Although this sportive sedan is low maintenance and also offers comfort, reliability and an elegant design, over the years and its constant use, it is easy to need replacement of the brake master cylinder to guarantee its optimal functioning and maximize its power. Therefore, in the following article we are going to guide you through the process, giving you practical and easy tips to ensure a successful result.
Before delving into the removal and installation processes, let’s look at a couple of important points to take into account for your safety and that of your car:
Tips to follow
Follow the user manual of your Nissan: These technical and specific processes always require attention to detail, which is why it is important to follow the instruction manual to the letter. Additionally, we recommend that you read it carefully before starting.
Have the necessary tools on hand: Before you start working on removing the brake master cylinder, make sure you have your tool box or kit. If you’re not sure which ones to use, we’ll show you a list below.
Research common problems: Conducting a brief investigation into typical failure symptoms before beginning the process is a crucial step. In this way, you ensure against inconveniences while you replace the cylinder or future failures due to poor installation.
Check everything before turning it on and driving: this part is vital, preventing accidents will depend on it. For example: checking that the brake fluid is full and level or seeing that the pistons are correctly connected.
Prepare for unforeseen events: even if you follow all the steps very carefully, in this type of procedure there is always the possibility of facing obstacles that had not been planned, which is why we recommend that you prepare in advance and foresee possible scenarios so that you can address a better solution easily in case they arise.
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Tools to perform the procedures
- Key kit
- Pliers set
- A hydraulic lifting support
- A container to collect brake fluid
- Latex gloves.
- Brake fluid
- Brake fluid level
The following tutorial works for the models below:Â
- Nissan Altima 2016
- Nissan Altima 2017
- Nissan Altima 2018
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Nissan Altima Brake Master Cilynder Removal And Installation
CAUTION:
- Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is splashed on painted areas, wash it away with water immediately.
- Do not scratch the piston of the master cylinder when installing/removing because the piston is exposed. Check for any dust on the piston, and wash with brake fluid if needed.
- Hold the master cylinder body when handling the master cylinder assembly. Do not hold the piston because the piston might become detached if pulled strongly.
- Refill the reservoir tank with new brake fluid “DOT 3”.
- Do not reuse drained brake fluid.
- Do not reuse the master cylinder O-ring.
NOTE: When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.
Nissan Altima 2016-2018 Brake Master Cilynder Removal
- Drain the brake fluid. Refer to Drain and Refill.
- Remove air cleaner assembly and air ducts. Refer to Removal and Installation (QR25DE) or Removal and Installation (VQ35DE).
- Disconnect the harness connector from the brake fluid level switch.
- Remove the brake fluid level switch.
- Disconnect the brake pipes from the master cylinder using a flare nut wrench.
- Remove the master cylinder assembly nuts.
- Remove the master cylinder assembly.
- Remove and discard the O-ring from the master cylinder
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Altima 5th Gen Brake Master Cilynder Installation
Installation is in the reverse order of removal.
- Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease to the brake booster at (A) position as shown. Be sure the O-ring is in the proper position before installing the master cylinder to the brake booster.

CAUTION:- Do not reuse O-ring.
- Do not reuse master cylinder assembly nuts.
- Tighten brake tube flare nut to the specified torque using a flare nut crowfoot and torque wrench. Refer to Exploded View.
- Check the brake pedal height after installing the brake master cylinder assembly. Refer to Inspection and Adjustment.
- Refill with new brake fluid and bleed air. Refer to the Bleeding Brake System.
The execution of these processes is crucial for the safety of the vehicle and also your own safety. If you find the procedures mentioned above very complex, we can mention that it may be necessary for you to contact specialists. At AutoTech Mobile Mechanic we offer excellent light mechanics services, we specialize in checkups, repairs, installations and maintenance of brake systems and we are also designed to adapt to your comfort, coming to your home to avoid long lines and other inconveniences that you can find in centers. mechanical attention.
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