diff --git a/internal/command/testdata/validate-valid/import_defined_resource/main.tf b/internal/command/testdata/validate-valid/import_defined_resource/main.tf
new file mode 100644
index 0000000000..a3b8090f51
--- /dev/null
+++ b/internal/command/testdata/validate-valid/import_defined_resource/main.tf
@@ -0,0 +1,11 @@
+resource "test_instance" "main" {
+}
+
+import {
+  to = test_instance.main
+  id = test_instance.reference.ami
+}
+
+resource "test_instance" "reference" {
+}
+
diff --git a/internal/command/validate_test.go b/internal/command/validate_test.go
index 026852c2d9..3eac3e5fb5 100644
--- a/internal/command/validate_test.go
+++ b/internal/command/validate_test.go
@@ -187,6 +187,13 @@ func TestUndefinedResourceAsImportTargetShouldSucceed(t *testing.T) {
 	}
 }
 
+func TestDefinedResourceAsImportTargetShouldSucceed(t *testing.T) {
+	output, code := setupTest(t, "validate-valid/import_defined_resource")
+	if code != 0 {
+		t.Fatalf("Should have succeeded: %d\n\n%s", code, output.Stderr())
+	}
+}
+
 func TestDefinedVarAsImportIDShouldSucceed(t *testing.T) {
 	output, code := setupTest(t, "validate-valid/import_id_defined_var")
 	if code != 0 {
diff --git a/internal/tofu/context_import.go b/internal/tofu/context_import.go
index 77a07ca036..a379519104 100644
--- a/internal/tofu/context_import.go
+++ b/internal/tofu/context_import.go
@@ -144,12 +144,12 @@ func (ri *ImportResolver) ValidateImportIDs(ctx context.Context, importTarget *I
 		}
 
 		for _, keyData := range repetitions {
-			_, evalDiags = evaluateImportIdExpression(importTarget.Config.ID, evalCtx, keyData)
+			evalDiags = validateImportIdExpression(importTarget.Config.ID, evalCtx, keyData)
 			diags = diags.Append(evalDiags)
 		}
 	} else {
 		// The import target is singular, no need to expand
-		_, evalDiags := evaluateImportIdExpression(importTarget.Config.ID, evalCtx, EvalDataForNoInstanceKey)
+		evalDiags := validateImportIdExpression(importTarget.Config.ID, evalCtx, EvalDataForNoInstanceKey)
 		diags = diags.Append(evalDiags)
 	}
 
diff --git a/internal/tofu/eval_import.go b/internal/tofu/eval_import.go
index ef68c7cfce..afc2285797 100644
--- a/internal/tofu/eval_import.go
+++ b/internal/tofu/eval_import.go
@@ -20,6 +20,20 @@ import (
 )
 
 func evaluateImportIdExpression(expr hcl.Expression, evalCtx EvalContext, keyData instances.RepetitionData) (string, tfdiags.Diagnostics) {
+	return evaluateImportIdExpressionInner(expr, evalCtx, keyData, false)
+}
+
+// Checks for any potential issues in the import id expression, allowing unknowns as this is part
+// of the validate phase
+func validateImportIdExpression(expr hcl.Expression, evalCtx EvalContext, keyData instances.RepetitionData) tfdiags.Diagnostics {
+	_, diags := evaluateImportIdExpressionInner(expr, evalCtx, keyData, true)
+	return diags
+}
+
+// This should not be used directly, use one of the wrapping methods above
+// Note: When allowUnknown is true, it may return "" as the import id. This is safe as the result is discarded in the validate
+// function above
+func evaluateImportIdExpressionInner(expr hcl.Expression, evalCtx EvalContext, keyData instances.RepetitionData, allowUnknown bool) (string, tfdiags.Diagnostics) {
 	var diags tfdiags.Diagnostics
 
 	if expr == nil {
@@ -48,18 +62,6 @@ func evaluateImportIdExpression(expr hcl.Expression, evalCtx EvalContext, keyDat
 		})
 	}
 
-	if !importIdVal.IsKnown() {
-		return "", diags.Append(&hcl.Diagnostic{
-			Severity: hcl.DiagError,
-			Summary:  "Invalid import id argument",
-			Detail:   `The import block "id" argument depends on resource attributes that cannot be determined until apply, so OpenTofu cannot plan to import this resource.`, // FIXME and what should I do about that?
-			Subject:  expr.Range().Ptr(),
-			//	Expression:
-			//	EvalContext:
-			Extra: evalchecks.DiagnosticCausedByUnknown(true),
-		})
-	}
-
 	if importIdVal.HasMark(marks.Sensitive) {
 		return "", diags.Append(&hcl.Diagnostic{
 			Severity: hcl.DiagError,
@@ -77,6 +79,21 @@ func evaluateImportIdExpression(expr hcl.Expression, evalCtx EvalContext, keyDat
 		})
 	}
 
+	if !importIdVal.IsKnown() {
+		if allowUnknown {
+			return "", diags
+		}
+		return "", diags.Append(&hcl.Diagnostic{
+			Severity: hcl.DiagError,
+			Summary:  "Invalid import id argument",
+			Detail:   `The import block "id" argument depends on resource attributes that cannot be determined until apply, so OpenTofu cannot plan to import this resource.`, // FIXME and what should I do about that?
+			Subject:  expr.Range().Ptr(),
+			//	Expression:
+			//	EvalContext:
+			Extra: evalchecks.DiagnosticCausedByUnknown(true),
+		})
+	}
+
 	var importId string
 	err := gocty.FromCtyValue(importIdVal, &importId)
 	if err != nil {