AutoUtility currently tracks 909 official NHTSA owner defect complaints for the 2021 Jeep Wrangler. Electrical System issues are the most frequently reported category, appearing in 306 complaints (33.7% of submitted records). Among these NHTSA complaint records, 20 filings cite a crash, 26 cite a fire, 9 report one or more injuries.

Key Problem Findings
  • Total NHTSA Complaints: 909 reports
  • #1 Reported Problem Area: Electrical System (306 reports • 33.7% of submitted complaints)
  • Secondary Problem Areas: Steering System (248), Suspension (178)
  • Crash-Citing Complaints: 20 filings
  • Fire-Citing Complaints: 26 filings
  • Complaints Reporting Injuries / Fatalities: 9 injury filings • 0 fatality filings
Reporting Methodology: Statistics describe unverified consumer submissions voluntarily filed with NHTSA. Complaint volume is not normalized for vehicle sales volume or miles driven. Multiple components can be cited within a single owner complaint submission.
Total Complaints
909
Submitted to NHTSA ODI
Crash-Citing Complaints
20
Filings citing a collision
Fire-Citing Complaints
26
Filings citing smoke or fire
Complaints Reporting Injuries
9
Filings citing one or more injuries
Complaints Reporting Fatalities
0
Consumer filings citing fatalities

Most Reported Problems for 2021 Jeep Wrangler

Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records

#1 Problem Area 33.7% of complaints

Electrical System

306 owner complaints submitted to NHTSA ODI
⚠️ NHTSA Recall Context

NHTSA records list 3 official safety recall campaigns for this model year involving the same broad component area:

*Component overlap means an official recall exists for the same broad vehicle system. It does not establish that an individual owner complaint was caused by, covered by, or resolved through that recall.
⚠️ 7 crash reports 🔥 12 fire reports 🩹 2 injury report entries
#2 Problem Area 27.3% of complaints

Steering System

248 owner complaints submitted to NHTSA ODI
⚠️ NHTSA Recall Context

NHTSA records list 1 official safety recall campaign for this model year involving the same broad component area:

*Component overlap means an official recall exists for the same broad vehicle system. It does not establish that an individual owner complaint was caused by, covered by, or resolved through that recall.
🔥 2 fire reports
#3 Problem Area 19.6% of complaints

Suspension

178 owner complaints submitted to NHTSA ODI
⚠️ 1 crash report
#4 Problem Area 16.5% of complaints

Engine & Cooling

150 owner complaints submitted to NHTSA ODI
⚠️ NHTSA Recall Context

NHTSA records list 1 official safety recall campaign for this model year involving the same broad component area:

*Component overlap means an official recall exists for the same broad vehicle system. It does not establish that an individual owner complaint was caused by, covered by, or resolved through that recall.
⚠️ 2 crash reports 🔥 9 fire reports
#5 Problem Area 15.3% of complaints

Powertrain & Transmission

139 owner complaints submitted to NHTSA ODI
⚠️ NHTSA Recall Context

NHTSA records list 3 official safety recall campaigns for this model year involving the same broad component area:

*Component overlap means an official recall exists for the same broad vehicle system. It does not establish that an individual owner complaint was caused by, covered by, or resolved through that recall.
⚠️ 4 crash reports 🔥 5 fire reports 🩹 1 injury report entry
Domain Share Note: Share percentage represents the proportion of unique complaint filings referencing each vehicle system. Because single complaints may cite multiple systems (such as engine and electrical simultaneously), domain percentages represent individual category incidence and may sum to over 100%.

Symptoms Mentioned in NHTSA Owner Reports for 2021 Jeep Wrangler

Specific mechanical, electrical, and driver-assist defect symptoms identified via deterministic narrative analysis

AutoUtility uses deterministic phrase matching to identify recurring symptom descriptions within consumer-submitted NHTSA complaint narratives.

