diff --git a/packages/customer/integration-tests/__tests__/services/customer-module/index.spec.ts b/packages/customer/integration-tests/__tests__/services/customer-module/index.spec.ts
index cadd6c2b9a..dbc60d896f 100644
--- a/packages/customer/integration-tests/__tests__/services/customer-module/index.spec.ts
+++ b/packages/customer/integration-tests/__tests__/services/customer-module/index.spec.ts
@@ -409,4 +409,81 @@ describe("Customer Module Service", () => {
       expect(remainingCustomers.length).toBe(0)
     })
   })
+
+  describe("removeCustomerFromGroup", () => {
+    it("should remove a single customer from a group", async () => {
+      // Creating a customer and a group
+      const [customer] = await service.create([
+        { first_name: "John", last_name: "Doe", email: "john.doe@example.com" },
+      ])
+      const [group] = await service.createCustomerGroup([{ name: "VIP" }])
+
+      // Adding the customer to the group
+      await service.addCustomerToGroup({
+        customer_id: customer.id,
+        customer_group_id: group.id,
+      })
+
+      const [customerInGroup] = await service.list(
+        { id: customer.id },
+        { relations: ["groups"] }
+      )
+      expect(customerInGroup.groups).toEqual([
+        expect.objectContaining({ id: group.id }),
+      ])
+
+      // Removing the customer from the group
+      await service.removeCustomerFromGroup({
+        customer_id: customer.id,
+        customer_group_id: group.id,
+      })
+
+      const [updatedCustomer] = await service.list(
+        { id: customer.id },
+        { relations: ["groups"] }
+      )
+      expect(updatedCustomer.groups).toEqual([])
+    })
+
+    it("should remove multiple customers from groups", async () => {
+      // Creating multiple customers and groups
+      const customers = await service.create([
+        { first_name: "John", last_name: "Doe", email: "john.doe@example.com" },
+        {
+          first_name: "Jane",
+          last_name: "Smith",
+          email: "jane.smith@example.com",
+        },
+      ])
+      const groups = await service.createCustomerGroup([
+        { name: "VIP" },
+        { name: "Regular" },
+      ])
+
+      // Adding customers to groups
+      const pairsToAdd = [
+        { customer_id: customers[0].id, customer_group_id: groups[0].id },
+        { customer_id: customers[1].id, customer_group_id: groups[1].id },
+      ]
+      await service.addCustomerToGroup(pairsToAdd)
+
+      // Removing customers from groups
+      const pairsToRemove = [
+        { customer_id: customers[0].id, customer_group_id: groups[0].id },
+        { customer_id: customers[1].id, customer_group_id: groups[1].id },
+      ]
+      await service.removeCustomerFromGroup(pairsToRemove)
+
+      // Verification for each customer
+      for (const pair of pairsToRemove) {
+        const [updatedCustomer] = await service.list(
+          { id: pair.customer_id },
+          { relations: ["groups"] }
+        )
+        expect(updatedCustomer.groups).not.toContainEqual(
+          expect.objectContaining({ id: pair.customer_group_id })
+        )
+      }
+    })
+  })
 })
diff --git a/packages/customer/src/services/customer-module.ts b/packages/customer/src/services/customer-module.ts
index 0a1c5dc16c..ccaad8af8e 100644
--- a/packages/customer/src/services/customer-module.ts
+++ b/packages/customer/src/services/customer-module.ts
@@ -124,7 +124,7 @@ export default class CustomerModuleService implements ICustomerModuleService {
     @MedusaContext() sharedContext: Context = {}
   ) {
     let updateData: CustomerTypes.UpdateCustomerDTO[] = []
-    if (typeof idsOrSelector === "string") {
+    if (isString(idsOrSelector)) {
       updateData = [
         {
           id: idsOrSelector,
@@ -264,6 +264,73 @@ export default class CustomerModuleService implements ICustomerModuleService {
     return Array.isArray(dataOrArrayOfData) ? serialized : serialized[0]
   }
 
