diff --git a/lib/Doctrine/ORM/Persisters/Collection/ManyToManyPersister.php b/lib/Doctrine/ORM/Persisters/Collection/ManyToManyPersister.php
index 448ad9904..8ebf68a16 100644
--- a/lib/Doctrine/ORM/Persisters/Collection/ManyToManyPersister.php
+++ b/lib/Doctrine/ORM/Persisters/Collection/ManyToManyPersister.php
@@ -534,24 +534,28 @@ class ManyToManyPersister extends AbstractCollectionPersister
         $indexBy        = $mapping['indexBy'];
         $id             = $this->uow->getEntityIdentifier($collection->getOwner());
 
-        $targetEntity   = $this->em->getClassMetadata($mapping['targetEntity']);
+        $sourceClass = $this->em->getClassMetadata($mapping['sourceEntity']);
+        $targetClass = $this->em->getClassMetadata($mapping['targetEntity']);
 
-        if (! $mapping['isOwningSide']) {
+        if ( ! $mapping['isOwningSide']) {
             $associationSourceClass = $this->em->getClassMetadata($mapping['targetEntity']);
-            $mapping  = $associationSourceClass->associationMappings[$mapping['mappedBy']];
+            $mapping = $associationSourceClass->associationMappings[$mapping['mappedBy']];
             $joinColumns = $mapping['joinTable']['joinColumns'];
-            $relationMode = 'relationToTargetKeyColumns';
+            $sourceRelationMode = 'relationToTargetKeyColumns';
+            $targetRelationMode = 'relationToSourceKeyColumns';
         } else {
-            $joinColumns = $mapping['joinTable']['inverseJoinColumns'];
             $associationSourceClass = $this->em->getClassMetadata($mapping['sourceEntity']);
-            $relationMode = 'relationToSourceKeyColumns';
+            $joinColumns = $mapping['joinTable']['inverseJoinColumns'];
+            $sourceRelationMode = 'relationToSourceKeyColumns';
+            $targetRelationMode = 'relationToTargetKeyColumns';
         }
 
-        $quotedJoinTable = $this->quoteStrategy->getJoinTableName($mapping, $associationSourceClass, $this->platform). ' t';
+        $quotedJoinTable = $this->quoteStrategy->getJoinTableName($mapping, $associationSourceClass, $this->platform) . ' t';
         $whereClauses    = array();
         $params          = array();
+        $types           = array();
 
-        $joinNeeded = !in_array($indexBy, $targetEntity->identifier);
+        $joinNeeded = ! in_array($indexBy, $targetClass->identifier);
 
         if ($joinNeeded) { // extra join needed if indexBy is not a @id
             $joinConditions = array();
@@ -559,21 +563,25 @@ class ManyToManyPersister extends AbstractCollectionPersister
             foreach ($joinColumns as $joinTableColumn) {
                 $joinConditions[] = 't.' . $joinTableColumn['name'] . ' = tr.' . $joinTableColumn['referencedColumnName'];
             }
-            $tableName = $this->quoteStrategy->getTableName($targetEntity, $this->platform);
+            $tableName = $this->quoteStrategy->getTableName($targetClass, $this->platform);
             $quotedJoinTable .= ' JOIN ' . $tableName . ' tr ON ' . implode(' AND ', $joinConditions);
+            $columnName = $targetClass->getColumnName($indexBy);
 
-            $whereClauses[] = 'tr.' . $targetEntity->getColumnName($indexBy) . ' = ?';
+            $whereClauses[] = 'tr.' . $columnName . ' = ?';
             $params[] = $key;
-
+            $types[] = Helper::getTypeOfColumn($columnName, $targetClass, $this->em);
         }
 
         foreach ($mapping['joinTableColumns'] as $joinTableColumn) {
-            if (isset($mapping[$relationMode][$joinTableColumn])) {
+            if (isset($mapping[$sourceRelationMode][$joinTableColumn])) {
+                $column = $mapping[$sourceRelationMode][$joinTableColumn];
+
                 $whereClauses[] = 't.' . $joinTableColumn . ' = ?';
                 $params[] = $id[$targetEntity->getFieldForColumn($mapping[$relationMode][$joinTableColumn])];
             } elseif (!$joinNeeded) {
                 $whereClauses[] = 't.' . $joinTableColumn . ' = ?';
                 $params[] = $key;
+                $types[] = Helper::getTypeOfColumn($column, $targetClass, $this->em);
             }
         }
 