Powertrain & Transmission 7.4% of complaints

Loss of Motive Power While Driving

67 complaint narratives describe this symptom
Symptom Identification Method: A complaint may describe more than one symptom, so percentages may sum to more than 100%. Symptom identification reflects text contained in consumer-submitted complaint records and does not establish a confirmed mechanical diagnosis.

Recent NHTSA Owner Reports for 2021 Jeep Wrangler

Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation

Engine & Cooling NHTSA ODI ID: #11758236
Filed: 08/20/2026

"The contact owns a 2021 Jeep Wrangler. The contact stated that while operating the vehicle, the engine overheated, and the vehicle was driving sluggishly with the temperature gauge indicating that the engine was overheating. The vehicle was taken to an independent mechanic who determined that the..."

Incident Date: 08/20/2026 • Raw NHTSA Component: ENGINE AND ENGINE COOLING,ELECTRICAL SYSTEM
Powertrain & Transmission NHTSA ODI ID: #11758009
Filed: 08/19/2026

"When using electric mode, repeatedly and consistently, when I try to accelerate (for example to get onto a highway) despite having the acceleration fully depressed, the car does not accelerate. After some time, the gas powered engine will rev, the RPM will shoot up and then the car will start to..."

Incident Date: 07/21/2026 • Raw NHTSA Component: POWER TRAIN,ELECTRICAL SYSTEM,ENGINE
Electrical System NHTSA ODI ID: #11757585
Filed: 08/18/2026

"After dealer recall 21D inspection on 7/30/2026 I have experienced 2 electrical failures in the recall system, and/or systems associated with recall. The first incident on 7/31/2026 at approximately 9:00 PM my wife, 2 kids, and a neighbors kid were at a stop light for a 4 lane road when the Jeep..."

Incident Date: 07/31/2026 • Raw NHTSA Component: ELECTRICAL SYSTEM
Powertrain & Transmission NHTSA ODI ID: #11757424
Filed: 08/17/2026

"Acceleration lag: either bucking or temporary loss of motive power when attempting to pull into traffic has almost caused us to be hit several times. We had the problem almost immediately after purchase, but the lag was short and the Jeep would leap forward and back tires would squeal which caused..."

Incident Date: 02/19/2026 • Raw NHTSA Component: POWER TRAIN,UNKNOWN OR OTHER
Steering System NHTSA ODI ID: #11756070
Filed: 08/10/2026

"Our Jeep has a death wobble that has almost caused me to have three wrecks where it is taking me out of my lane of travel and put me in Lanes where other people are had to get to the side of the road and try to get it to stop wobbling it. Every time I hit a pothole or a bump it throws me into a..."

Incident Date: 04/10/2026 • Raw NHTSA Component: STEERING
Consumer Narrative Notice: Excerpts are sanitized text descriptions submitted by vehicle owners to the federal ODI database. They reflect the reporting consumer's observations at the time of filing and have not been independently confirmed by vehicle manufacturers or government investigators.

Complaint History for Jeep Wrangler

Reported defect complaint volume across sibling model years (2015–2026)

Model Year NHTSA Complaints Crash Reports Safety Recalls Detailed Report
2015 Jeep Wrangler 467 15 3 View 2015 Problems →
2016 Jeep Wrangler 458 28 5 View 2016 Problems →
2017 Jeep Wrangler 309 19 5 View 2017 Problems →
2018 Jeep Wrangler 1811 22 14 View 2018 Problems →
2019 Jeep Wrangler 732 9 9 View 2019 Problems →
2020 Jeep Wrangler 602 16 12 View 2020 Problems →
2021 Jeep Wrangler Current Page 909 20 15 Current
2022 Jeep Wrangler 381 13 15 View 2022 Problems →
2023 Jeep Wrangler 345 11 14 View 2023 Problems →
2024 Jeep Wrangler 887 12 11 View 2024 Problems →
2025 Jeep Wrangler 69 5 4 View 2025 Problems →
2026 Jeep Wrangler 0 0 3 View 2026 Problems →
Comparative Disclaimer: Complaint totals are unadjusted historical counts and are not normalized for vehicles sold, active fleet size, or total road mileage. Newer model years naturally have had less calendar exposure time to accumulate owner filings.

