diff --git a/backend/migrations/20251222000000-fix-vehicle-condition-null.cjs b/backend/migrations/20251222000000-fix-vehicle-condition-null.cjs
new file mode 100644
index 0000000..76c79f8
--- /dev/null
+++ b/backend/migrations/20251222000000-fix-vehicle-condition-null.cjs
@@ -0,0 +1,60 @@
+/* eslint-disable */
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    // Ensure column exists
+    await queryInterface.sequelize.query(`
+      ALTER TABLE falukant_data.vehicle
+      ADD COLUMN IF NOT EXISTS condition integer;
+    `);
+
+    // Backfill nulls (legacy data)
+    await queryInterface.sequelize.query(`
+      UPDATE falukant_data.vehicle
+      SET condition = 100
+      WHERE condition IS NULL;
+    `);
+
+    // Clamp out-of-range values defensively
+    await queryInterface.sequelize.query(`
+      UPDATE falukant_data.vehicle
+      SET condition = GREATEST(0, LEAST(100, condition))
+      WHERE condition < 0 OR condition > 100;
+    `);
+
+    // Default + NOT NULL
+    await queryInterface.sequelize.query(`
+      ALTER TABLE falukant_data.vehicle
+      ALTER COLUMN condition SET DEFAULT 100;
+    `);
+    await queryInterface.sequelize.query(`
+      ALTER TABLE falukant_data.vehicle
+      ALTER COLUMN condition SET NOT NULL;
+    `);
+
+    // Check constraint 0..100
+    await queryInterface.sequelize.query(`
+      ALTER TABLE falukant_data.vehicle
+      DROP CONSTRAINT IF EXISTS vehicle_condition_0_100_chk;
+    `);
+    await queryInterface.sequelize.query(`
+      ALTER TABLE falukant_data.vehicle
+      ADD CONSTRAINT vehicle_condition_0_100_chk
+      CHECK (condition >= 0 AND condition <= 100);
+    `);
+  },
+
+  async down(queryInterface, Sequelize) {
+    // Keep the column, but remove constraint/default to be reversible
+    await queryInterface.sequelize.query(`
+      ALTER TABLE falukant_data.vehicle
+      DROP CONSTRAINT IF EXISTS vehicle_condition_0_100_chk;
+    `);
+    await queryInterface.sequelize.query(`
+      ALTER TABLE falukant_data.vehicle
+      ALTER COLUMN condition DROP DEFAULT;
+    `);
+    // NOT NULL not reverted to avoid introducing NULLs on rollback; can be adjusted if needed
+  },
+};
+
+
diff --git a/backend/services/falukantService.js b/backend/services/falukantService.js
index a2edcac..674d2d6 100644
--- a/backend/services/falukantService.js
+++ b/backend/services/falukantService.js
@@ -922,7 +922,8 @@ class FalukantService extends BaseService {
 
             return {
                 id: plain.id,
-                condition: plain.condition,
+                // Defensive: legacy DB rows can have NULL -> UI would display "Unbekannt"
+                condition: Math.max(0, Math.min(100, Number.isFinite(Number(plain.condition)) ? Number(plain.condition) : 100)),
                 availableFrom: plain.availableFrom,
                 status,
                 type: {
diff --git a/backend/utils/syncDatabase.js b/backend/utils/syncDatabase.js
index f55991f..036fd0c 100644
--- a/backend/utils/syncDatabase.js
+++ b/backend/utils/syncDatabase.js
@@ -395,7 +395,27 @@ const syncDatabaseForDeployment = async () => {
                 console.log(`✅ ${deletedCount8} verwaiste political_office Einträge entfernt`);
             }
 
-            if (deletedCount1 === 0 && deletedCount2 === 0 && deletedCount3 === 0 && deletedCount4 === 0 && deletedCount5 === 0 && deletedCount6 === 0 && deletedCount7 === 0 && deletedCount8 === 0) {
+            // Cleanup vehicle.condition: Legacy-Nulls + Range clamp (UI zeigt sonst "Unbekannt")
+            const result9 = await sequelize.query(`
+                UPDATE falukant_data.vehicle
+                SET condition = 100
+                WHERE condition IS NULL;
+            `);
+            const updatedNullConditions = result9[1] || 0;
+            if (updatedNullConditions > 0) {
+                console.log(`✅ ${updatedNullConditions} vehicle.condition NULL → 100 gesetzt`);
+            }
+            const result10 = await sequelize.query(`
+                UPDATE falukant_data.vehicle
+                SET condition = GREATEST(0, LEAST(100, condition))
+                WHERE condition < 0 OR condition > 100;
+            `);
+            const clampedConditions = result10[1] || 0;
+            if (clampedConditions > 0) {
+                console.log(`✅ ${clampedConditions} vehicle.condition Werte auf 0..100 geklemmt`);
+            }
+
+            if (deletedCount1 === 0 && deletedCount2 === 0 && deletedCount3 === 0 && deletedCount4 === 0 && deletedCount5 === 0 && deletedCount6 === 0 && deletedCount7 === 0 && deletedCount8 === 0 && updatedNullConditions === 0 && clampedConditions === 0) {
                 console.log("✅ Keine verwaisten Einträge gefunden");
             }
         } catch (e) {