@@ -586,7 +594,7 @@ class ManyToManyPersister extends AbstractCollectionPersister
             }
         }
 
-        return array($quotedJoinTable, $whereClauses, $params);
+        return array($quotedJoinTable, $whereClauses, $params, $types);
     }
 
     /**
@@ -618,6 +626,7 @@ class ManyToManyPersister extends AbstractCollectionPersister
         $quotedJoinTable = $this->quoteStrategy->getJoinTableName($mapping, $sourceClass, $this->platform);
         $whereClauses    = array();
         $params          = array();
+        $types           = array();
 
         foreach ($mapping['joinTableColumns'] as $joinTableColumn) {
             $whereClauses[] = ($addFilters ? 't.' : '') . $joinTableColumn . ' = ?';
@@ -625,6 +634,11 @@ class ManyToManyPersister extends AbstractCollectionPersister
             if (isset($mapping['relationToTargetKeyColumns'][$joinTableColumn])) {
                 $params[] = $targetId[$targetClass->getFieldForColumn($mapping['relationToTargetKeyColumns'][$joinTableColumn])];
 
+                $params[] = $targetClass->containsForeignIdentifier
+                    ? $targetId[$targetClass->getFieldForColumn($column)]
+                    : $targetId[$targetClass->fieldNames[$column]];
+                $types[] = Helper::getTypeOfColumn($column, $targetClass, $this->em);
+
                 continue;
             }
 
