diff --git a/apps/api/src/integrations/pl24/__fixtures__/p5_volvo_en.json b/apps/api/src/integrations/pl24/__fixtures__/p5_volvo_en.json
new file mode 100644
index 0000000..08538d7
--- /dev/null
+++ b/apps/api/src/integrations/pl24/__fixtures__/p5_volvo_en.json
@@ -0,0 +1,198 @@
+{
+  "link": {
+    "wid": "mainGroupTable",
+    "path": "/p5volvo/extern/groups/vin/mainGroup?lang=en&model=308&modelYear=1620&partnerGroup=46&serviceName=volvo_parts&upds=2026-08-24--11-02&vin=YV1AS84ABD1168166"
+  },
+  "segments": {
+    "vinfoBasic": {
+      "records": [
+        {
+          "values": {
+            "description": "Vehicle Identification No.",
+            "value": "YV1AS84ABD1168166"
+          }
+        },
+        {
+          "values": {
+            "description": "Year",
+            "value": "2013"
+          }
+        },
+        {
+          "values": {
+            "description": "Model",
+            "value": "S80 (07\\-)"
+          }
+        },
+        {
+          "values": {
+            "description": "Km/h or mph",
+            "value": "K"
+          }
+        },
+        {
+          "values": {
+            "description": "Factory code",
+            "value": "21"
+          }
+        },
+        {
+          "values": {
+            "description": "Steering gear prod no",
+            "value": "31360538"
+          }
+        },
+        {
+          "values": {
+            "description": "Structure week",
+            "value": "201236"
+          }
+        },
+        {
+          "values": {
+            "description": "Type",
+            "value": "S80"
+          }
+        },
+        {
+          "values": {
+            "description": "Chassis",
+            "value": "168166"
+          }
+        },
+        {
+          "values": {
+            "description": "Partner group",
+            "value": "Europe"
+          }
+        },
+        {
+          "values": {
+            "description": "Upholstery/interior code",
+            "value": "210100"
+          }
+        },
+        {
+          "values": {
+            "description": "Upholstery/interior",
+            "value": "LEATHER/ANTHR/QRTZCEIL/NV"
+          }
+        },
+        {
+          "values": {
+            "description": "Exterior color",
+            "value": "61400"
+          }
+        },
+        {
+          "values": {
+            "description": "Exterior color",
+            "value": "WHITE SOLID     ICE WHITE"
+          }
+        },
+        {
+          "values": {
+            "description": "Body style code",
+            "value": "0"
+          }
+        },
+        {
+          "values": {
+            "description": "Body style",
+            "value": "Sedan"
+          }
+        },
+        {
+          "values": {
+            "description": "Special vehicle code",
+            "value": " "
+          }
+        },
+        {
+          "values": {
+            "description": "Special vehicles",
+            "value": " "
+          }
+        },
+        {
+          "values": {
+            "description": "Sales type",
+            "value": "42"
+          }
+        },
+        {
+          "values": {
+            "description": "Sales type",
+            "value": "SALES VERSION 42"
+          }
+        },
+        {
+          "values": {
+            "description": "Market code",
+            "value": "49"
+          }
+        },
+        {
+          "values": {
+            "description": "Market",
+            "value": "TR"
+          }
+        },
+        {
+          "values": {
+            "description": "Engine Code",
+            "value": "84"
+          }
+        },
+        {
+          "values": {
+            "description": "Engine",
+            "value": "D4162T"
+          }
+        },
+        {
+          "values": {
+            "description": "Engine part no",
+            "value": "6906309"
+          }
+        },
+        {
+          "values": {
+            "description": "Engine serial no",
+            "value": "00000000000004138845 / 0ELD61 2208122233587"
+          }
+        },
+        {
+          "values": {
+            "description": "Transmission Code",
+            "value": "B"
+          }
+        },
+        {
+          "values": {
+            "description": "Transmission",
+            "value": "6\\-PSHIFT 2WD / MPS6"
+          }
+        },
+        {
+          "values": {
+            "description": "Transmission part no",
+            "value": "1285041"
+          }
+        },
+        {
+          "values": {
+            "description": "Transmission serial no",
+            "value": "00AWBB1 170812170654"
+          }
+        },
+        {
+          "values": {
+            "description": "Chassis code",
+            "value": "35659B7A6276"
+          }
+        }
+      ]
+    }
+  }
+}
diff --git a/apps/api/src/integrations/pl24/__fixtures__/p5_volvo_tr.json b/apps/api/src/integrations/pl24/__fixtures__/p5_volvo_tr.json
new file mode 100644
index 0000000..5221916
--- /dev/null
