diff --git a/modules/translation/translation.module b/modules/translation/translation.module
index 9f3f0c569d47e942b62289e611ab1881694f0314..2b4ab19ef56aa44659e2e533dbe367bb58d1cab5 100644
--- a/modules/translation/translation.module
+++ b/modules/translation/translation.module
@@ -234,9 +234,21 @@ function translation_node_insert($node) {
       else {
         // Create new translation set, using nid from the source node.
         $tnid = $node->translation_source->nid;
-        db_query("UPDATE {node} SET tnid = %d, translate = %d WHERE nid = %d", $tnid, 0, $node->translation_source->nid);
+        db_update('node')
+          ->fields(array(
+            'tnid' => $tnid,
+            'translate' => 0,
+          ))
+          ->condition('nid', $node->translation_source->nid)
+          ->execute();
       }
-      db_query("UPDATE {node} SET tnid = %d, translate = %d WHERE nid = %d", $tnid, 0, $node->nid);
+      db_update('node')
+        ->fields(array(
+          'tnid' => $tnid,
+          'translate' => 0,
+        ))
+        ->condition('nid', $node->nid)
+        ->execute();
     }
   }
 }
@@ -249,10 +261,20 @@ function translation_node_update($node) {
   if (translation_supported_type($node->type)) {
     if (isset($node->translation) && $node->translation && !empty($node->language) && $node->tnid) {
       // Update translation information.
-      db_query("UPDATE {node} SET tnid = %d, translate = %d WHERE nid = %d", $node->tnid, $node->translation['status'], $node->nid);
+      db_update('node')
+        ->fields(array(
+          'tnid' => $node->tnid,
+          'translate' => $node->translation['status'],
+        ))
+        ->condition('nid', $node->nid)
+        ->execute();
       if (!empty($node->translation['retranslate'])) {
         // This is the source node, asking to mark all translations outdated.
-        db_query("UPDATE {node} SET translate = 1 WHERE tnid = %d AND nid <> %d", $node->tnid, $node->nid);
+        db_update('node')
+          ->fields(array('translate' => 1))
+          ->condition('nid', $node->nid, '<>')
+          ->condition('tnid', $node->tnid)
+          ->execute();
       }
     }
   }
@@ -290,18 +312,30 @@ function translation_node_delete($node) {
  */
 function translation_remove_from_set($node) {
   if (isset($node->tnid)) {
-    if (db_result(db_query('SELECT COUNT(*) FROM {node} WHERE tnid = %d', $node->tnid)) == 1) {
+    $query = db_update('node')
+      ->fields(array(
+        'tnid' => 0,
+        'translate' => 0,
+      ));
+    if (db_query('SELECT COUNT(*) FROM {node} WHERE tnid = :tnid', array(':tnid' => $node->tnid))->fetchField() == 1) {
       // There is only one node left in the set: remove the set altogether.
-      db_query('UPDATE {node} SET tnid = 0, translate = 0 WHERE tnid = %d', $node->tnid);
+      $query
+        ->condition('tnid', $node->tnid)
+        ->execute();
     }
     else {
-      db_query('UPDATE {node} SET tnid = 0, translate = 0 WHERE nid = %d', $node->nid);
+      $query
+        ->condition('nid', $node->nid)
+        ->execute();
 
       // If the node being removed was the source of the translation set,
       // we pick a new source - preferably one that is up to date.
       if ($node->tnid == $node->nid) {
-        $new_tnid = db_result(db_query('SELECT nid FROM {node} WHERE tnid = %d ORDER BY translate ASC, nid ASC', $node->tnid));
-        db_query('UPDATE {node} SET tnid = %d WHERE tnid = %d', $new_tnid, $node->tnid);
+        $new_tnid = db_query('SELECT nid FROM {node} WHERE tnid = :tnid ORDER BY translate ASC, nid ASC', array(':tnid' => $node->tnid))->fetchField();
+        db_update('node')
+          ->fields(array('tnid' => $new_tnid))
+          ->condition('tnid', $node->tnid)
+          ->execute();
       }
     }
   }
@@ -326,8 +360,13 @@ function translation_node_get_translations($tnid) {
   if (is_numeric($tnid) && $tnid) {
     if (!isset($translations[$tnid])) {
       $translations[$tnid] = array();
-      $result = db_query(db_rewrite_sql('SELECT n.nid, n.title, n.language FROM {node} n WHERE n.tnid = %d'), $tnid);
-      while ($node = db_fetch_object($result)) {
+      $result = db_select('node', 'n')
+        ->fields('n', array('nid', 'title', 'language'))
+        ->condition('n.tnid', $tnid)
+        ->addTag('node_access')
+        ->execute();
+
+      foreach ($result as $node) {
         $translations[$tnid][$node->language] = $node;
       }
     }