diff --git a/pos/services/catalog_service.py b/pos/services/catalog_service.py
index b5ed534..8a065e3 100644
--- a/pos/services/catalog_service.py
+++ b/pos/services/catalog_service.py
@@ -18,23 +18,13 @@ import re
 # ─────────────────────────────────────────────────────────────────────────────
 
 def get_brands(master_conn):
-    """Get all vehicle brands that have at least one part in the catalog.
-
-    Uses EXISTS on model_year_engine + vehicle_parts to avoid scanning
-    vehicle_parts fully. The subquery stops at the first match per brand.
-    """
+    """Get all vehicle brands that have MYE entries (fast, no vehicle_parts scan)."""
     cur = master_conn.cursor()
     cur.execute("""
         SELECT DISTINCT b.id_brand, b.name_brand
         FROM brands b
-        WHERE EXISTS (
-            SELECT 1
-            FROM models m
-            JOIN model_year_engine mye ON mye.model_id = m.id_model
-            JOIN vehicle_parts vp ON vp.model_year_engine_id = mye.id_mye
-            WHERE m.brand_id = b.id_brand
-            LIMIT 1
-        )
+        JOIN models m ON m.brand_id = b.id_brand
+        JOIN model_year_engine mye ON mye.model_id = m.id_model
         ORDER BY b.name_brand
     """)
     rows = cur.fetchall()
@@ -43,19 +33,13 @@ def get_brands(master_conn):
 
 
 def get_models(master_conn, brand_id):
-    """Get models for a brand that have at least one MYE with parts."""
+    """Get models for a brand that have MYE entries (fast, no vehicle_parts scan)."""
     cur = master_conn.cursor()
     cur.execute("""
         SELECT DISTINCT m.id_model, m.name_model
         FROM models m
+        JOIN model_year_engine mye ON mye.model_id = m.id_model
         WHERE m.brand_id = %s
-          AND EXISTS (
-              SELECT 1
-              FROM model_year_engine mye
-              JOIN vehicle_parts vp ON vp.model_year_engine_id = mye.id_mye
-              WHERE mye.model_id = m.id_model
-              LIMIT 1
-          )
         ORDER BY m.name_model
     """, (brand_id,))
     rows = cur.fetchall()
@@ -64,19 +48,13 @@ def get_models(master_conn, brand_id):
 
 
 def get_years(master_conn, model_id):
-    """Get distinct years for a model (via MYE) that have parts. Ordered DESC."""
+    """Get distinct years for a model via MYE (fast, no vehicle_parts scan). Ordered DESC."""
     cur = master_conn.cursor()
     cur.execute("""
         SELECT DISTINCT y.id_year, y.year_car
         FROM years y
         JOIN model_year_engine mye ON mye.year_id = y.id_year
         WHERE mye.model_id = %s
-          AND EXISTS (
-              SELECT 1
-              FROM vehicle_parts vp
-              WHERE vp.model_year_engine_id = mye.id_mye
-              LIMIT 1
-          )
         ORDER BY y.year_car DESC
     """, (model_id,))
     rows = cur.fetchall()
@@ -85,19 +63,13 @@ def get_years(master_conn, model_id):
 
 
 def get_engines(master_conn, model_id, year_id):
-    """Get MYE entries (engine + trim) for a model+year combo that have parts."""
+    """Get MYE entries (engine + trim) for a model+year combo."""
     cur = master_conn.cursor()
     cur.execute("""
         SELECT mye.id_mye, e.name_engine, mye.trim_level
         FROM model_year_engine mye
         JOIN engines e ON e.id_engine = mye.engine_id
         WHERE mye.model_id = %s AND mye.year_id = %s
-          AND EXISTS (
-              SELECT 1
-              FROM vehicle_parts vp
-              WHERE vp.model_year_engine_id = mye.id_mye
-              LIMIT 1
-          )
         ORDER BY e.name_engine, mye.trim_level
     """, (model_id, year_id))
     rows = cur.fetchall()