+++ b/apps/api/src/integrations/pl24/__fixtures__/p5_volvo_tr.json
@@ -0,0 +1,198 @@
+{
+  "link": {
+    "wid": "mainGroupTable",
+    "path": "/p5volvo/extern/groups/vin/mainGroup?lang=tr&model=308&modelYear=1620&partnerGroup=46&serviceName=volvo_parts&upds=2026-08-24--11-02&vin=YV1AS84ABD1168166"
+  },
+  "segments": {
+    "vinfoBasic": {
+      "records": [
+        {
+          "values": {
+            "description": "Sasi numarasi",
+            "value": "YV1AS84ABD1168166"
+          }
+        },
+        {
+          "values": {
+            "description": "Model yili",
+            "value": "2013"
+          }
+        },
+        {
+          "values": {
+            "description": "Model",
+            "value": "S80 (07\\-)"
+          }
+        },
+        {
+          "values": {
+            "description": "Hız Birimi",
+            "value": "K"
+          }
+        },
+        {
+          "values": {
+            "description": "Fabrika Kodu",
+            "value": "21"
+          }
+        },
+        {
+          "values": {
+            "description": "Direksiyon Kutusu Üretim No",
+            "value": "31360538"
+          }
+        },
+        {
+          "values": {
+            "description": "Üretim Haftası",
+            "value": "201236"
+          }
+        },
+        {
+          "values": {
+            "description": "Türü",
+            "value": "S80"
+          }
+        },
+        {
+          "values": {
+            "description": "Şasi",
+            "value": "168166"
+          }
+        },
+        {
+          "values": {
+            "description": "Ortak grubu",
+            "value": "Europe"
+          }
+        },
+        {
+          "values": {
+            "description": "Döşeme/iç mekan kodu",
+            "value": "210100"
+          }
+        },
+        {
+          "values": {
+            "description": "Döşeme",
+            "value": "LEATHER/ANTHR/QRTZCEIL/NV"
+          }
+        },
+        {
+          "values": {
+            "description": "Dis rengi",
+            "value": "61400"
+          }
+        },
+        {
+          "values": {
+            "description": "Dis rengi",
+            "value": "WHITE SOLID     ICE WHITE"
+          }
+        },
+        {
+          "values": {
+            "description": "Karoseri Tipi Kodu",
+            "value": "0"
+          }
+        },
+        {
+          "values": {
+            "description": "Kaporta Stili",
+            "value": "Sedan"
+          }
+        },
+        {
+          "values": {
+            "description": "Özel Araç Kodu",
+            "value": " "
+          }
+        },
+        {
+          "values": {
+            "description": "Özel araçlar",
+            "value": " "
+          }
+        },
+        {
+          "values": {
+            "description": "Satis tipi",
+            "value": "42"
+          }
+        },
+        {
+          "values": {
+            "description": "Satis tipi",
+            "value": "SALES VERSION 42"
+          }
+        },
+        {
+          "values": {
+            "description": "Piyasa Kodu",
+            "value": "49"
+          }
+        },
+        {
+          "values": {
+            "description": "Market",
+            "value": "TR"
+          }
+        },
+        {
+          "values": {
+            "description": "Motor kodu",
+            "value": "84"
+          }
+        },
+        {
+          "values": {
+            "description": "Motor",
+            "value": "D4162T"
+          }
+        },
+        {
+          "values": {
+            "description": "Motor Parça No",
+            "value": "6906309"
+          }
+        },
+        {
+          "values": {
+            "description": "Motor Seri Numarası",
+            "value": "00000000000004138845 / 0ELD61 2208122233587"
+          }
+        },
+        {
+          "values": {
+            "description": "Şanzıman kodu",
+            "value": "B"
+          }
+        },
+        {
+          "values": {
+            "description": "Şanzıman",
+            "value": "6\\-PSHIFT 2WD / MPS6"
+          }
+        },
+        {
+          "values": {
+            "description": "Şanzıman Parça No",
+            "value": "1285041"
+          }
+        },
+        {
+          "values": {
+            "description": "Şanzıman Seri No",
+            "value": "00AWBB1 170812170654"
+          }
+        },
+        {
+          "values": {
+            "description": "Şasi Kodu",
+            "value": "35659B7A6276"
+          }
+        }
+      ]
+    }
+  }
+}
diff --git a/apps/api/src/integrations/pl24/pl24-volvo-vinfo.spec.ts b/apps/api/src/integrations/pl24/pl24-volvo-vinfo.spec.ts
new file mode 100644
index 0000000..9f577df
--- /dev/null
+++ b/apps/api/src/integrations/pl24/pl24-volvo-vinfo.spec.ts
@@ -0,0 +1,68 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { describe, expect, it } from "vitest";
+import { PL24Service } from "./pl24.service";
+
+/**
+ * Volvo P5 vinfoBasic regression lock (plv2.md, finding p5core-09).
