2014-2016 Maserati Ghibli Brake Fluid Type and Flush Interval

By Core Brake Parts Tech Team — Circleville, OH warehouse

The 2014-2016 Maserati Ghibli uses a synthetic, glycol-based DOT 4 brake fluid. Maserati's owner's manuals list FMVSS 116 DOT 4 and SAE J1704, with Petronas Tutela TOP 4 as the recommended fill, and the maintenance schedule calls for replacing the fluid every 2 years regardless of mileage. Any quality DOT 4 fluid that meets those standards is correct; do not use DOT 5 silicone or any mineral-based fluid.

What Brake Fluid the Ghibli Takes

The refilling table in the Ghibli owner's manual lists the braking system fluid as a synthetic fluid meeting several overlapping standards. They all describe the same class of fluid, so a bottle labeled DOT 4 that also lists SAE J1704 or ISO 4925 Class 4 fits the requirement.

The later (2018) Ghibli manual lists the braking system capacity as 0.8 liters, plus or minus 4 percent. The manual pages we reviewed for the earlier cars do not print a capacity on the refilling page, so plan on buying at least a full liter for a complete flush: you need extra to push old fluid out of all four calipers, not just refill the reservoir.

The manual also carries a caution worth repeating: the symbol on the reservoir cap identifies synthetic fluid, and using a mineral fluid damages the rubber seals in the brake system permanently. Petroleum products of any kind, including power steering fluid and engine oil, must never get into the reservoir.

Why DOT 4 Has to Be Replaced Every Two Years

Glycol-based brake fluid is hygroscopic: it absorbs moisture from the air over time, largely through the porosity of the brake hoses. Water lowers the fluid's boiling point. When fluid near a hot caliper boils, it forms vapor, and vapor compresses where liquid does not. The result is a pedal that sinks toward the floor during hard or repeated stops, exactly the kind of driving a twin-turbo sport sedan invites.

The federal standard for brake fluid, FMVSS 116, sets two minimum boiling points for each grade:

The "wet" number is measured after the fluid has absorbed 3.7 percent water by volume. ADVICS, an OEM brake supplier, notes that DOT 4 formulas typically reach that saturation level after about two years of service, which is exactly why Maserati's schedule says 2 years instead of a mileage figure. A Ghibli that sits in a garage most of the year still needs the flush on time, because the fluid picks up moisture whether the car is driven or not.

Note that DOT 5 in the table above is silicone fluid. Its higher number does not make it an upgrade: it is not the synthetic glycol fluid Maserati specifies and should never go in a Ghibli.

Can You Use DOT 5.1 or a Racing Fluid?

DOT 5.1 is glycol-based like DOT 4, and Brembo describes it as a fluid with superior high-temperature resistance suited to high-performance cars. Brembo's own guidance, however, is that a car should keep using the type of fluid the manufacturer specified for its whole service life, and Maserati specifies DOT 4. For a street-driven Ghibli, a quality DOT 4 that meets SAE J1704 is the right answer.

If you do run a high-boiling-point racing DOT 4 for track days, those fluids are usually changed more often than the 2-year street interval. Whatever you choose, flush the old fluid out completely rather than topping off with a different product.

Symptoms That the Fluid Is Overdue

• Soft or sinking pedal after several hard stops, which firms up again once the brakes cool. This is the classic sign of moisture-laden fluid boiling.
• Dark fluid in the reservoir. ADVICS lists severely discolored fluid as a sign it needs attention; fresh fluid is clear to light amber.
• Brake warning light. The manual explains that the brake indicator monitors fluid level, pad wear and parking brake engagement. A low fluid level usually means worn pads (the caliper pistons have moved out and taken fluid with them) or a leak, not that the fluid simply evaporated.
• Service records that show no brake fluid change in more than two years. On a 2014-2016 car that has changed hands, a skipped flush is common.

If the pedal feels soft even with cold brakes, the problem may be air in the system, a leaking line or hose, or a master cylinder issue rather than just old fluid. That needs a hands-on inspection before the car is driven hard.

How to Check and Flush the Fluid on a Ghibli

The reservoir sits under an access cover in the engine bay, labeled in the manual as the brake fluid reservoir access cover. The manual's level-check steps are simple: remove the access cover, clean the top of the master cylinder reservoir before opening the cap so dirt cannot fall in, and add fluid only up to the MAX mark. Use fluid from a new or tightly sealed container, since an opened bottle on a shelf absorbs moisture too, and wipe up any spill immediately because brake fluid damages paint and vinyl.