+  async updateCustomerGroup(
+    groupId: string,
+    data: Partial<CustomerTypes.CreateCustomerGroupDTO>,
+    sharedContext?: Context
+  ): Promise<CustomerTypes.CustomerGroupDTO>
+  async updateCustomerGroup(
+    groupIds: string[],
+    data: Partial<CustomerTypes.CreateCustomerGroupDTO>,
+    sharedContext?: Context
+  ): Promise<CustomerTypes.CustomerGroupDTO[]>
+  async updateCustomerGroup(
+    selector: CustomerTypes.FilterableCustomerGroupProps,
+    data: Partial<CustomerTypes.CreateCustomerGroupDTO>,
+    sharedContext?: Context
+  ): Promise<CustomerTypes.CustomerGroupDTO[]>
+
+  @InjectTransactionManager("baseRepository_")
+  async updateCustomerGroup(
+    groupIdOrSelector:
+      | string
+      | string[]
+      | CustomerTypes.FilterableCustomerGroupProps,
+    data: Partial<CustomerTypes.CreateCustomerGroupDTO>,
+    @MedusaContext() sharedContext: Context = {}
+  ) {
+    let updateData: CustomerTypes.UpdateCustomerGroupDTO[] = []
+    if (isString(groupIdOrSelector)) {
+      updateData = [
+        {
+          id: groupIdOrSelector,
+          ...data,
+        },
+      ]
+    } else if (Array.isArray(groupIdOrSelector)) {
+      updateData = groupIdOrSelector.map((id) => ({
+        id,
+        ...data,
+      }))
+    } else {
+      const ids = await this.customerGroupService_.list(
+        groupIdOrSelector,
+        { select: ["id"] },
+        sharedContext
+      )
+      updateData = ids.map(({ id }) => ({
+        id,
+        ...data,
+      }))
+    }
+
+    const groups = await this.customerGroupService_.update(
+      updateData,
+      sharedContext
+    )
+
+    if (isString(groupIdOrSelector)) {
+      return await this.baseRepository_.serialize<CustomerTypes.CustomerGroupDTO>(
+        groups[0],
+        { populate: true }
+      )
+    }
+
+    return await this.baseRepository_.serialize<
+      CustomerTypes.CustomerGroupDTO[]
+    >(groups, { populate: true })
+  }
+
   async addCustomerToGroup(
     groupCustomerPair: CustomerTypes.GroupCustomerPair,
     sharedContext?: Context
@@ -291,6 +358,30 @@ export default class CustomerModuleService implements ICustomerModuleService {
     return { id: groupCustomers[0].id }
   }
 
+  async removeCustomerFromGroup(
+    groupCustomerPair: CustomerTypes.GroupCustomerPair,
+    sharedContext?: Context
+  ): Promise<void>
+  async removeCustomerFromGroup(
+    groupCustomerPairs: CustomerTypes.GroupCustomerPair[],
+    sharedContext?: Context
+  ): Promise<void>
+
+  @InjectTransactionManager("baseRepository_")
+  async removeCustomerFromGroup(
+    data: CustomerTypes.GroupCustomerPair | CustomerTypes.GroupCustomerPair[],
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<void> {
+    const pairs = Array.isArray(data) ? data : [data]
+    const groupCustomers = await this.customerGroupCustomerService_.list({
+      $or: pairs,
+    })
+    await this.customerGroupCustomerService_.delete(
+      groupCustomers.map((gc) => gc.id),
+      sharedContext
+    )
+  }
+
   @InjectManager("baseRepository_")
   async listCustomerGroups(
     filters: CustomerTypes.FilterableCustomerGroupProps = {},
diff --git a/packages/types/src/customer/service.ts b/packages/types/src/customer/service.ts
index c13608f92d..f39ef3e8ba 100644
--- a/packages/types/src/customer/service.ts
+++ b/packages/types/src/customer/service.ts
@@ -57,6 +57,22 @@ export interface ICustomerModuleService extends IModuleService {
     sharedContext?: Context
   ): Promise<CustomerGroupDTO>
 
+  updateCustomerGroup(
+    groupId: string,
+    data: Partial<CreateCustomerGroupDTO>,
+    sharedContext?: Context
+  ): Promise<CustomerGroupDTO>
+  updateCustomerGroup(
+    groupIds: string[],
+    data: Partial<CreateCustomerGroupDTO>,
+    sharedContext?: Context
+  ): Promise<CustomerGroupDTO[]>
+  updateCustomerGroup(
+    selector: FilterableCustomerGroupProps,
+    data: Partial<CreateCustomerGroupDTO>,
+    sharedContext?: Context
+  ): Promise<CustomerGroupDTO[]>
+
   addCustomerToGroup(
     groupCustomerPair: GroupCustomerPair,
     sharedContext?: Context
@@ -67,6 +83,15 @@ export interface ICustomerModuleService extends IModuleService {
     sharedContext?: Context
   ): Promise<{ id: string }[]>
 
+  removeCustomerFromGroup(
+    groupCustomerPair: { customer_id: string; customer_group_id: string },
+    sharedContext?: Context
+  ): Promise<void>
+  removeCustomerFromGroup(
+    groupCustomerPairs: { customer_id: string; customer_group_id: string }[],
+    sharedContext?: Context
+  ): Promise<void>
+
   list(
     filters?: FilterableCustomerProps,
     config?: FindConfig<CustomerDTO>,