+ *
+ * Volvo emits BOTH a bare internal code and a readable description for the same
+ * attribute — "Şanzıman kodu" = "B" next to "Şanzıman" = "6-PSHIFT 2WD / MPS6",
+ * and "Satis tipi" = "42" next to "Türü" = "S80". The key order the parser needs
+ * for VAG (whose "Şanzıman kodu" IS the useful value, e.g. "MQ200") therefore
+ * rendered a single letter as the gearbox and a bare number as the series.
+ *
+ * Fixtures are the real 2026-09-16 discovery captures for VIN
+ * YV1AS84ABD1168166 (S80), trimmed to the segments the parser reads, in both
+ * the Turkish and the English label locale.
+ */
+
+const fixture = (name: string) =>
+  JSON.parse(readFileSync(join(__dirname, "__fixtures__", `${name}.json`), "utf-8"));
+
+// parseVehicleResponse only touches the response and the service name.
+const parse = (data: unknown, serviceName = "volvo_parts") => {
+  const svc = Object.create(PL24Service.prototype) as unknown as {
+    parseVehicleResponse: (v: string, d: unknown, s: string) => Record<string, unknown>;
+    isDaimlerService: (s: string) => boolean;
+  };
+  svc.isDaimlerService = () => false;
+  return svc.parseVehicleResponse("YV1AS84ABD1168166", data, serviceName);
+};
+
+describe("Volvo P5 vinfoBasic — kod yerine açıklama", () => {
+  it("Türkçe etiketlerde şanzımanı okunur değerinden alır", () => {
+    const out = parse(fixture("p5_volvo_tr"));
+    expect(out.transmission).toBe("6-PSHIFT 2WD / MPS6");
+    // Tek harflik "Şanzıman kodu" artık kazanmıyor.
+    expect(out.transmission).not.toBe("B");
+  });
+
+  it("İngilizce etiketlerde de aynı sonucu verir", () => {
+    const out = parse(fixture("p5_volvo_en"));
+    expect(out.transmission).toBe("6-PSHIFT 2WD / MPS6");
+  });
+
+  it("seri, çıplak satış kodu yerine gerçek tipi döner", () => {
+    expect(parse(fixture("p5_volvo_tr")).series).toBe("S80");
+    expect(parse(fixture("p5_volvo_en")).series).toBe("S80");
+    expect(parse(fixture("p5_volvo_tr")).series).not.toBe("42");
+  });
+
+  it("kaporta stili iki dilde de çözülür ve '0' kodu sızmaz", () => {
+    expect(parse(fixture("p5_volvo_tr")).bodyType).toBe("Sedan");
+    expect(parse(fixture("p5_volvo_en")).bodyType).toBe("Sedan");
+  });
+
+  it("motor alanları bozulmadan kalır", () => {
+    const out = parse(fixture("p5_volvo_tr"));
+    expect(out.engineCode).toBe("84");
+    expect(out.engineType).toBe("D4162T");
+  });
+
+  it("model ve yıl korunur", () => {
+    const out = parse(fixture("p5_volvo_tr"));
+    expect(out.model).toBe("S80 (07-)");
+    expect(out.year).toBe(2013);
+  });
+});
diff --git a/apps/api/src/integrations/pl24/pl24.service.ts b/apps/api/src/integrations/pl24/pl24.service.ts
index 24e4f06..3bf511d 100644
--- a/apps/api/src/integrations/pl24/pl24.service.ts
+++ b/apps/api/src/integrations/pl24/pl24.service.ts
@@ -1184,6 +1184,31 @@ export class PL24Service {
       return null;
     };
 
+    /**
+     * Like `lookup`, but prefers a human-readable value over a bare internal
+     * code when the record carries both.
