Ford and Lincoln vehicles equipped with wired keyless entry keypad systems and accessory wireless keyless entry keypad systems may or may not come with a wallet card containing the master code. Unlike the integrated wired keypad, the accessory wireless keypad master code cannot be retrieved from the vehicle using a diagnostic scan tool or from the label printed on the body control module (BCM). The Factory Keyless Entry Code application within the diagnostic scan tool will not provide an applicable master code for the accessory wireless keypad. If the wallet card for an accessory keypad is not available, the "Wireless RF Keypad Diagnosis Guide" can be referenced and provides direction on how
full bulletin at NHTSA ↗2018 Ford Mustang body problems
moderate 14 complaints filed with NHTSA · avg repair $1,500 · see body across all vehicles →
Complaints
14
Recalls
0
Avg fix
$1,500
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering body on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Certain 2015 â 2021 Model Year Mustang Convertible Vehicles - Door Opens to Secondary Latch Position
full bulletin at NHTSA ↗This article supersedes TSB 21-2220 to update the model years affected and part list. Some 2018-2024 Mustang coupe vehicles may exhibit a sagging headliner or gap where the headliner meets the upper door weatherstrip. This may be due to an outward bent door frame moulding not allowing the weatherstrip to overlap the headliner properly. To correct this condition, follow the Service Procedure to replace the door frame moulding.
full bulletin at NHTSA ↗For 2000-2024 Ford and Lincoln vehicles, swapping a module from a vehicle for diagnosis purposes is likely to cause errors and is not recommended. It is also not recommended to order a replacement module using a vehicle identification number (VIN) from a different vehicle. Most modules on these affected vehicles are VIN/vehicle specific and hardware variations between modules do exist. Swapping a module from a vehicle or ordering a module using a different vehicle/VIN can cause ineffective repairs and additional vehicle down time. Make sure all appropriate Workshop Manual (WSM) procedures are followed when diagnosing the condition prior to all module replacements and only order modules using
full bulletin at NHTSA ↗Some 2015-2022 Mustang vehicles may exhibit a water leak onto the front carpet that originates from the either the left or right A-pillar. This may be due to a detached A-pillar body seal. Follow the service procedure to repair the vehicle.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Door latch failure dominates these complaints. Owners report passenger doors — and sometimes driver doors — unlatching spontaneously while driving at speeds from 30 mph to 70+ mph, even when locked. This happens on highways, city streets, and over bumps or railroad tracks. It occurs repeatedly in the same vehicle, sometimes multiple times within 30 minutes. The door-ajar indicator lights up and chimes sound. Ford's Customer Satisfaction Program 21N10 addresses the latch but requires the owner to pay a diagnostic fee; no recall has been issued.
A separate cluster of complaints describes water leaking into the rear footwell during storms and rain. One owner took their car to the dealer five times over a year, where technicians replaced window seals on both sides and recommended windshield replacement — yet the leak persisted after each repair. The owner expressed concern about structural damage from prolonged water exposure.
Convertible owners report a distinct problem: rear windows won't reseat properly when retracted, allowing rain into the cabin and causing mold and rust damage. This happens every time the top goes down, and manual adjustment cannot fix it.
Same Ford Mustang body reports on nearby years: 2015 · 2016 · 2017
Failure modes owners describe
Door Latch Failure – Spontaneous Unlatching
Passenger and driver doors unlatch and open while the vehicle is in motion, occurring at speeds ranging from low (30 mph, bump conditions) to highway speeds (70+ mph). The defect persists even when doors are secured and locked, and owners report it happens repeatedly on both doors.
When: Multiple instances across ownership periods, some within 30 minutes of each other; one owner reported it after 10 months of ownership
Symptoms owners cite: Passenger door unlatches at highway speed (70 mph); Driver side door unlatches at highway speed; Both doors unlatching in same trip; Door opens on bumps and railroad tracks at low speed; Occurs even in locked position; Door-ajar indicator and chime activate; Multiple unlatches within short time window
Repairs/costs cited: Ford Customer Satisfaction Program 21N10 addresses door latch issue but requires owner to pay diagnostic fee; no recall issued as of complaint date
Recalls/TSBs owners mention: Customer Satisfaction Program 21N10 — owner must pay diagnostic fee to confirm latch issue
Water Intrusion – Rear Footwell and Window Seals
Persistent water leak into the rear footwell during rain and storms, traced to window seal failures. Multiple dealer repair attempts including rubber seal replacement on both side windows and front windshield replacement have not resolved the issue. Owner reports structural integrity concern.
When: Ongoing for past year; vehicle taken to dealer 5 times
Symptoms owners cite: Rear footwell fills with water during storms and rain; Water breach recurring after repairs; Water leak from window seals
Repairs/costs cited: Dealer replaced rubber around both side windows, recommended front windshield replacement; leak persisted after each repair attempt
Rear Window Seal/Seating Failure – Convertible Models
On convertible models, rear windows will not return to proper seating position when retracted, allowing rain ingress and interior damage including mold and rust. Problem occurs every time the convertible top is lowered.
When: Recurring issue each time convertible top is put down
Symptoms owners cite: Rear windows will not go back up properly; Rain enters through improperly seated windows; Mold growth in interior; Rust damage to interior; Manual hand adjustment cannot properly seat windows
Synthesized from 14 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had body trouble with your 2018 Ford Mustang?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the body problem on the 2018 Ford Mustang?
It's a documented issue but not catastrophic. 14 complaints have been filed. Repairs average $1,500 and most owners catch it before it causes a breakdown.
At what mileage does the body typically fail?
Based on the 14 complaints filed, body issues most often appear around 48,022 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $1,500 for body repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to body?
No active recalls currently cover body issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Ford/Mustang.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.