diff --git a/tests/Doctrine/Tests/Models/ValueConversionType/InversedManyToManyExtraLazyEntity.php b/tests/Doctrine/Tests/Models/ValueConversionType/InversedManyToManyExtraLazyEntity.php
new file mode 100644
index 000000000..b139fa407
--- /dev/null
+++ b/tests/Doctrine/Tests/Models/ValueConversionType/InversedManyToManyExtraLazyEntity.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Doctrine\Tests\Models\ValueConversionType;
+
+use Doctrine\Common\Collections\ArrayCollection;
+
+/**
+ * @Entity
+ * @Table(name="vct_inversed_manytomany_extralazy")
+ */
+class InversedManyToManyExtraLazyEntity
+{
+    /**
+     * @Column(type="rot13")
+     * @Id
+     */
+    public $id1;
+
+    /**
+     * @ManyToMany(
+     *     targetEntity="OwningManyToManyExtraLazyEntity",
+     *     mappedBy="associatedEntities",
+     *     fetch="EXTRA_LAZY",
+     *     indexBy="id2"
+     * )
+     */
+    public $associatedEntities;
+
+    public function __construct()
+    {
+        $this->associatedEntities = new ArrayCollection();
+    }
+}
diff --git a/tests/Doctrine/Tests/Models/ValueConversionType/OwningManyToManyExtraLazyEntity.php b/tests/Doctrine/Tests/Models/ValueConversionType/OwningManyToManyExtraLazyEntity.php
new file mode 100644
index 000000000..dda25b27d
--- /dev/null
+++ b/tests/Doctrine/Tests/Models/ValueConversionType/OwningManyToManyExtraLazyEntity.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Doctrine\Tests\Models\ValueConversionType;
+
+use Doctrine\Common\Collections\ArrayCollection;
+
+/**
+ * @Entity
+ * @Table(name="vct_owning_manytomany_extralazy")
+ */
+class OwningManyToManyExtraLazyEntity
+{
+    /**
+     * @Column(type="rot13")
+     * @Id
+     */
+    public $id2;
+
+    /**
+     * @ManyToMany(
+     *     targetEntity="InversedManyToManyExtraLazyEntity",
+     *     inversedBy="associatedEntities",
+     *     fetch="EXTRA_LAZY",
+     *     indexBy="id1"
+     * )
+     * @JoinTable(
+     *     name="vct_xref_manytomany_extralazy",
+     *     joinColumns={@JoinColumn(name="owning_id", referencedColumnName="id2")},
+     *     inverseJoinColumns={@JoinColumn(name="inversed_id", referencedColumnName="id1")}
+     * )
+     */
+    public $associatedEntities;
+
+    public function __construct()
+    {
+        $this->associatedEntities = new ArrayCollection();
+    }
+}
diff --git a/tests/Doctrine/Tests/ORM/Functional/ValueConversionType/ManyToManyExtraLazyTest.php b/tests/Doctrine/Tests/ORM/Functional/ValueConversionType/ManyToManyExtraLazyTest.php
new file mode 100644
index 000000000..5d9a4dc41
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Functional/ValueConversionType/ManyToManyExtraLazyTest.php
@@ -0,0 +1,160 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\ValueConversionType;
+
+use Doctrine\DBAL\Types\Type as DBALType;
+use Doctrine\Tests\Models\ValueConversionType as Entity;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+/**
+ * The entities all use a custom type that converst the value as identifier(s).
+ * {@see \Doctrine\Tests\DbalTypes\Rot13Type}
+ *
+ * Test that ManyToMany associations work correctly, focusing on EXTRA_LAZY
+ * functionality.
+ *
+ * @group DDC-3380
+ */
+class ManyToManyExtraLazyTest extends OrmFunctionalTestCase
+{
+    public function setUp()
+    {
+        if (DBALType::hasType('rot13')) {
+            DBALType::overrideType('rot13', 'Doctrine\Tests\DbalTypes\Rot13Type');
+        } else {
+            DBALType::addType('rot13', 'Doctrine\Tests\DbalTypes\Rot13Type');
+        }
+
+        $this->useModelSet('vct_manytomany_extralazy');
+        parent::setUp();
+
+        $inversed1 = new Entity\InversedManyToManyExtraLazyEntity();
+        $inversed1->id1 = 'abc';
+
+        $inversed2 = new Entity\InversedManyToManyExtraLazyEntity();
+        $inversed2->id1 = 'def';
+
+        $owning1 = new Entity\OwningManyToManyExtraLazyEntity();
+        $owning1->id2 = 'ghi';
+
+        $owning2 = new Entity\OwningManyToManyExtraLazyEntity();
+        $owning2->id2 = 'jkl';
+
+        $inversed1->associatedEntities->add($owning1);
+        $owning1->associatedEntities->add($inversed1);
+        $inversed1->associatedEntities->add($owning2);
+        $owning2->associatedEntities->add($inversed1);
+
+        $inversed2->associatedEntities->add($owning1);
+        $owning1->associatedEntities->add($inversed2);
+        $inversed2->associatedEntities->add($owning2);
+        $owning2->associatedEntities->add($inversed2);
+
+        $this->_em->persist($inversed1);
+        $this->_em->persist($inversed2);
+        $this->_em->persist($owning1);
+        $this->_em->persist($owning2);
