diff --git a/layout/modals/popups/speedometer-select.xml b/layout/modals/popups/speedometer-select.xml
index 1dcd0759..bc70f094 100644
--- a/layout/modals/popups/speedometer-select.xml
+++ b/layout/modals/popups/speedometer-select.xml
@@ -22,8 +22,9 @@
 		<Panel id="SpeedometerSelectContainer" class="flow-down horizontal-align-center">
 		</Panel>
 		<Panel class="row horizontal-align-center mt-4">
-			<TextEntry id="SpeedometerName" class="textentry" maxchars="255" placeholder="#Settings_Speedometer_Customname_Placeholder" text="" />
+			<TextEntry id="SpeedometerName" class="textentry" maxchars="255" placeholder="#Settings_Speedometer_Customname_Placeholder" text="" ontextentrysubmit="SpeedometerSelectPopup.onTextSubmitted()"/>
 		</Panel>
+		<Label id="InvalidNameLabel" class="text-m horizontal-align-center" text="#Settings_Speedometer_InvalidName" />
 		<Panel class="row horizontal-align-center mt-4 generic-popup__button-row">
 			<Button id="CancelButton" class="button mr-4" onactivate="UiToolkitAPI.CloseAllVisiblePopups();">
 				<Label class="button__text" text="#Common_Cancel" />
diff --git a/scripts/modals/popups/speedometer-select.js b/scripts/modals/popups/speedometer-select.js
index da442ee3..6f4565b6 100644
--- a/scripts/modals/popups/speedometer-select.js
+++ b/scripts/modals/popups/speedometer-select.js
@@ -3,20 +3,46 @@ class SpeedometerSelectPopup {
 	static container = $('#SpeedometerSelectContainer');
 	/** @static @type {TextEntry} */
 	static textEntry = $('#SpeedometerName');
+	/** @type {Label} @static */
+	static invalidNameLabel = $('#InvalidNameLabel');
 	static selected = 0;
+	static speedometerNames = [];
+
+	static onTextSubmitted() {
+		if (!this.validateSpeedometerNames()) {
+			this.invalidNameLabel.visible = true;
+			return;
+		}
 
-	static onAddButtonPressed() {
 		const callbackHandle = $.GetContextPanel().GetAttributeInt('callback', -1);
+
 		if (callbackHandle !== -1)
-			UiToolkitAPI.InvokeJSCallback(
-				callbackHandle,
-				SpeedometerSelectPopup.selected,
-				SpeedometerSelectPopup.textEntry.text
-			);
+			UiToolkitAPI.InvokeJSCallback(callbackHandle, SpeedometerSelectPopup.selected, this.textEntry.text);
 		UiToolkitAPI.CloseAllVisiblePopups();
 	}
 
+	static validateSpeedometerNames() {
+		const text = this.textEntry.text;
+		if (text === '' || text.includes(',')) return false;
+
+		if (this.speedometerNames.some((name) => text.toUpperCase() === name.toUpperCase())) return false;
+
+		return true;
+	}
+
+	static invalidNameSubmitted() {
+		SpeedometerSelectPopup.invalidNameLabel.visible = true;
+	}
+
+	static onAddButtonPressed() {
+		this.textEntry.Submit();
+	}
+
 	static init() {
+		SpeedometerSelectPopup.invalidNameLabel.visible = false;
+		SpeedometerSelectPopup.speedometerNames = $.GetContextPanel()
+			.GetAttributeString('speedometerNames', '')
+			.split(',');
 		for (const typeNum of Object.values(SpeedometerTypes)) {
 			const speedometer = $.CreatePanel('Panel', SpeedometerSelectPopup.container, '');
 			speedometer.LoadLayoutSnippet('speedometer-radiobutton');
diff --git a/scripts/pages/settings/speedometer.js b/scripts/pages/settings/speedometer.js
index e09eaecc..9be67805 100644
--- a/scripts/pages/settings/speedometer.js
+++ b/scripts/pages/settings/speedometer.js
@@ -218,7 +218,11 @@ class Speedometers {
 		UiToolkitAPI.ShowCustomLayoutPopupParameters(
 			'',
 			'file://{resources}/layout/modals/popups/speedometer-select.xml',
-			`callback=${UiToolkitAPI.RegisterJSCallback((type, name) => this.addSpeedometerByType(type, name))}`
+			`speedometerNames=${this.detailObjectList
+				.map((x) => x.name)
+				.join(',')}&callback=${UiToolkitAPI.RegisterJSCallback((type, name) =>
+				this.addSpeedometerByType(type, name)
+			)}`
 		);
 	}