Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low.
full bulletin at NHTSA ↗2018 Toyota Tacoma electrical problems
moderate 13 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
13
Recalls
0
Avg fix
$850
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical 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.
Customers have expressed concerns about the performance of Qi Wireless Chargers. Wireless chargers on applicable vehicles are designed to work with Qi Certified devices only. MagSafe devices, that are not Qi Certified, may not charge as expected with Qi Wireless Chargers.
full bulletin at NHTSA ↗Customers have expressed concerns about the performance of Qi Wireless Chargers. Wireless chargers on applicable vehicles are designed to work with Qi Certified devices only. MagSafe devices, that are not Qi Certified, may not charge as expected with Qi Wireless Chargers.
full bulletin at NHTSA ↗TSB: All 2020 ? 2023 model year 4Runner, 2018 ? 2022 model year Sequoia, 2018 ? 2023 model year Tacoma, and 2018 ? 2021 model year Tundra vehicles are equipped with Pre-collision System (PCS) and Dynamic Radar Cruise Control (DRCC) as part of the Toyota Safety Sense (TSS) package. The PCS and DRCC systems are designed to help mitigate a potential collision and maintain a pre-determined traveling distance. It is recommended to disable the PCS and DRCC systems on vehicles that have been modified (ride height, oversized wheels/tires, brush bars, etc.) in a way that potentially disrupts the functionality of these systems. Vehicle owner?s written consent is required before performing the calibrat
full bulletin at NHTSA ↗TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners describe a range of electrical gremlins. The seat belt indicator chimes malfunction and distract drivers; dealers have the ability to disable them but often refuse. One owner reports the hood won't open after battery failure—dealer confirmed hood bumpers easily drift out of adjustment, a design flaw that prevents access in emergencies like fuel leaks.
Engine control issues include the fuel pump running on its own with the truck off and locked, stalling on acceleration and reversal that requires multiple start attempts, and multiple button failures (traction control, differential). The radio cuts out randomly and Bluetooth calls drop, a problem present since purchase that dealer tests haven't fixed; at 37,000 miles the owner is told replacement is out of warranty.
The wireless charging pad gets hot even at rest, bubbles, and peels away—the same failure recurred after a previous replacement, and the dealer acknowledged seeing this on many 2018 Tacomas. Pre-collision warnings fire without vehicles nearby, creating potential hazard, and cannot be disabled. One owner reports the master cylinder leaking brake fluid into the cab and harness—a fire risk. Another found eleven soy-coated wires chewed by rodents, disabling the fob, A/C, and a headlight. Odometer fraud complaints also appear in this cluster, though they reflect purchase issues rather than vehicle electrical defects.
Same Toyota Tacoma electrical reports on nearby years: 2016 · 2017 · 2019
Failure modes owners describe
Seat Belt Indicator and Audio Alert Malfunction
Optional seat belt indicator chimes malfunction and produce prolonged audio that distracts the driver and interferes with other safety features like reverse sensors. Toyota dealers have discretion to disable the optional chimes but many refuse to do so per customer requests.
Symptoms owners cite: Prolonged, unwanted chiming from optional seat belt alert system; Audio distraction interferes with driver's ability to hear or focus on other safety features; Seat belt sensor malfunction combined with optional alert system failure
Repairs/costs cited: Dealers can disable the optional chimes but discretion left to dealer, not driver; some dealers refuse to perform this adjustment despite customer requests
Hood Latch Design Defect — Hood Bumpers Out of Adjustment
Hood bumpers easily go out of adjustment, preventing the hood from opening. This occurred after a battery failure; neither owner nor tow operator could open the hood. Dealer confirmed this is a design defect where bumpers have excessive adjustment range and easily drift out of position.
Symptoms owners cite: Hood cannot be opened or opened only with difficulty; Hood bumpers are visibly out of adjustment
Repairs/costs cited: Dealer employee confirmed design defect in hood bumpers; bumpers need readjustment but design allows excessive movement and poor retention
Fuel Pump Runs When Vehicle Is Off
Fuel pump runs on its own while the vehicle is locked with no keys inserted. Occurs unpredictably and may indicate electrical control module malfunction.
When: Recently noticed; timing varies
Symptoms owners cite: Fuel pump audibly running while vehicle is off and locked; No keys in ignition
Multiple Control Button Failures — Traction Control and Differential
Traction control button and differential engagement button no longer function. Started at different times independently from other electrical issues.
When: Traction control failure recently noted; differential button failure recently noted; different from stalling issue which started 4 months prior
Symptoms owners cite: Traction control button does not work; Differential button does not engage the differential when pushed
Engine Stalling and Hard Starting
Vehicle stalls frequently during forward and reverse operation. Requires 3–4 ignition cycles to start. Started approximately 4 months before report. Owner initially attributed to break-in but issue persists and is now occurring almost every time when backing up or going forward.