+
+        $this->_em->flush();
+        $this->_em->clear();
+    }
+
+    public static function tearDownAfterClass()
+    {
+        $conn = static::$_sharedConn;
+
+        $conn->executeUpdate('DROP TABLE vct_xref_manytomany_extralazy');
+        $conn->executeUpdate('DROP TABLE vct_owning_manytomany_extralazy');
+        $conn->executeUpdate('DROP TABLE vct_inversed_manytomany_extralazy');
+    }
+
+    public function testThatTheExtraLazyCollectionFromOwningToInversedIsCounted()
+    {
+        $owning = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\OwningManyToManyExtraLazyEntity',
+            'ghi'
+        );
+
+        $this->assertEquals(2, $owning->associatedEntities->count());
+    }
+
+    public function testThatTheExtraLazyCollectionFromInversedToOwningIsCounted()
+    {
+        $inversed = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\InversedManyToManyExtraLazyEntity',
+            'abc'
+        );
+
+        $this->assertEquals(2, $inversed->associatedEntities->count());
+    }
+
+    public function testThatTheExtraLazyCollectionFromOwningToInversedContainsAnEntity()
+    {
+        $owning = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\OwningManyToManyExtraLazyEntity',
+            'ghi'
+        );
+
+        $inversed = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\InversedManyToManyExtraLazyEntity',
+            'abc'
+        );
+
+        $this->assertTrue($owning->associatedEntities->contains($inversed));
+    }
+
+    public function testThatTheExtraLazyCollectionFromInversedToOwningContainsAnEntity()
+    {
+        $inversed = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\InversedManyToManyExtraLazyEntity',
+            'abc'
+        );
+
+        $owning = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\OwningManyToManyExtraLazyEntity',
+            'ghi'
+        );
+
+        $this->assertTrue($inversed->associatedEntities->contains($owning));
+    }
+
+    public function testThatTheExtraLazyCollectionFromOwningToInversedContainsAnIndexbyKey()
+    {
+        $owning = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\OwningManyToManyExtraLazyEntity',
+            'ghi'
+        );
+
+        $this->assertTrue($owning->associatedEntities->containsKey('abc'));
+    }
+
+    public function testThatTheExtraLazyCollectionFromInversedToOwningContainsAnIndexbyKey()
+    {
+        $inversed = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\InversedManyToManyExtraLazyEntity',
+            'abc'
+        );
+
+        $this->assertTrue($inversed->associatedEntities->containsKey('ghi'));
+    }
+
+    public function testThatASliceOfTheExtraLazyCollectionFromOwningToInversedIsLoaded()
+    {
+        $owning = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\OwningManyToManyExtraLazyEntity',
+            'ghi'
+        );
+
+        $this->assertCount(1, $owning->associatedEntities->slice(0, 1));
+    }
+
+    public function testThatASliceOfTheExtraLazyCollectionFromInversedToOwningIsLoaded()
+    {
+        $inversed = $this->_em->find(
+            'Doctrine\Tests\Models\ValueConversionType\InversedManyToManyExtraLazyEntity',
+            'abc'
+        );
+
+        $this->assertCount(1, $inversed->associatedEntities->slice(1, 1));
+    }
+}
diff --git a/tests/Doctrine/Tests/OrmFunctionalTestCase.php b/tests/Doctrine/Tests/OrmFunctionalTestCase.php
index b75137f51..0520a15ef 100644
--- a/tests/Doctrine/Tests/OrmFunctionalTestCase.php
+++ b/tests/Doctrine/Tests/OrmFunctionalTestCase.php
@@ -242,6 +242,10 @@ abstract class OrmFunctionalTestCase extends OrmTestCase
             'Doctrine\Tests\Models\ValueConversionType\InversedManyToManyCompositeIdForeignKeyEntity',
             'Doctrine\Tests\Models\ValueConversionType\OwningManyToManyCompositeIdForeignKeyEntity'
         ),
+        'vct_manytomany_extralazy' => array(
+            'Doctrine\Tests\Models\ValueConversionType\InversedManyToManyExtraLazyEntity',
+            'Doctrine\Tests\Models\ValueConversionType\OwningManyToManyExtraLazyEntity'
+        ),
     );
 
     /**
@@ -457,6 +461,12 @@ abstract class OrmFunctionalTestCase extends OrmTestCase
             $conn->executeUpdate('DELETE FROM vct_auxiliary');
         }
 
+        if (isset($this->_usedModelSets['vct_manytomany_extralazy'])) {
+            $conn->executeUpdate('DELETE FROM vct_xref_manytomany_extralazy');
+            $conn->executeUpdate('DELETE FROM vct_owning_manytomany_extralazy');
+            $conn->executeUpdate('DELETE FROM vct_inversed_manytomany_extralazy');
+        }
+
         $this->_em->clear();
     }