   canonicalizeClaimCarAngleKey,
   getClaimCarAngleCaptureBlob,
+  getDamagedPartCaptureBlob,
   hasClaimCarAngleCapture,
+  hasDamagedPartCapture,
   legacyAngleDamagedPartFieldKeysToUnset,
+  legacyDamagedPartTitleEnFromPartKey,
+  resolveCanonicalDamagedPartStorageKey,
   type ClaimCarAngleKey,
 } from "src/helpers/claim-car-angle-media";
 import {
@@ -4358,7 +4362,10 @@ export class ClaimRequestManagementService {
           side,
           label_fa: sideFa ? `${label.fa} (${sideFa})` : label.fa,
           label_en: label.en,
-          captured: !!hasCapture(claimCase.media?.damagedParts as any, partKey),
+          captured: hasDamagedPartCapture(
+            claimCase.media?.damagedParts as any,
+            partKey,
+          ),
         };
       });
 
@@ -4809,7 +4816,25 @@ export class ClaimRequestManagementService {
           }
         }
       } else {
-        updateData[`media.damagedParts.${body.captureKey}`] = captureData;
+        const canonicalPartKey = resolveCanonicalDamagedPartStorageKey(
+          body.captureKey,
+          selectedBefore,
+        );
+        updateData[`media.damagedParts.${canonicalPartKey}`] = captureData;
+        const raw = String(body.captureKey ?? "").trim();
+        const titleLegacy =
+          legacyDamagedPartTitleEnFromPartKey(canonicalPartKey);
+        const unsetPartKeys = new Set<string>();
+        if (raw && raw !== canonicalPartKey) unsetPartKeys.add(raw);
+        if (titleLegacy && titleLegacy !== canonicalPartKey) {
+          unsetPartKeys.add(titleLegacy);
+        }
+        if (unsetPartKeys.size) {
+          updateData.$unset = updateData.$unset || {};
+          for (const k of unsetPartKeys) {
+            updateData.$unset[`media.damagedParts.${k}`] = "";
+          }
+        }
       }
 
       if (
@@ -4864,7 +4889,9 @@ export class ClaimRequestManagementService {
           k as ClaimCarAngleKey,
         ),
       ).length;
-      const partsCaptured = selectedParts.filter(p => hasCapture(damagedPartsData, p)).length;
+      const partsCaptured = selectedParts.filter((p) =>
+        hasDamagedPartCapture(damagedPartsData, p),
+      ).length;
 
       const allCapturesComplete =
         anglesCaptured >= 4 && partsCaptured >= selectedParts.length;
@@ -5515,7 +5542,9 @@ export class ClaimRequestManagementService {
         ...resendPartKeys,
       ]);
       for (const p of partKeysForDetails) {
-        const cap = hasCapture(damagedPartsData, p);
+        const cap = getDamagedPartCaptureBlob(damagedPartsData, p) as
+          | { url?: string; path?: string }
+          | undefined;
         damagedParts[p] = {
           label_fa: getPartLabelFa(p),
           captured: !!cap,
diff --git a/src/expert-claim/expert-claim.service.ts b/src/expert-claim/expert-claim.service.ts
index d1e39d7..1299000 100644
--- a/src/expert-claim/expert-claim.service.ts
+++ b/src/expert-claim/expert-claim.service.ts
@@ -67,6 +67,7 @@ import {
 import { resendRequestHasPayload } from "src/helpers/claim-expert-resend";
 import {
   getClaimCarAngleCaptureBlob,
+  getDamagedPartCaptureBlob,
   type ClaimCarAngleKey,
 } from "src/helpers/claim-car-angle-media";
 import { snapshotFromDamageExpert } from "src/helpers/expert-profile-snapshot";
@@ -3306,7 +3307,9 @@ export class ExpertClaimService {
       { label_fa: string; captured: boolean; url?: string }
     > = {};
     for (const p of claim.damage?.selectedParts || []) {
-      const cap = hasCapture(damagedPartsData, p);
+      const cap = getDamagedPartCaptureBlob(damagedPartsData, p) as
+        | { url?: string; path?: string }
+        | undefined;
       damagedParts[p] = {
         label_fa: getPartLabelFa(p),
         captured: !!cap,
diff --git a/src/helpers/claim-car-angle-media.ts b/src/helpers/claim-car-angle-media.ts
index 3eb3145..de79122 100644
--- a/src/helpers/claim-car-angle-media.ts
+++ b/src/helpers/claim-car-angle-media.ts
@@ -72,3 +72,71 @@ export function legacyAngleDamagedPartFieldKeysToUnset(
   }
   return [...new Set(out)];
 }
+
+/** Same English title derived from snake_case keys as capture-requirements UI (legacy client storage). */
+export function legacyDamagedPartTitleEnFromPartKey(partKey: string): string {
+  return String(partKey)
+    .replace(/([a-z])([A-Z])/g, "$1 $2")
+    .replace(/_/g, " ")
+    .trim()
+    .replace(/\b\w/g, (c) => c.toUpperCase());
+}
+
+function normalizeDamagedPartKeyLoose(s: string): string {
+  return String(s).toLowerCase().replace(/[\s_-]/g, "");
+}
+
+export function getDamagedPartCaptureBlob(
+  damagedPartsData: unknown,
+  partKey: string,
+): unknown {
+  const pk = String(partKey ?? "").trim();
+  if (!pk || damagedPartsData == null) return undefined;
+  let b = getCaptureBlob(damagedPartsData, pk);
+  if (b) return b;
+  const titleEn = legacyDamagedPartTitleEnFromPartKey(pk);
+  if (titleEn !== pk) {
+    b = getCaptureBlob(damagedPartsData, titleEn);
+    if (b) return b;
+  }
+  const target = normalizeDamagedPartKeyLoose(pk);
+  const keys =
+    damagedPartsData instanceof Map
+      ? Array.from((damagedPartsData as Map<string, unknown>).keys())
+      : Object.keys(damagedPartsData as Record<string, unknown>);
+  for (const k of keys) {
+    if (normalizeDamagedPartKeyLoose(k) === target) {
+      b = getCaptureBlob(damagedPartsData, k);
+      if (b) return b;
+    }
+  }
+  return undefined;
+}
+
+/**
+ * True if a capture exists for catalog/selected part key {@code partKey}, including blobs stored
+ * under humanized keys (e.g. {@code Left Backfender} vs {@code left_backfender}).
+ */
+export function hasDamagedPartCapture(
+  damagedPartsData: unknown,
+  partKey: string,
+): boolean {
+  return getDamagedPartCaptureBlob(damagedPartsData, partKey) != null;
+}
+
+/**
+ * Map a client {@code captureKey} to the canonical {@code damage.selectedParts} id when unambiguous.
+ */
+export function resolveCanonicalDamagedPartStorageKey(
+  captureKeyRaw: string,
+  selectedParts: string[],
+): string {
+  const raw = String(captureKeyRaw ?? "").trim();
+  if (!raw) return raw;
+  const parts = (selectedParts ?? []).map((p) => String(p).trim()).filter(Boolean);
+  if (parts.includes(raw)) return raw;
+  const n = normalizeDamagedPartKeyLoose(raw);
+  const matches = parts.filter((p) => normalizeDamagedPartKeyLoose(p) === n);
+  if (matches.length === 1) return matches[0];
+  return raw;
+}