+     *
+     * Volvo's vinfoBasic has BOTH "Şanzıman kodu" ("B") and "Şanzıman"
+     * ("6-PSHIFT 2WD / MPS6"), and BOTH "Satis tipi" ("42") and a second
+     * "Satis tipi" ("SALES VERSION 42"). The code-first key order that VAG needs
+     * (its "Şanzıman kodu" IS the useful value, e.g. "MQ200") therefore rendered
+     * a single letter as the Volvo gearbox and a bare number as its series.
+     *
+     * Falls back to the first present value, so a backend that only ever emits
+     * codes behaves exactly as before.
+     */
+    const lookupDescriptive = (...keys: string[]): string | null => {
+      let firstPresent: string | null = null;
+      for (const k of keys) {
+        const v = vehicleData[k]?.trim();
+        if (!v) continue;
+        if (firstPresent === null) firstPresent = v;
+        // Two characters or fewer, or digits only → an index, not a description.
+        if (v.length > 2 && !/^\d+$/.test(v)) return v;
+      }
+      return firstPresent;
+    };
+
     // Extract prNr records for richer vehicle attributes
     const prNrRecords = segments.prNr?.records || [];
     const prNrByCode: Record<string, string> = {};
@@ -1226,13 +1251,17 @@ export class PL24Service {
     // normalizeLabel folds ı→i and strips diacritics, so "Şanzıman kodu" and
     // "ŞANZIMAN KODU" both arrive as "sanziman_kodu". PSA uses "AKTARMA
     // SİSTEMLERİ" ("5 MEKANİK VİTES KUTUSU"), Subaru "Mission".
-    const transmissionCode = lookup(
+    const transmissionCode = lookupDescriptive(
       "sanziman_kodu",
       "transmission_code",
       "vites_kutusu",
       "atm,mtm",
       "aktarma_sistemleri",
       "sanziman",
+      // Volvo in the English locale: "Transmission code" ("B") plus the readable
+      // "Transmission" ("6-PSHIFT 2WD / MPS6"). Without the plain key the
+      // English response falls back to the single-letter code.
+      "transmission",
       "sanziman_numarasi",
       "mission",
     );
@@ -1242,7 +1271,10 @@ export class PL24Service {
     const bodyType =
       Object.entries(prNrByCode).find(([code]) => code.startsWith("K8"))?.[1] ||
       // PSA "GÖVDE TİPİ" ("4 KAPILI SEDAN"), Volvo "Kaporta Stili" ("Sedan").
-      lookup("karoseri", "body", "body_type", "govde_tipi", "kaporta_stili") ||
+      // Volvo: TR "Kaporta Stili" / EN "Body style" ("Sedan"). Its
+      // "Karoseri Tipi Kodu" / "Body style code" is a bare "0" — never matched
+      // here because the lookup is exact-key, and that is deliberate.
+      lookup("karoseri", "body", "body_type", "govde_tipi", "kaporta_stili", "body_style") ||
       null;
 
     // Engine description from prNr D3* (Motor nitelikleri)
@@ -1301,7 +1333,10 @@ export class PL24Service {
         damToModelYear(lookup("dam")) ||
         extractModelYear(vin) ||
         0,
-      series: lookup("seri", "satis_tipi", "sales_type", "turu"),
+      // Volvo's "Satis tipi" is the bare sales code ("42") with the readable
+      // form ("SALES VERSION 42") in a duplicate row, and its "Türü" is the real
+      // series ("S80") — so prefer whichever of these is actually descriptive.
+      series: lookupDescriptive("seri", "satis_tipi", "sales_type", "turu", "type"),
       bodyType,
       engineCode:
         engineCode ||