---
title: "Tesla ESP_a118: Low Brake Performance Assist Explained | EV Fix Guide"
description: "ESP_a118 means Hydraulic Fade Compensation kicked in because the car detected reduced braking performance. It adds brake pressure for you, and the pedal may pull away from your foot with a pumping sound. Tesla says this is normal, but if it keeps happening your pads or rotors may be worn. Tesla Service: $0. Independent: $150 - $600. DIY steps, tools and torque specs included."
canonical: https://evfixguide.com/guides/esp-a118-low-brake-performance-assist
lang: en
last_updated: 2026-10-24
---

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# Tesla ESP_a118: Low Brake Performance Assist Explained

By the EV Fix Guide editorial team · Updated October 24, 2026 · [How we estimate costs](https://evfixguide.com/about#how-we-estimate-costs)

## Quick answer

ESP_a118 means Hydraulic Fade Compensation kicked in because the car detected reduced braking performance. It adds brake pressure for you, and the pedal may pull away from your foot with a pumping sound. Tesla says this is normal, but if it keeps happening your pads or rotors may be worn. At a Tesla Service Center this typically costs **$0 (Normal activation) / $300 - $900 (Brake service, pads or rotors)**. An independent shop charges about **$150 - $600 (Brake inspection, caliper service, pads or rotors)**, and doing it yourself costs **$30 - $250 (Lubricant, fluid, pads or rotors)** — potential savings of **40% - 70%**. DIY difficulty: medium (1 - 2 Hours).

![ESP_a118: Assist for Low Brake Performance Activated](https://evfixguide.com/assets/images/hero-workshop.jpg)

## Symptoms

- 'Assist for low brake performance activated - To stop, keep brake pedal firmly pressed' alert
- Brake pedal pulls away from your foot and braking suddenly gets stronger
- Pumping or buzzing sound from the front of the car during the stop
- Usually after long downhill braking, track use, or in very cold or wet conditions

## Repair cost: Tesla vs independent shop vs DIY

| Option | Typical cost (USD) |
| --- | --- |
| Tesla Service Center | $0 (Normal activation) / $300 - $900 (Brake service, pads or rotors) |
| Independent shop | $150 - $600 (Brake inspection, caliper service, pads or rotors) |
| DIY | $30 - $250 (Lubricant, fluid, pads or rotors) |
| Potential savings | 40% - 70% |

Ranges are US estimates compiled from owner reports and shop quotes; prices vary by region, model year and parts availability. Report your price.

## Can an independent shop fix it?

If the alert keeps coming back in normal driving, any competent brake shop can inspect pads, rotors, calipers and brake fluid. Teslas use regenerative braking so much that rusty rotors and sticking calipers are more common than worn pads.

[Get matched with an independent shop →](https://evfixguide.com/?shop=esp-a118-low-brake-performance-assist#find-shop-section)

## How to fix it yourself (medium, 1 - 2 Hours)

In the moment, keep pressing the brake firmly and do not pump it. Afterwards, a brake inspection, caliper clean-and-lube and fluid test are within reach of experienced DIYers (see our brake caliper and brake fluid guides).

### Tools you need

- Jack and Tesla jack pads, axle stands
- Socket set and torque wrench
- Brake fluid tester
- Brake cleaner and high-temperature caliper lubricant

### Steps

1. When the alert appears, keep pressing the brake pedal steadily. Do not pump it; Tesla says pumping interrupts the assist.
2. The alert clears once you stop or release the pedal. After heavy downhill braking, let the brakes cool before hard use.
3. If it happens again in normal, everyday driving, inspect the brakes: check pad thickness and look for heavy rust or grooves on the rotors.
4. Test the brake fluid for moisture and replace it if it is out of limits.
5. Clean and lubricate the caliper slide pins, and replace pads or rotors if they are worn or badly corroded.
6. If braking still feels weak, book a brake inspection with Tesla or a brake shop.

**Pro tip:** Use the friction brakes now and then (a few firm stops from speed each month) so the rotors stay clean. Teslas that rely almost entirely on regenerative braking are prone to rusty rotors.

## Frequently asked questions

### How much does it cost to fix an ESP_a118 brake alert on a Tesla?

Tesla Service Center: $0 (Normal activation) / $300 - $900 (Brake service, pads or rotors). Independent shop: $150 - $600 (Brake inspection, caliper service, pads or rotors). DIY: $30 - $250 (Lubricant, fluid, pads or rotors). Typical savings versus the service center: 40% - 70%.

### Can I fix an ESP_a118 brake alert myself?

Yes. DIY difficulty is medium and it typically takes 1 - 2 Hours. In the moment, keep pressing the brake firmly and do not pump it. Afterwards, a brake inspection, caliper clean-and-lube and fluid test are within reach of experienced DIYers (see our brake caliper and brake fluid guides).

### Can an independent shop fix an ESP_a118 brake alert instead of Tesla?

Yes. If the alert keeps coming back in normal driving, any competent brake shop can inspect pads, rotors, calipers and brake fluid. Teslas use regenerative braking so much that rusty rotors and sticking calipers are more common than worn pads.

### Which Tesla models are affected by an ESP_a118 brake alert?

This issue is reported on the Tesla Model 3, Model Y, Model S, Model X and Cybertruck.

## Related guides

- [Tesla Brake Caliper Service & Rotor Rust: Cost & DIY — Independent: $100 - $250](https://evfixguide.com/guides/brake-caliper-service-rotor-rust)
- [Tesla Model 3/Y Inner Tire Wear: Alignment Cost Guide — Independent: $100 - $200](https://evfixguide.com/guides/uneven-tire-wear-alignment)
- [Tesla TPMS Warning & Sensor Fault: Cost & Fix Guide — Independent: $60 - $150](https://evfixguide.com/guides/tpms-tire-pressure-warning)
- [Tesla Brake Fluid Test & Replacement: Cost & DIY — Independent: $80 - $150](https://evfixguide.com/guides/brake-fluid-test-replacement)
- [Tesla DI_a138: Front Motor Disabled - Cause & Cost — Independent: $1,500 - $4,000](https://evfixguide.com/guides/di-a138-front-motor-disabled)
- [Tesla DIR_a251 / DIF_a251: Gearbox Fluid Service Guide — Independent: $150 - $350](https://evfixguide.com/guides/dir-a251-gearbox-fluid-service)

This guide is for information only. High-voltage components (orange cables) can be lethal — leave them to trained technicians. Not affiliated with Tesla, Inc.