diff --git a/src/Weaviate.Client.Tests/Unit/TestCollection.cs b/src/Weaviate.Client.Tests/Unit/TestCollection.cs
index 00333b18..7033e4e5 100644
--- a/src/Weaviate.Client.Tests/Unit/TestCollection.cs
+++ b/src/Weaviate.Client.Tests/Unit/TestCollection.cs
@@ -582,4 +582,102 @@ public void ToCollectionConfigCreateParams_Succeeds_WhenNoLegacySettings()
         Assert.Equal(export.References, result.References);
         Assert.Equal(export.VectorConfig, result.VectorConfig);
     }
+
+    /// <summary>
+    /// Tests that ReplicationConfig with AsyncConfig maps all fields to the DTO.
+    /// </summary>
+    [Fact]
+    public void ReplicationConfig_WithAsyncConfig_MapsToDto()
+    {
+        var asyncConfig = new ReplicationAsyncConfig
+        {
+            MaxWorkers = 4,
+            HashtreeHeight = 16,
+            Frequency = 1000,
+            FrequencyWhilePropagating = 500,
+            AliveNodesCheckingFrequency = 30000,
+            LoggingFrequency = 60,
+            DiffBatchSize = 100,
+            DiffPerNodeTimeout = 30,
+            PrePropagationTimeout = 120,
+            PropagationTimeout = 60,
+            PropagationLimit = 10000,
+            PropagationDelay = 5000,
+            PropagationConcurrency = 2,
+            PropagationBatchSize = 50,
+        };
+
+        var collection = new CollectionConfig
+        {
+            Name = "TestCollection",
+            ReplicationConfig = new ReplicationConfig { AsyncConfig = asyncConfig },
+        };
+
+        var dto = collection.ToDto();
+
+        Assert.NotNull(dto.ReplicationConfig?.AsyncConfig);
+        var ac = dto.ReplicationConfig!.AsyncConfig!;
+        Assert.Equal(4, ac.MaxWorkers);
+        Assert.Equal(16, ac.HashtreeHeight);
+        Assert.Equal(1000, ac.Frequency);
+        Assert.Equal(500, ac.FrequencyWhilePropagating);
+        Assert.Equal(30000, ac.AliveNodesCheckingFrequency);
+        Assert.Equal(60, ac.LoggingFrequency);
+        Assert.Equal(100, ac.DiffBatchSize);
+        Assert.Equal(30, ac.DiffPerNodeTimeout);
+        Assert.Equal(120, ac.PrePropagationTimeout);
+        Assert.Equal(60, ac.PropagationTimeout);
+        Assert.Equal(10000, ac.PropagationLimit);
+        Assert.Equal(5000, ac.PropagationDelay);
+        Assert.Equal(2, ac.PropagationConcurrency);
+        Assert.Equal(50, ac.PropagationBatchSize);
+    }
+
+    /// <summary>
+    /// Tests that DTO with AsyncConfig round-trips back to the model correctly.
+    /// </summary>
+    [Fact]
+    public void ReplicationConfig_WithAsyncConfig_RoundTripsFromDto()
+    {
+        var dtoAsyncConfig = new Rest.Dto.ReplicationAsyncConfig
+        {
+            MaxWorkers = 8,
+            HashtreeHeight = 12,
+            PropagationLimit = 5000,
+        };
+
+        var dto = new Rest.Dto.Class
+        {
+            Class1 = "TestCollection",
+            ReplicationConfig = new Rest.Dto.ReplicationConfig { AsyncConfig = dtoAsyncConfig },
+        };
+
+        var model = dto.ToModel();
+
+        Assert.NotNull(model.ReplicationConfig?.AsyncConfig);
+        var ac = model.ReplicationConfig!.AsyncConfig!;
+        Assert.Equal(8, ac.MaxWorkers);
+        Assert.Equal(12, ac.HashtreeHeight);
+        Assert.Equal(5000, ac.PropagationLimit);
+        // Unset fields are null
+        Assert.Null(ac.Frequency);
+        Assert.Null(ac.PropagationBatchSize);
+    }
+
+    /// <summary>
+    /// Tests that ReplicationConfig without AsyncConfig does not produce an asyncConfig in the DTO.