A full flush is more involved than a top-off:

1. Remove as much old fluid from the reservoir as you can and refill with fresh DOT 4.
2. Bleed each caliper, working from the corner farthest from the master cylinder toward the closest, until clean fluid comes out with no bubbles. Keep the reservoir from running low at any point, or you will pull air into the ABS unit.
3. Tighten each bleeder to the value in the factory service manual; bleeder screws are small and strip easily.
4. Top the reservoir to MAX, reinstall the cap and cover, and confirm a firm pedal before driving.

The Ghibli has ABS and electronic stability control, and the Ghibli manual describes an electric parking brake with actuators at the rear calipers. A standard pressure or two-person bleed renews the fluid at the wheels, but if air ever gets into the ABS hydraulic unit, a scan tool that can cycle the ABS pump and valves is needed to purge it. For that reason, many owners have a Maserati dealer or a shop with Maserati-capable diagnostics do the flush, and Maserati's manual itself suggests contacting an authorized dealer for fluid replacement.

What to Do at the Same Time

A fluid flush is the natural time to look at the rest of the brake system. The Ghibli's maintenance schedule lists an inspection of the brake lines, calipers and connections alongside the fluid change. With the wheels off, check pad thickness and rotor condition. If the pads are close to their wear limit, replace them now so the new fluid is not pushed back up into the reservoir a few months later.

For the 2014-2016 Ghibli, we carry the EBC Yellowstuff front brake pad set for the 2014-2016 Ghibli 3.0L twin turbo, the EBC Yellowstuff front pads for the 2014 and newer Ghibli RWD, and the EBC Redstuff ceramic rear brake pads for the Ghibli. The two front sets fit different factory caliper packages, so match the pad shape to the car before ordering. You can also browse our full brake pad selection and brake rotors, and if a hose is cracked or swollen, see our brake hoses.

Frequently Asked Questions

What brake fluid does a 2015 Maserati Ghibli use?

A synthetic DOT 4 brake fluid meeting FMVSS 116 DOT 4 and SAE J1704. Maserati recommends Petronas Tutela TOP 4, but any quality DOT 4 that lists those standards meets the specification.

How often should Ghibli brake fluid be changed?

Every 2 years, according to the maintenance schedule in the owner's manual. The interval is based on time, not mileage, because the fluid absorbs moisture even when the car is parked.

Can I top off with a different brand of DOT 4?

For a small top-off, any sealed, fresh DOT 4 meeting the same standards is the correct fluid type. For a flush, use one product and replace all of the old fluid so you know exactly what is in the system.

Is DOT 5 better because it has a higher boiling point?

No. DOT 5 is silicone-based and is not the synthetic glycol fluid the Ghibli's system is designed for. Stick with DOT 4 as Maserati specifies.

Why is my Ghibli brake fluid level low?

As pads wear, the caliper pistons move outward and the fluid level drops. A slightly low level with worn pads is normal; a low level with good pads points to a leak that needs to be found before driving.

Sources

1. Maserati Ghibli Owner's Manual, Refilling Capacities (ManualsLib) - DOT 4 and related standards, Petronas Tutela TOP 4 recommendation
2. Maserati Ghibli Owner's Manual, Brake Fluid Level Check (ManualsLib) - level check steps and MAX mark
3. 2015 Maserati Ghibli Owner's Manual (manua.ls) - brake fluid change every two years
4. 2018 Maserati Ghibli Owner's Manual (PDF) - 0.8 L capacity, 2-year replacement, synthetic-fluid caution, EPB and warning light descriptions
5. 49 CFR 571.116, FMVSS 116 Motor Vehicle Brake Fluids (Cornell LII) - dry and wet boiling point minimums for DOT 3, DOT 4 and DOT 5
6. ADVICS: Brake Fluid Boiling Points - wet boiling point definition (3.7 percent water), DOT 4 saturation at about two years, discolored fluid as a warning sign
7. Brembo: Brake Fluid for Cars - moisture absorption through hoses, keep the manufacturer-specified fluid type, DOT 5.1 for high-performance use