Detailed NHTSA Component Breakdown for 2021 Jeep Wrangler

Complete distribution of consumer defect reports across all 136 granular NHTSA system and subsystem classifications

Vehicle Component / System Total Complaints Crash Reports Fire Reports Reported Injury Entries Reported Fatality Entries
Electrical System NHTSA category: ELECTRICAL SYSTEM 127 1 3 2 0
Steering NHTSA category: STEERING 91 0 1 0 0
STEERING,SUSPENSION 71 0 0 0 0
Powertrain NHTSA category: POWER TRAIN 57 0 2 0 0
Suspension NHTSA category: SUSPENSION 53 0 0 0 0
Other / Uncategorized NHTSA category: UNKNOWN OR OTHER 47 1 1 1 0
Engine NHTSA category: ENGINE 38 0 2 0 0
ELECTRICAL SYSTEM,ENGINE 30 1 1 0 0
ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM 23 0 0 0 0
FUEL SYSTEM, GASOLINE,ENGINE 21 0 0 0 0
Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM 20 0 1 0 0
POWER TRAIN,ELECTRICAL SYSTEM,ENGINE 19 0 0 0 0
STEERING,SUSPENSION,UNKNOWN OR OTHER 19 0 0 0 0
STEERING,SUSPENSION,WHEELS 15 0 0 0 0
Visibility & Wipers NHTSA category: VISIBILITY/WIPER 13 0 0 0 0
ELECTRICAL SYSTEM,UNKNOWN OR OTHER 12 0 2 0 0
ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE 12 0 2 0 0
ENGINE,FUEL/PROPULSION SYSTEM 11 0 1 0 0
ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM 9 0 1 0 0
ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,ENGINE 8 0 0 0 0
Structure & Body NHTSA category: STRUCTURE 7 0 0 0 0
POWER TRAIN,ENGINE 6 0 2 0 0
Service Brakes NHTSA category: SERVICE BRAKES 6 0 0 0 0
STEERING,ELECTRICAL SYSTEM 6 0 1 0 0
STEERING,UNKNOWN OR OTHER 6 0 0 0 0
Air Bags NHTSA category: AIR BAGS 5 4 0 8 0
POWER TRAIN,ELECTRICAL SYSTEM 5 0 0 0 0
POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM 5 0 0 0 0
Seats & Restraints NHTSA category: SEATS 5 0 0 0 0
POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE 4 0 0 0 0
STEERING,SUSPENSION,ELECTRICAL SYSTEM 4 0 0 0 0
Tires NHTSA category: TIRES 4 0 0 0 0
UNKNOWN OR OTHER,ENGINE 4 0 0 0 0
ELECTRICAL SYSTEM,UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM 3 0 0 0 0
POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM 3 0 0 0 0
POWER TRAIN,ELECTRICAL SYSTEM,UNKNOWN OR OTHER 3 1 0 0 0
POWER TRAIN,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL 3 0 0 0 0
POWER TRAIN,UNKNOWN OR OTHER 3 0 0 1 0
STEERING,FORWARD COLLISION AVOIDANCE 3 0 0 0 0
STEERING,SUSPENSION,POWER TRAIN 3 0 0 0 0
STEERING,SUSPENSION,VEHICLE SPEED CONTROL 3 0 0 0 0
STEERING,VEHICLE SPEED CONTROL 3 0 0 0 0
UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM 3 0 0 0 0
VEHICLE SPEED CONTROL,ENGINE,FUEL/PROPULSION SYSTEM 3 0 0 0 0
AIR BAGS,SEAT BELTS 2 2 0 1 0
ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE 2 1 0 0 0
ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,FUEL/PROPULSION SYSTEM 2 0 0 0 0
ELECTRICAL SYSTEM,VISIBILITY 2 0 0 0 0
EXTERIOR LIGHTING 2 0 0 0 0
Forward Collision Avoidance NHTSA category: FORWARD COLLISION AVOIDANCE 2 0 0 0 0
Fuel System NHTSA category: FUEL SYSTEM, GASOLINE 2 0 0 0 0
POWER TRAIN,ENGINE,FORWARD COLLISION AVOIDANCE 2 0 0 0 0
POWER TRAIN,FUEL/PROPULSION SYSTEM 2 0 0 0 0
POWER TRAIN,SERVICE BRAKES,ENGINE 2 0 0 0 0
POWER TRAIN,STRUCTURE 2 0 0 0 0
POWER TRAIN,VEHICLE SPEED CONTROL,FUEL/PROPULSION SYSTEM 2 0 1 0 0
STEERING,ELECTRICAL SYSTEM,ENGINE 2 0 0 0 0
STEERING,ELECTRICAL SYSTEM,SERVICE BRAKES 2 0 0 0 0
STEERING,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL 2 0 0 0 0
STEERING,ENGINE 2 0 0 0 0
STEERING,POWER TRAIN 2 0 0 0 0
STEERING,POWER TRAIN,ELECTRICAL SYSTEM 2 0 0 0 0
STEERING,WHEELS 2 0 0 0 0
STRUCTURE,UNKNOWN OR OTHER 2 0 1 0 0
SUSPENSION,UNKNOWN OR OTHER 2 0 0 0 0
AIR BAGS,UNKNOWN OR OTHER 1 1 0 1 0
AIR BAGS,VEHICLE SPEED CONTROL 1 1 0 0 0
ELECTRICAL SYSTEM,AIR BAGS,ENGINE 1 0 0 0 0
ELECTRICAL SYSTEM,BACK OVER PREVENTION 1 0 0 0 0
ELECTRICAL SYSTEM,ENGINE,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
ELECTRICAL SYSTEM,ENGINE,LANE DEPARTURE 1 0 0 0 0
ELECTRICAL SYSTEM,EXTERIOR LIGHTING,ENGINE 1 0 0 0 0
ELECTRICAL SYSTEM,EXTERIOR LIGHTING,UNKNOWN OR OTHER 1 0 0 0 0
ELECTRICAL SYSTEM,EXTERIOR LIGHTING,VEHICLE SPEED CONTROL 1 0 0 0 0
ELECTRICAL SYSTEM,HYBRID PROPULSION SYSTEM 1 0 0 0 0
ELECTRICAL SYSTEM,LANE DEPARTURE,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
ELECTRICAL SYSTEM,SERVICE BRAKES 1 1 0 0 0
ELECTRICAL SYSTEM,UNKNOWN OR OTHER,LANE DEPARTURE 1 0 0 0 0
ELECTRICAL SYSTEM,UNKNOWN OR OTHER,SERVICE BRAKES 1 0 0 0 0
ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,SERVICE BRAKES 1 1 0 0 0
ELECTRICAL SYSTEM,WHEELS,ENGINE 1 0 1 0 0
Engine & Cooling NHTSA category: ENGINE AND ENGINE COOLING 1 0 1 0 0
ENGINE AND ENGINE COOLING,ELECTRICAL SYSTEM 1 0 0 0 0
ENGINE AND ENGINE COOLING,ENGINE 1 0 0 0 0
ENGINE AND ENGINE COOLING,VISIBILITY 1 0 0 0 0
ENGINE,FUEL/PROPULSION SYSTEM,ELECTRICAL SYSTEM 1 0 1 0 0
ENGINE,FUEL/PROPULSION SYSTEM,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
ENGINE,SUSPENSION 1 0 0 0 0
Equipment & Accessories NHTSA category: EQUIPMENT 1 0 1 0 0
FORWARD COLLISION AVOIDANCE,LANE DEPARTURE,ELECTRICAL SYSTEM 1 0 0 0 0
FUEL SYSTEM, DIESEL 1 0 0 0 0
FUEL SYSTEM, DIESEL,ENGINE 1 0 0 0 0
HYBRID PROPULSION SYSTEM 1 0 0 0 0
POWER TRAIN,ELECTRICAL SYSTEM,BACK OVER PREVENTION 1 0 0 0 0
POWER TRAIN,ELECTRICAL SYSTEM,EXTERIOR LIGHTING 1 0 0 0 0
POWER TRAIN,ELECTRICAL SYSTEM,SERVICE BRAKES 1 0 0 0 0
POWER TRAIN,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