+    /// </summary>
+    [Fact]
+    public void ReplicationConfig_WithoutAsyncConfig_ProducesNullAsyncConfigInDto()
+    {
+        var collection = new CollectionConfig
+        {
+            Name = "TestCollection",
+            ReplicationConfig = new ReplicationConfig { Factor = 2 },
+        };
+
+        var dto = collection.ToDto();
+
+        Assert.Null(dto.ReplicationConfig?.AsyncConfig);
+    }
 }
diff --git a/src/Weaviate.Client/Extensions.cs b/src/Weaviate.Client/Extensions.cs
index 73fc0b15..c97f03f8 100644
--- a/src/Weaviate.Client/Extensions.cs
+++ b/src/Weaviate.Client/Extensions.cs
@@ -166,6 +166,25 @@ internal static Rest.Dto.Class ToDto(this CollectionConfig collection)
                 AsyncEnabled = rc.AsyncEnabled,
                 DeletionStrategy = (Rest.Dto.ReplicationConfigDeletionStrategy?)rc.DeletionStrategy,
                 Factor = rc.Factor,
+                AsyncConfig = rc.AsyncConfig is ReplicationAsyncConfig ac
+                    ? new Rest.Dto.ReplicationAsyncConfig
+                    {
+                        MaxWorkers = ac.MaxWorkers,
+                        HashtreeHeight = ac.HashtreeHeight,
+                        Frequency = ac.Frequency,
+                        FrequencyWhilePropagating = ac.FrequencyWhilePropagating,
+                        AliveNodesCheckingFrequency = ac.AliveNodesCheckingFrequency,
+                        LoggingFrequency = ac.LoggingFrequency,
+                        DiffBatchSize = ac.DiffBatchSize,
+                        DiffPerNodeTimeout = ac.DiffPerNodeTimeout,
+                        PrePropagationTimeout = ac.PrePropagationTimeout,
+                        PropagationTimeout = ac.PropagationTimeout,
+                        PropagationLimit = ac.PropagationLimit,
+                        PropagationDelay = ac.PropagationDelay,
+                        PropagationConcurrency = ac.PropagationConcurrency,
+                        PropagationBatchSize = ac.PropagationBatchSize,
+                    }
+                    : null,
             };
         }
 
@@ -389,6 +408,26 @@ internal static CollectionConfigExport ToModel(this Rest.Dto.Class collection)
                             rc.Factor ?? Weaviate.Client.Models.ReplicationConfig.Default.Factor,
 
                         DeletionStrategy = (DeletionStrategy?)rc.DeletionStrategy,
+
+                        AsyncConfig = rc.AsyncConfig is Rest.Dto.ReplicationAsyncConfig ac
+                            ? new ReplicationAsyncConfig
+                            {
+                                MaxWorkers = ac.MaxWorkers,
+                                HashtreeHeight = ac.HashtreeHeight,
+                                Frequency = ac.Frequency,
+                                FrequencyWhilePropagating = ac.FrequencyWhilePropagating,
+                                AliveNodesCheckingFrequency = ac.AliveNodesCheckingFrequency,
+                                LoggingFrequency = ac.LoggingFrequency,
+                                DiffBatchSize = ac.DiffBatchSize,
+                                DiffPerNodeTimeout = ac.DiffPerNodeTimeout,
+                                PrePropagationTimeout = ac.PrePropagationTimeout,
+                                PropagationTimeout = ac.PropagationTimeout,
+                                PropagationLimit = ac.PropagationLimit,
+                                PropagationDelay = ac.PropagationDelay,
+                                PropagationConcurrency = ac.PropagationConcurrency,
+                                PropagationBatchSize = ac.PropagationBatchSize,
+                            }
+                            : null,
                     }
                     : null,
             ShardingConfig = shardingConfig,
diff --git a/src/Weaviate.Client/Models/Collection.Update.cs b/src/Weaviate.Client/Models/Collection.Update.cs
index 8f6c8a05..82e032b1 100644
--- a/src/Weaviate.Client/Models/Collection.Update.cs
+++ b/src/Weaviate.Client/Models/Collection.Update.cs
@@ -610,6 +610,16 @@ public int Factor
         get => WrappedReplicationConfig.Factor;
         set => WrappedReplicationConfig.Factor = value;
     }
+
+    /// <summary>
+    /// Gets or sets fine-grained parameters for asynchronous replication.
