2013-2018 Lexus ES350 Front vs Rear Brakes: What Wears First and What to Replace

By Core Brake Parts Tech Team — Circleville, OH warehouse

On a 2013-2018 Lexus ES350, the front brakes almost always wear out first. The fronts do most of the stopping, so plan on front pads (and often front rotors) before the rears. Do not skip the rears, though: the rear discs are small, thin and solid, and they can rust or wear down on their own schedule. Inspect both axles every time the wheels come off.

How the ES350 brake system is laid out

The sixth-generation ES350 (2013-2018) uses disc brakes at all four corners. There are no rear drums on this car, so a rear brake job means pads and rotors, not shoes.

Two practical points follow from that table. First, the front rotor carries more metal and sheds heat better, which is exactly why it sits on the axle that works harder. Second, the rear rotor is thin to begin with. When a rear rotor is scored, lipped or rusted, there is usually not enough thickness to machine it and stay above the minimum stamped on the rotor, so replacement is normally the right call.

Front and rear parts are also generation-specific. The 2019 and newer ES350 moved to a different platform with a different brake package, so a front rotor for a 2019 car will not fit a 2016. Always shop by the exact model year.

Why the front brakes wear first

When you brake, the car's weight pitches forward onto the front tires. That extra load gives the front tires more grip, so the system is designed to send them the bigger share of braking force. A Lexus dealer service guide puts it at up to 70 percent of the stopping power going to the front. More work means more heat and more friction material used up, which is why front pads on an ES350 are usually the first brake item on the invoice.

The ES350 is also a front-wheel-drive sedan with its V6 over the front axle, so the nose already carries more of the car's weight before you ever touch the pedal. That adds to the front bias.

The rears are not idle, though. Stability and traction control apply individual brakes to keep the car straight, and electronic brake-force distribution shares the load between axles more evenly than older proportioning valves did. That is why some ES350 owners find the rear pads closer to worn than they expected when the fronts are replaced.

Symptoms: front vs rear problems

Where the noise or vibration comes from tells you which axle to look at first.

• High-pitched squeal while braking: the pad wear indicator, a small metal tab, is touching the rotor. It is a warning that the pad is near the end of its life. On this car it is usually a front, but check both.
• Grinding: the friction material is gone and metal is cutting the rotor. Stop driving on it; the rotor is now damaged and needs replacing.
• Steering wheel shake when braking from highway speed: points to the front rotors, since they connect to the steering.
• Pedal pulsation felt in the seat or body, not the wheel: often the rear rotors, especially after the car has sat and the rears have rusted.
• Longer stopping distance or a soft pedal: can be worn pads, but a soft or sinking pedal also means checking fluid level, lines and the hydraulic system before just replacing pads.
• Rust ring or lip on the rear rotor: the rear rotor surface is not being cleaned by regular use. The pads may be glazed and the rotor pitted even if there is pad material left.

Lexus dealers note that pad life varies widely with driving: city stop-and-go, hills and heavy loads all wear pads faster than steady highway miles. Do not go by mileage alone; measure.

What to replace, and when

Front brakes

Replace front pads when they reach the wear indicator or measure under the minimum thickness in the service manual. Measure the front rotors with a micrometer. If they are above the minimum thickness stamped on the rotor and have no heat spots, deep grooves or runout, they can be reused or resurfaced. If they cause a steering shake or are near minimum, replace them as a pair. For quiet, low-dust daily driving, a front ceramic brake pad set for the 2013-2018 ES350 and ES300h is the closest match to how the car felt new. You can also browse all ceramic brake pads and brake rotors.

Rear brakes

Inspect the rears every time you do the fronts. Because the rear rotor is a thin solid disc, a rear job on this car is usually pads and rotors together rather than pads alone. If the rear pads have plenty of material left and the rotors are smooth, they can wait for the next front job.

Replace in pairs, always

Pads and rotors are always replaced in axle pairs, both fronts or both rears. Never one side only, or the car can pull under braking.

What to replace at the same time

• Hardware and clips: the abutment clips and anti-rattle springs lose tension and cause pad noise. A new brake hardware kit is cheap insurance.
• Caliper slide pins: clean and relubricate them with a proper brake grease. A sticky pin wears one pad much faster than the other; if the inner and outer pads are uneven, this is the usual reason.
• Brake fluid: brake fluid absorbs moisture over time. If it has not been changed on the schedule in your maintenance guide, flush it with the fluid type printed on the reservoir cap.
• Calipers: replace a caliper that is leaking, has a torn boot, or will not retract. See brake calipers.

Recalls to check on the 2013-2018 ES350

Before blaming worn parts for odd braking behavior, run the VIN at nhtsa.gov. Two campaigns touch this generation's braking:

• NHTSA 15V728000 (2013-2015 ES350 and ES300h): the Pre-Collision System could brake unexpectedly when its radar read a steel joint or plate in the road as an obstacle. Dealers replace affected system components free of charge.
• NHTSA 16V198000 (2016 ES350 built September 1, 2015 to February 29, 2016): a potentially defective ABS actuator could impair brake fluid pressure control when ABS, traction or stability control activates. Dealers inspect and replace the actuator free of charge.

An unexpected hard stop with no obstacle, or odd behavior only when ABS or stability control kicks in, is a recall question first, not a pad question.

How hard is the job?

Front pads and rotors on the ES350 are a straightforward DIY job for someone with a jack, stands, a torque wrench and a caliper piston tool: remove the caliper, hang it (never by the hose), swap pads and rotor, reinstall. The rear is similar in difficulty. Torque the caliper bolts and lug nuts to the values in the factory service manual, pump the pedal before moving the car, and bed in the new pads with a series of moderate stops. If the pedal feels soft afterward, the system needs bleeding before the car is driven.

Frequently Asked Questions

Do the rear brakes on a 2013-2018 ES350 use drums?

No. This generation uses disc brakes at all four wheels. The rear rotor is a solid 281mm disc.

Should I replace front and rear brakes at the same time?

Only if both are worn. The fronts usually need attention first. Measure the rears at every front job and replace them when they reach their limit or the rotors are rusted or scored.

Why are my rear pads wearing faster than I expected?

Stability control and electronic brake-force distribution use the rear brakes more than older systems did, and a sticking slide pin or caliper can speed up wear on one side. Check the pins and caliper when rear wear seems high.

Can I resurface the rear rotors?

Often not. They start thin, so after a cut many fall below the minimum thickness stamped on the rotor. Replacement is usually the better option.

Do 2019 ES350 brake parts fit my 2016?

No. The 2019 and newer ES350 uses a different brake package. Buy parts listed for 2013-2018.

What brake pad type is best for an ES350?

Ceramic pads suit this car well: quiet, low dust and smooth, which matches how the ES was built to drive. Akebono notes its ProACT ceramic line also meets low-copper requirements. See our brake pads for options.

Sources

1. EBC GD7666 rear rotor, 2013-2018 ES350 - rear rotor is solid, 281mm diameter, 10mm thick
2. 2017 Lexus ES350 rotor fitment - 296mm front rotor fitment note
3. Lexus Stevens Creek: How long do Lexus brakes last - fronts handle up to 70 percent of stopping; wear signs; driving factors
4. NHTSA recalls, 2014 Lexus ES350 - campaign 15V728000, Pre-Collision System braking
5. NHTSA recalls, 2016 Lexus ES350 - campaign 16V198000, ABS actuator and build dates
6. Akebono Brakes - ProACT ceramic pads meet low-copper requirements