diff --git a/apps/api/src/integrations/pl24/pl24-model-path.spec.ts b/apps/api/src/integrations/pl24/pl24-model-path.spec.ts
new file mode 100644
index 0000000..ba6901d
--- /dev/null
+++ b/apps/api/src/integrations/pl24/pl24-model-path.spec.ts
@@ -0,0 +1,127 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { PL24Service } from "./pl24.service";
+
+/**
+ * Model-list entry point resolution (plv2.md, bulgu p5core-08).
+ *
+ * `BACKEND_MODEL_PATH` eksik kaldığında eski davranış yedi bilinen yolu sırayla
+ * denemekti: paylaşılan günlük bütçeden çağrı başına yedi isteğe kadar, ve
+ * listede olmayan bir yol için sessiz sıfır sonuç. Volvo tam olarak buydu —
+ * `/extern/vehicles/models` (çoğul "vehicles") listede yok, dolayısıyla
+ * Volvo/Polestar browse sıfır model tohumlayıp emekli P4 listesini sunmaya
+ * devam ediyordu.
+ *
+ * Otoritatif kaynak her P5 backend'inin kendi `/extern/catmeta` yanıtındaki
+ * `data.catalogEntryPoint.path`. Canlı doğrulama (2026-09-20):
+ *   p5volvo → /p5volvo/extern/vehicles/models  (60 model)
+ *   p5psa   → /p5psa/extern/vehicle/catalogs
+ */
+
+type Resolver = {
+  resolveModelPathFromCatmeta: (
+    base: string,
+    svc: string,
+    headers: Record<string, string>,
+  ) => Promise<string | null>;
+  baseUrl: string;
+  language: string;
+  redis: {
+    get: (k: string) => Promise<string | null>;
+    set: (k: string, v: string, ttl?: number) => Promise<unknown>;
+  };
+  logger: { log: (m: string) => void; warn: (m: string) => void };
+};
+
+function makeService(opts: {
+  cached?: string | null;
+  catmeta?: unknown;
+  status?: number;
+  throws?: boolean;
+}) {
+  const sets: Array<[string, string]> = [];
+  const svc = Object.create(PL24Service.prototype) as unknown as Resolver;
+  svc.baseUrl = "https://pl24.test";
+  svc.language = "tr";
+  svc.redis = {
+    get: vi.fn(async () => opts.cached ?? null),
+    set: vi.fn(async (k: string, v: string) => {
+      sets.push([k, v]);
+      return undefined;
+    }),
+  };
+  svc.logger = { log: vi.fn(), warn: vi.fn() };
+  const fetchMock = vi.fn(async () => {
+    if (opts.throws) throw new Error("network down");
+    return {
+      ok: (opts.status ?? 200) < 400,
+      status: opts.status ?? 200,
+      json: async () => opts.catmeta ?? {},
+    };
+  });
+  vi.stubGlobal("fetch", fetchMock);
+  return { svc, sets, fetchMock };
+}
+
+const volvoMeta = {
+  data: {
+    catalogEntryPoint: {
+      wid: "modelsTable",
+      path: "/p5volvo/extern/vehicles/models?lang=en&serviceName=volvo_parts",
+    },
+  },
+};
+
+describe("resolveModelPathFromCatmeta", () => {
+  beforeEach(() => vi.unstubAllGlobals());
+
+  it("catmeta'daki giriş noktasını backend'e göreli yola indirger", async () => {
+    const { svc } = makeService({ catmeta: volvoMeta });
+    const out = await svc.resolveModelPathFromCatmeta("/p5volvo", "volvo_parts", {});
+    expect(out).toBe("/extern/vehicles/models");
+  });
+
+  it("çözülen yolu 30 gün cache'ler", async () => {
+    const { svc, sets } = makeService({ catmeta: volvoMeta });
+    await svc.resolveModelPathFromCatmeta("/p5volvo", "volvo_parts", {});
+    expect(sets[0][0]).toBe("pl24:modelpath:p5volvo");
+    expect(sets[0][1]).toBe("/extern/vehicles/models");
+  });
+
+  it("cache'lenmiş yol için upstream'e hiç gitmez", async () => {
+    const { svc, fetchMock } = makeService({ cached: "/extern/vehicles/models" });
+    const out = await svc.resolveModelPathFromCatmeta("/p5volvo", "volvo_parts", {});
+    expect(out).toBe("/extern/vehicles/models");
+    expect(fetchMock).not.toHaveBeenCalled();
+  });
+
+  it("olumsuz sonuç da cache'lenir — her browse'da yeniden denenmez", async () => {
+    const { svc, fetchMock } = makeService({ cached: "none" });
+    expect(await svc.resolveModelPathFromCatmeta("/p5x", "x_parts", {})).toBeNull();
+    expect(fetchMock).not.toHaveBeenCalled();
+  });
+
+  it("catmeta yoksa veya şekil beklenmedikse null döner", async () => {
+    const { svc, sets } = makeService({ catmeta: { data: {} } });
+    expect(await svc.resolveModelPathFromCatmeta("/p5x", "x_parts", {})).toBeNull();
+    expect(sets[0][1]).toBe("none");
+  });
+
+  it("HTTP hatasında null döner", async () => {
+    const { svc } = makeService({ status: 403, catmeta: volvoMeta });
+    expect(await svc.resolveModelPathFromCatmeta("/p5volvo", "volvo_parts", {})).toBeNull();
+  });
+
+  it("ağ hatası fırlatmaz", async () => {
+    const { svc } = makeService({ throws: true });
+    await expect(
+      svc.resolveModelPathFromCatmeta("/p5volvo", "volvo_parts", {}),
+    ).resolves.toBeNull();
+  });
+
+  it("/extern/ ile başlamayan yolu kabul etmez", async () => {
+    const { svc } = makeService({
+      catmeta: { data: { catalogEntryPoint: { path: "https://baska.site/kotu" } } },
+    });
+    expect(await svc.resolveModelPathFromCatmeta("/p5volvo", "volvo_parts", {})).toBeNull();
+  });
+});
diff --git a/apps/api/src/integrations/pl24/pl24.service.ts b/apps/api/src/integrations/pl24/pl24.service.ts
index 3bf511d..ca1f545 100644
--- a/apps/api/src/integrations/pl24/pl24.service.ts
+++ b/apps/api/src/integrations/pl24/pl24.service.ts
@@ -1137,6 +1137,78 @@ export class PL24Service {
 