+    /// Requires Weaviate 1.36 or later.
+    /// </summary>
+    public ReplicationAsyncConfig? AsyncConfig
+    {
+        get => WrappedReplicationConfig.AsyncConfig;
+        set => WrappedReplicationConfig.AsyncConfig = value;
+    }
 }
 
 /// <summary>
diff --git a/src/Weaviate.Client/Models/ReplicationConfig.cs b/src/Weaviate.Client/Models/ReplicationConfig.cs
index 78641e73..d57b6b54 100644
--- a/src/Weaviate.Client/Models/ReplicationConfig.cs
+++ b/src/Weaviate.Client/Models/ReplicationConfig.cs
@@ -21,6 +21,56 @@ public enum DeletionStrategy
     TimeBasedResolution,
 }
 
+/// <summary>
+/// Fine-grained configuration parameters for asynchronous replication.
+/// All fields are optional; omitted fields use server defaults.
+/// Requires Weaviate 1.36 or later.
+/// </summary>
+public record ReplicationAsyncConfig
+{
+    /// <summary>Maximum number of async replication workers.</summary>
+    public long? MaxWorkers { get; set; }
+
+    /// <summary>Height of the hashtree used for diffing.</summary>
+    public long? HashtreeHeight { get; set; }
+
+    /// <summary>Base frequency in milliseconds at which async replication runs diff calculations.</summary>
+    public long? Frequency { get; set; }
+
+    /// <summary>Frequency in milliseconds at which async replication runs while propagation is active.</summary>
+    public long? FrequencyWhilePropagating { get; set; }
+
+    /// <summary>Interval in milliseconds at which liveness of target nodes is checked.</summary>
+    public long? AliveNodesCheckingFrequency { get; set; }
+
+    /// <summary>Interval in seconds at which async replication logs its status.</summary>
+    public long? LoggingFrequency { get; set; }
+
+    /// <summary>Maximum number of object keys included in a single diff batch.</summary>
+    public long? DiffBatchSize { get; set; }
+
+    /// <summary>Timeout in seconds for computing a diff against a single node.</summary>
+    public long? DiffPerNodeTimeout { get; set; }
+
+    /// <summary>Overall timeout in seconds for the pre-propagation phase.</summary>
+    public long? PrePropagationTimeout { get; set; }
+
+    /// <summary>Timeout in seconds for propagating a batch of changes to a node.</summary>
+    public long? PropagationTimeout { get; set; }
+
+    /// <summary>Maximum number of objects to propagate in a single async replication run.</summary>
+    public long? PropagationLimit { get; set; }
+
+    /// <summary>Delay in milliseconds before newly added or updated objects are propagated.</summary>
+    public long? PropagationDelay { get; set; }
+
+    /// <summary>Maximum number of concurrent propagation workers.</summary>
+    public long? PropagationConcurrency { get; set; }
+
+    /// <summary>Number of objects to include in a single propagation batch.</summary>
+    public long? PropagationBatchSize { get; set; }
+}
+
 /// <summary>
 /// ReplicationConfig Configure how replication is executed in a cluster.
 /// </summary>
@@ -41,6 +91,12 @@ public record ReplicationConfig : IEquatable<ReplicationConfig>
     /// </summary>
     public bool AsyncEnabled { get; set; } = false;
 
+    /// <summary>
+    /// Fine-grained parameters for asynchronous replication.
+    /// Requires Weaviate 1.36 or later; ignored by older servers.
+    /// </summary>
+    public ReplicationAsyncConfig? AsyncConfig { get; set; }
+
     /// <summary>
     /// Conflict resolution strategy for deleted objects.