When: Approximately 4 months before report
Symptoms owners cite: Frequent stalling during forward and reverse driving; Rough idle; Requires multiple ignition attempts (3–4 times) before engine starts
Radio Cuts Off and Bluetooth Disconnections
Radio randomly cuts off and takes extended time to restore power. Bluetooth calls drop and phone disconnects mid-call without reconnecting. Issue present since purchase. Dealer has run tests at multiple service visits (5,000-mile intervals) but never resolved it. At 37,000 miles, dealer stated radio is out of warranty and replacement required at owner expense.
When: Since purchase; still occurring at 37,000 miles
Symptoms owners cite: Radio randomly powers off; Prolonged delay before radio powers back on; Bluetooth calls disconnect mid-call; Phone disconnects and fails to reconnect automatically
Repairs/costs cited: Dealer states radio replacement needed at owner cost (not covered after 37,000 miles); dealer has run unspecified tests multiple times without resolving issue
Wireless Charging Pad Overheating and Delamination
IQ wireless charging pad gets excessively hot, bubbles, and dislodges from its mounting location. Same failure occurred after previous replacement in February 2020. Dealer confirmed seeing the same problem on many other vehicles. Charging pad overheats even when not in active use.
When: Pad replaced February 2020 for same issue; recurring after previous replacement
Symptoms owners cite: Charging pad excessive heat generation; Pad surface bubbles and warps; Pad dislodges from mounting position; Heat generation occurs even when pad is not charging
Repairs/costs cited: Pad replaced once (Feb 2020); recurred; dealer acknowledged seeing same failure on multiple other 2018 Tacomas
Recalls/TSBs owners mention: Toyota customer care stated vehicle is out of warranty and 'nothing we can do about the issue'; acknowledged as ongoing issue by service personnel but no recall or service bulletin offered
Pre-Collision System False Activations
Pre-collision warning system activates unexpectedly when no vehicle is in close proximity. System triggers warning, audible beeping, and red blinking dashboard lights. One occurrence caused driver to jump at 40 mph on empty country road; potential for loss of control in congested or highway conditions. System cannot be disabled by driver.
When: Around 3,000 miles; also reported at 40 mph on country road with no traffic
Symptoms owners cite: Pre-collision warning light and beeping activate without nearby vehicles; Red blinking lights on dashboard; Brake warning messages appear; Lane assist warning light inoperable
Repairs/costs cited: Dealer unable to retrieve fault codes or duplicate failure; vehicle not repaired
Recalls/TSBs owners mention: Manufacturer was contacted but no resolution offered
Pre-Collision System Malfunction — Loss of Power and Cluster Blinking
Dashboard displays 'Pre-Collision System Malfunction' message, followed by loss of power in the system and blinking lights in the instrument cluster.
Symptoms owners cite: Pre-Collision System Malfunction message displayed; Loss of power in pre-collision system; Instrument cluster blinking lights
Brake Fluid Leak from Master Cylinder into Cab
Master cylinder leaks brake fluid into the vehicle's interior cab, dripping behind the brake pedal. Brake fluid has also contaminated the wiring harness connected to the brake switch. This creates a known fire hazard.
Symptoms owners cite: Brake fluid visible dripping inside cab behind brake pedal; Brake fluid pooling in wiring harness to brake switch; Brake fluid contamination of electrical components
Soy-Coated Wire Insulation Consumed by Rodents
Rodents chewed through eleven wires coated with soy-based insulation. Affected wires supply power to the key fob, air conditioning system, and one headlight. Owner questions why soy-based material was engineered into the electrical system.
Symptoms owners cite: Multiple wires with soy-based coating chewed through by rodents; Fob inoperative due to wire damage; Air conditioning inoperative due to wire damage; Headlight inoperative due to wire damage
Recalls/TSBs owners mention: Toyota stated 'nothing they could do' when contacted about the issue
Synthesized from 13 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Display a message in screen "Pre-Collision System Malfunction", lost power and start blinking light in cluster
IQ wireless charging pad gets hot pad has bubbled and dislodged from its place. Pad was replaced already for the same issue in Feb-2020. Now the same issue is recurring. The dealer said they had seen many more vehicles with the same problem. Charging pad gets hot when not in use. I contacted Toyota customer care to report and ask for advice, and they just said thank you for your feedback…
Had electrical trouble with your 2018 Toyota Tacoma?
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 electrical problem on the 2018 Toyota Tacoma?
It's a documented issue but not catastrophic. 13 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 13 complaints filed, electrical issues most often appear around 57,429 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 $850 for electrical 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 electrical?
No active recalls currently cover electrical 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/Toyota/Tacoma.
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.