   // ==================== PRIVATE: Response parsers ====================
 
+  /**
+   * Ask a P5 backend where its own model list lives, instead of guessing.
+   *
+   * Every P5 backend serves `/extern/catmeta`, whose `data.catalogEntryPoint.path`
+   * is the authoritative browse entry point — e.g. p5psa answers
+   * `/p5psa/extern/vehicle/catalogs`, p5volvo `/p5volvo/extern/vehicles/models`.
+   * The old behaviour, when `BACKEND_MODEL_PATH` had no entry, was to fire the
+   * seven known paths in turn and keep whichever returned rows. That costs up to
+   * seven upstream requests per call on a shared daily budget, and it silently
+   * fails for any backend whose path is not already on the list — which is how
+   * Volvo/Polestar browse ended up seeding zero models while still serving the
+   * retired P4 listing.
+   *
+   * The resolved path is cached per backend (30 days) so this costs one request
+   * for a backend's whole lifetime, and it self-heals if PL24 moves an endpoint.
+   * Returns null on any failure; the caller then falls back as before.
+   */
+  private async resolveModelPathFromCatmeta(
+    catalogBase: string,
+    serviceName: string,
+    headers: Record<string, string>,
+  ): Promise<string | null> {
+    const cacheKey = `pl24:modelpath:${catalogBase.replace(/^\//, "")}`;
+    try {
+      const cached = await this.redis.get(cacheKey);
+      if (cached) return cached === "none" ? null : cached;
+    } catch {
+      // Redis down — resolve live rather than failing the listing.
+    }
+
+    let resolved: string | null = null;
+    try {
+      const url = `${this.baseUrl}${catalogBase}/extern/catmeta?serviceName=${serviceName}&country=DE&lang=${this.language}`;
+      const res = await fetch(url, { method: "GET", headers, signal: AbortSignal.timeout(15000) });
+      if (res.ok) {
+        const meta = (await res.json()) as {
+          data?: { catalogEntryPoint?: { path?: string } };
+        };
+        const full = meta.data?.catalogEntryPoint?.path;
+        if (full) {
+          // catmeta returns the absolute path with query string
+          // ("/p5volvo/extern/vehicles/models?lang=en&serviceName=…"); the caller
+          // appends its own lang/serviceName, so keep only the backend-relative
+          // path segment.
+          const withoutQuery = full.split("?")[0];
+          const relative = withoutQuery.startsWith(catalogBase)
+            ? withoutQuery.slice(catalogBase.length)
+            : withoutQuery;
+          if (relative.startsWith("/extern/")) resolved = relative;
+        }
+      }
+    } catch (err) {
+      this.logger.warn(
+        `fetchVehicleList: catmeta lookup failed for ${serviceName}: ${(err as Error).message}`,
+      );
+    }
+
+    if (resolved) {
+      this.logger.log(
+        `fetchVehicleList: ${serviceName} model path resolved from catmeta → ${resolved}`,
+      );
+    }
+    try {
+      // Cache the negative too, so a backend without a usable catmeta does not
+      // re-probe on every browse.
+      await this.redis.set(cacheKey, resolved ?? "none", 30 * 86_400);
+    } catch {
+      // best effort
+    }
+    return resolved;
+  }
+
   /**
    * Parse vehicle data from directAccess response.
    */
@@ -2226,11 +2298,22 @@ export class PL24Service {
         p5mitsubishi: "/extern/vehicles/vehiclesOverview", // Mitsubishi
         p5suzuki: "/extern/vehicle/modelFamilies", // Suzuki
         p5man: "/extern/model/categories", // MAN trucks
+        // Pinned 2026-09-20 from each backend's own catmeta `catalogEntryPoint`
+        // (see resolveModelPathFromCatmeta). Before this, p5psa needed five wasted
+        // probe requests to rediscover its path on every call, and p5volvo found
+        // nothing at all — none of the seven guessed paths matches its plural
+        // `/extern/vehicles/models`, so Volvo/Polestar browse silently seeded zero
+        // models and kept serving the dead P4 listing.
+        p5psa: "/extern/vehicle/catalogs", // Peugeot, Citroën, DS, psa_opel, psa_vauxhall
+        p5volvo: "/extern/vehicles/models", // Volvo, Polestar — NOTE: plural "vehicles"
       };
 
       // catalogBase is like "/p5vwag" — strip leading slash for map lookup
       const backendKey = catalogBase.replace(/^\//, "");
-      const modelPath = BACKEND_MODEL_PATH[backendKey] ?? "/extern/vehicle/modelfamilies";
+      const modelPath =
+        BACKEND_MODEL_PATH[backendKey] ??
+        (await this.resolveModelPathFromCatmeta(catalogBase, serviceName, headers)) ??
+        "/extern/vehicle/modelfamilies";
 
       const url = `${this.baseUrl}${catalogBase}${modelPath}?lang=${this.language}&serviceName=${serviceName}`;