     /// Enum: [NoAutomatedResolution DeleteOnConflict TimeBasedResolution]
diff --git a/src/Weaviate.Client/PublicAPI.Unshipped.txt b/src/Weaviate.Client/PublicAPI.Unshipped.txt
index 4e2c5678..6d180edd 100644
--- a/src/Weaviate.Client/PublicAPI.Unshipped.txt
+++ b/src/Weaviate.Client/PublicAPI.Unshipped.txt
@@ -6595,6 +6595,50 @@ Weaviate.Client.WeaviateUnprocessableEntityException.WeaviateUnprocessableEntity
 ~Weaviate.Client.Models.Typed.WeaviateGroup<T, TObject>.WeaviateGroup(Weaviate.Client.Models.Typed.WeaviateGroup<T, TObject>! original) -> void
 ~Weaviate.Client.Models.Typed.WeaviateGroup<T>.WeaviateGroup(Weaviate.Client.Models.Typed.WeaviateGroup<T>! original) -> void
 ~Weaviate.Client.Models.Typed.WeaviateObject<T>.WeaviateObject(Weaviate.Client.Models.Typed.WeaviateObject<T>! original) -> void
+Weaviate.Client.Models.ReplicationAsyncConfig
+Weaviate.Client.Models.ReplicationAsyncConfig.AliveNodesCheckingFrequency.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.AliveNodesCheckingFrequency.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.DiffBatchSize.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.DiffBatchSize.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.DiffPerNodeTimeout.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.DiffPerNodeTimeout.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.Frequency.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.Frequency.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.FrequencyWhilePropagating.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.FrequencyWhilePropagating.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.HashtreeHeight.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.HashtreeHeight.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.LoggingFrequency.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.LoggingFrequency.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.MaxWorkers.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.MaxWorkers.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.PrePropagationTimeout.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.PrePropagationTimeout.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationBatchSize.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationBatchSize.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationConcurrency.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationConcurrency.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationDelay.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationDelay.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationLimit.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationLimit.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationTimeout.get -> long?
+Weaviate.Client.Models.ReplicationAsyncConfig.PropagationTimeout.set -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.ReplicationAsyncConfig() -> void
+Weaviate.Client.Models.ReplicationAsyncConfig.ReplicationAsyncConfig(Weaviate.Client.Models.ReplicationAsyncConfig! original) -> void
+Weaviate.Client.Models.ReplicationConfig.AsyncConfig.get -> Weaviate.Client.Models.ReplicationAsyncConfig?
+Weaviate.Client.Models.ReplicationConfig.AsyncConfig.set -> void
+Weaviate.Client.Models.ReplicationConfigUpdate.AsyncConfig.get -> Weaviate.Client.Models.ReplicationAsyncConfig?
+Weaviate.Client.Models.ReplicationConfigUpdate.AsyncConfig.set -> void
+override Weaviate.Client.Models.ReplicationAsyncConfig.Equals(object? obj) -> bool
+override Weaviate.Client.Models.ReplicationAsyncConfig.GetHashCode() -> int
+override Weaviate.Client.Models.ReplicationAsyncConfig.ToString() -> string!
+static Weaviate.Client.Models.ReplicationAsyncConfig.operator !=(Weaviate.Client.Models.ReplicationAsyncConfig? left, Weaviate.Client.Models.ReplicationAsyncConfig? right) -> bool
+static Weaviate.Client.Models.ReplicationAsyncConfig.operator ==(Weaviate.Client.Models.ReplicationAsyncConfig? left, Weaviate.Client.Models.ReplicationAsyncConfig? right) -> bool
+virtual Weaviate.Client.Models.ReplicationAsyncConfig.<Clone>$() -> Weaviate.Client.Models.ReplicationAsyncConfig!
+virtual Weaviate.Client.Models.ReplicationAsyncConfig.EqualityContract.get -> System.Type!
+virtual Weaviate.Client.Models.ReplicationAsyncConfig.Equals(Weaviate.Client.Models.ReplicationAsyncConfig? other) -> bool
+virtual Weaviate.Client.Models.ReplicationAsyncConfig.PrintMembers(System.Text.StringBuilder! builder) -> bool
 Weaviate.Client.RequiresWeaviateVersionAttribute
 Weaviate.Client.RequiresWeaviateVersionAttribute.MinimumVersion.get -> System.Version!
 Weaviate.Client.RequiresWeaviateVersionAttribute.RequiresWeaviateVersionAttribute(int major, int minor, int patch = 0) -> void