Component

SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

733 NHTSA complaints about service brakes, hydraulic:power assist:vacuum issues across 31 makes and 207 models.

Data updated August 2026. Counts render from the NHTSA Office of Defects Investigation standardized component field; severity flags cross-reference NHTSA ODI complaint flags for owner-reported crash, fire, and injury markers. This page is for informational purposes and does not replace NHTSA recall notices or a vehicle-specific inspection. Methodology · Corrections.

NHTSA ODI component intake brief

ODI category SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM

733 filings · 207 models · 31 makes · vintage August 2026

  • FILINGS MODERATE 733 ODI rows
  • MODELS 207 nameplates citing this part
  • MAKES 31 manufacturers in corpus
  • CRASH 7.4% 54 crash-flagged
  • RANK #178 of 696 categories
  • SEV INJURY 3 deaths · 33 injuries
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM (this)SERVICE BRAKES, HYDRAULIC:PO…733POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:FLOOR SHIFTPOWER TRAIN:AUTOMATIC TRANSM…718POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT:SEALPOWER TRAIN:AXLE ASSEMBLY:AX…761EQUIPMENT:ELECTRICAL700
ODI filing volume neighbourhood: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM vs nearest complaint-total peers

SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM sits MODERATE on ODI intake volume (#178 of 696 standardized categories) with a INJURY severity stamp (3 reported fatalities across 207 models). Open Mitsubishi Montero (category leader) →

SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM model-concentration reading

The standout signal for service brakes, hydraulic:power assist:vacuum is model concentration: Mitsubishi Montero accounts for 40 filings (5.5% of this category) out of 733 total.

Moderate-volume categories still show a fingerprint in the model table below, cross-check each nameplate's recall and investigation history before inferring a defect pattern.

Next step: compare Mitsubishi Montero against POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:FLOOR SHIFT on filing totals before treating service brakes, hydraulic:power assist:vacuum volume as a purchase signal.

733
Complaints
207
Models Affected
54
Crashes
3
Fires
3
Deaths

Most Affected Vehicles

# Vehicle Complaints
1 Mitsubishi Montero
40
2 Chevrolet Blazer
36
3 Dodge Neon
25
4 Chevrolet S10
22
5 Volkswagen Passat
20
6 Ford Explorer
18
7 Chevrolet Tahoe
17
8 Chevrolet Suburban
15
9 Saturn SKY
13
10 Plymouth Neon
13
11 Ford F-150
13
12 Chevrolet Silverado 1500
13
13 Lincoln Town CAR
12
14 GMC Jimmy
12
15 Mercury Sable
11
16 Dodge RAM
11
17 Chevrolet Silverado
11
18 Ford Taurus
9
19 Ford Crown Victoria
9
20 Audi A4
9
21 Volvo S40
8
22 Toyota Corolla
8
23 Mercury Grand Marquis
8
24 Lincoln Continental
8
25 Dodge Intrepid
8
26 Ford Ranger
7
27 Ford E-350
7
28 Dodge RAM 2500
7
29 BMW 745li
7
30 SAAB 9-5
6

Recent Complaints

2020 Chevrolet Equinox

The contact owns a 2020 Chevrolet Equinox. The contact stated that while driving approximately 40 MPH, the message "Engine Power Reduced" was suddenly displayed. While attempting to stop, the brake pe

2017 GMC Acadia

The contact owns a 2017 GMC Acadia. The contact stated while driving at an undisclosed speed, the brake pedal was depressed; however, the brake pedal was firm. The contact applied full pressure to the

2012 Lincoln MKX

brake booster

2019 GMC Terrain

The contact called on behalf of her husband who owns a 2019 GMC Terrain. The contact stated that while her husband was driving approximately 50 MPH, the brakes seized, and the contact veered off into

2020 Chevrolet Equinox

The contact owns a 2020 Chevrolet Equinox. The contact stated that while exiting the highway at 50 MPH, the brake pedal had hardened and the contact could not depress the brake pedal. Several brake wa

2019 Chevrolet Equinox

Brakes locked up after turning off of an exit leading to an intersection and incident that could have killed myself and those around me. AAA towed my car to their garage and said it fits a safety re

2018 Chevrolet Silverado 1500

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while approaching a stop sign, the contact depressed the brake pedal, but the brake pedal failed to function properly. The con

1998 Toyota Sienna

steering component that breaks, causing a driver to lose control.

2018 GMC Terrain

The contact owns a 2018 GMC Terrain. The contact stated while driving 35 MPH, the brake pedal was depressed and went to the floorboard without warning. The contact started driving to the dealer after

2012 Toyota Prius V

The contact owns a 2012 Toyota Prius V. The contact stated while driving approximately 35 MPH and at various other speeds, the contact heard an abnormal whirring sound like an electric motor engaging

2016 Chevrolet Silverado 1500

Dash board instrument panel and radio loses all power, May even cause vehicle to shut off not able to steer, If the cruise control is set it shuts it off. It mostly happens when you apply the brake or

2013 Ford Edge

The contact owns a 2013 Ford Edge. The contact stated while driving 45 MPH and depressing the brake pedal, the contact heard air coming from the brake pedal. The contact stated that the low brake air

2020 Chevrolet Equinox

The contact owns a 2020 Chevrolet Equinox. The contact stated that while driving at approximately 55 MPH, he depressed the brake pedal however, the vehicle failed to respond. As a result, the contact

2016 Chevrolet Silverado 1500

The contact owns a 2016 Chevrolet Silverado 1500. The contact stated that the vehicle was taken to the dealer to be repaired under NHTSA Campaign Number: 19V645000 (Service Brakes, Hydraulic) and the

2016 Chevrolet Malibu

The contact owns a 2016 Chevrolet Malibu. The contact stated while driving 65 MPH and depressing the brake pedal, the brake pedal was firm. The contact used the parking brake to slow and stop the vehi

2015 Cadillac CTS

The contact owns a 2015 Cadillac CTS. The contact stated that while driving approximately 40 MPH and attempting to stop, the braking system malfunctioned, and the brake pedal became very difficult to

2015 Volkswagen Passat

Power brakes are not functional on startup when cold -- brake pedal is very stiff and takes a lot of pedal pressure to stop the car from moving while exiting driveway. Generally, braking improves w

2009 Mercedes-Benz Ml350

2009 MERCEDES BENZ ML350. CONSUMER WRITES IN REGARD TO NHTSA SAFETY RECALL 22V-315.

2018 Chevrolet Malibu

The contact owns a 2018 Chevrolet Malibu. The contact stated while driving approximately 55 MPH, the vehicle shifted into Limp Mode. The contact stated that she pulled over and when the gear was shift

2018 Chevrolet Malibu

The contact owns a 2018 Chevrolet Malibu. The contact stated that while driving at 70 MPH, the brake pedal depressed and it traveled to the floorboard as the vehicle failed to stop without warning. Af

Verify with NHTSA · consumer-reported counts are not verified defect findings.