POWER TRAIN,SERVICE BRAKES,FUEL/PROPULSION SYSTEM 1 0 0 0 0
POWER TRAIN,STRUCTURE,ENGINE 1 0 0 0 0
POWER TRAIN,UNKNOWN OR OTHER,ENGINE 1 0 0 0 0
POWER TRAIN,UNKNOWN OR OTHER,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
POWER TRAIN,VEHICLE SPEED CONTROL,SERVICE BRAKES 1 1 0 0 0
Seat Belts NHTSA category: SEAT BELTS 1 0 0 0 0
SEAT BELTS,ENGINE 1 0 0 0 0
SERVICE BRAKES, AIR,POWER TRAIN,ELECTRICAL SYSTEM 1 1 0 0 0
Service Brakes NHTSA category: SERVICE BRAKES, HYDRAULIC 1 0 0 0 0
SERVICE BRAKES, HYDRAULIC,SERVICE BRAKES, AIR 1 0 0 0 0
SERVICE BRAKES,ENGINE 1 0 0 0 0
SERVICE BRAKES,ENGINE,FUEL/PROPULSION SYSTEM 1 1 0 0 0
SERVICE BRAKES,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
STEERING,ELECTRICAL SYSTEM,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
STEERING,ELECTRICAL SYSTEM,LANE DEPARTURE 1 0 0 0 0
STEERING,ELECTRICAL SYSTEM,UNKNOWN OR OTHER 1 0 0 0 0
STEERING,ENGINE,FUEL/PROPULSION SYSTEM 1 0 0 0 0
STEERING,POWER TRAIN,WHEELS 1 0 0 0 0
STEERING,SERVICE BRAKES 1 0 0 0 0
STEERING,SUSPENSION,ENGINE 1 0 0 0 0
STEERING,VEHICLE SPEED CONTROL,ENGINE 1 0 0 0 0
STEERING,VEHICLE SPEED CONTROL,UNKNOWN OR OTHER 1 0 0 0 0
STEERING,VEHICLE SPEED CONTROL,WHEELS 1 0 0 0 0
STRUCTURE,LATCHES/LOCKS/LINKAGES 1 0 0 0 0
SUSPENSION,ELECTRICAL SYSTEM,ENGINE 1 0 0 0 0
SUSPENSION,POWER TRAIN,STRUCTURE 1 1 0 0 0
SUSPENSION,POWER TRAIN,UNKNOWN OR OTHER 1 0 0 0 0
SUSPENSION,POWER TRAIN,WHEELS 1 0 0 0 0
SUSPENSION,STRUCTURE,UNKNOWN OR OTHER 1 0 0 0 0
SUSPENSION,WHEELS 1 0 0 0 0
UNKNOWN OR OTHER,ENGINE,FUEL/PROPULSION SYSTEM 1 0 0 0 0
UNKNOWN OR OTHER,VISIBILITY/WIPER 1 0 0 0 0
Vehicle Speed Control NHTSA category: VEHICLE SPEED CONTROL 1 1 0 0 0
VEHICLE SPEED CONTROL,SERVICE BRAKES,ENGINE 1 0 0 0 0
VEHICLE SPEED CONTROL,UNKNOWN OR OTHER 1 0 0 0 0
VEHICLE SPEED CONTROL,UNKNOWN OR OTHER,ENGINE 1 0 0 0 0
Visibility / Glass NHTSA category: VISIBILITY 1 0 0 0 0
VISIBILITY/WIPER,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
WHEELS,FORWARD COLLISION AVOIDANCE,LANE DEPARTURE 1 0 0 0 0
Data Attribution & Reporting Methodology: Complaints are unverified voluntary submissions to the NHTSA Office of Defects Investigation (ODI). Because multiple vehicle components can be cited within a single owner complaint submission, component-level rollups may sum to more than the unique complaint count (909). Injury and fatality entries in the detailed table reflect raw values entered by reporting consumers across individual submissions; they are not deduplicated casualty statistics and may include duplicate or unverified entries. Complaint volume is not normalized for sales volume or vehicle mileage and does not represent an audited component failure rate.

Official NHTSA Defect Investigations (4)

3 OPEN 1 CLOSED

Formal safety defect inquiries and engineering analyses opened by the NHTSA Office of Defects Investigation (ODI)

Official Federal Inquiries: NHTSA opens a defect investigation when safety screening or consumer defect trends indicate a potential unreasonable safety risk. An open investigation is a formal inquiry and does not by itself confirm a defect or result in a mandatory recall.
OPEN Preliminary Evaluation (PE) ODI Action #PE24024
Opened: 2024-09-06 • Currently Active

Underhood fires

Affected Component: STEERING:HYDRAULIC POWER ASSIST:PUMP

The Office of Defects Investigation (ODI) has received 9 Vehicle Owner's Questionnaire (VOQ) reports, 1 Death and Injury report, and multiple field reports alleging incidents of engine compartment fires in model year (MY) 2021-2023 Jeep Wrangler and Gladiator vehicles. The majority of the reports describe a fire occurring while the ignition in the vehicle was in an ‘OFF’ state with a suspected origin at the passenger front side of the engine...

✓ Resulted in Safety Recall Campaign: 26V363 Official NHTSA File →
OPEN Recall Query (RQ) ODI Action #RQ24012
Opened: 2024-07-05 • Currently Active

Loss of Motive Power

Affected Component: ELECTRICAL SYSTEM

The Office of Defects Investigation (ODI) has identified 68 Vehicle Owner Questionnaire (VOQ) reports for model years (MY) 2021 through 2024 Jeep Wrangler 4xe vehicles alleging a loss of motive power. Recall 22V-865 was issued by the manufacturer to address an engine shutdown condition in certain MY 2021-2023 Wrangler 4xe vehicles. The complaints noted here contain both post recall remedy failures and failures in vehicles not included within the...

Active federal investigation. Official NHTSA File →
OPEN Engineering Analysis (EA) ODI Action #EA23001
Opened: 2023-03-17 • Currently Active

High pressure fuel pump failure

Affected Component: FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP

The Office of Defects Investigation (ODI) opened PE21-021 on October 14, 2021, to investigate incidents alleging a stall/loss of motive power as a result of high-pressure fuel pump failures in certain model year (MY) 2019-2020 Ram 2500, 3500, 4500, and 5500 heavy duty trucks equipped with 6.7L Cummins turbodiesel engines. During the investigation, ODI sought to determine if the related defect allegation was limited in scope to the recalled popula...

✓ Resulted in Safety Recall Campaign: 24V957 Official NHTSA File →
CLOSED Defect Petition (DP) ODI Action #DP22005
Opened: 2023-01-27 • Closed: 2023-08-07

Pedestrian alert sounds

Affected Component: ELECTRICAL SYSTEM:PROPULSION SYSTEM

NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight ra...

✓ Resulted in Safety Recall Campaign: 22V063000 Official NHTSA File →
Official US Government Data Provenance

The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.

Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.