The 2024 Tundra engine failures break down into two categories: catastrophic stalls from debris-contaminated bearings, and drivability problems with no clear root cause.
The debris issue is the most serious. Owners report sudden, complete engine shutdown at highway speeds—typically 50–70 MPH—with no warning lights beforehand. The truck then refuses to restart. Metal shavings turn up in the oil pan when dealers tear down the engine. Toyota issued Recall 25V767000 in November 2025 for 2022–2024 non-hybrid models, acknowledging that manufacturing debris left in the engine can destroy main bearings and cause catastrophic failure. But as of early 2026, the recall remedy isn't available yet—parts could take 8 months or more. Owners are stuck with trucks parked at dealerships, unsafe to drive, with no loaner cars and trade-in values crushed by the recall flag.
Separately, many owners describe throttle lag: a 3–5 second delay when pressing the gas from a stop, or complete loss of power at highway speed before the engine suddenly surges. This happens with no warning codes stored in the computer, and dealers say they can't diagnose or fix it. A few owners also report rough idle, misfires, low oil warnings with no visible leaks, and engine knocking that precedes catastrophic failure.
A notable gap: 2024 Tundra i-FORCE MAX hybrid models have the identical engine but are excluded from the recall. Toyota claims the hybrid battery and motor provide a safety backup. Owners dispute this—they report that engine failure triggers a "Hybrid System Malfunction" message and renders the vehicle completely inoperable.
Failure modes owners describe
Engine Stall / Loss of Motive Power (Debris-Related)
Catastrophic engine failure caused by manufacturing debris (metal shavings) contaminating crankshaft main bearings, leading to sudden bearing and engine seizure at highway speeds without warning. Owners report complete engine shutdown, inability to restart, and forced emergency stops. Affects primarily 2022–2024 non-hybrid models under NHTSA Recall 25V767; 2024 hybrid models excluded despite identical V35A engine architecture.
When: Mileage varies: 4,596 to 47,698 miles reported; some within first 6 weeks of ownership
Symptoms owners cite: Sudden complete engine shutdown at highway speed (50–70 MPH typical); Loss of motive power without warning; Message 'Engine Stopped' or 'Engine Shut Off - Pull Over' displayed; Vehicle fails to restart after shutdown; Loud knocking/clanking noise from lower engine before failure; Metal shavings found in oil pan during diagnosis
Codes mentioned: Metal debris in engine confirmed by dealer inspection, Front/main bearing failure diagnosed
Repairs/costs cited: Engine replacement required; some dealers initially offer short-block rebuild only. One owner cited ~$25k cost for replacement; another reported engine rebuild in progress. Delay in parts availability (8+ months stated in some cases) leaves vehicles undrivable.
Recalls/TSBs owners mention: NHTSA Recall 25V767000 (issued May 2024, expanded November 2025) applies to 2022–2024 non-hybrid Tundra and certain LX/GX models. Remedy 'not yet available' as of late 2025/early 2026. Toyota initially rebuilt/patched 2024 engines rather than replacing; warranty denials reported for some owners using non-OEM filters. Hybrid models (2024 i-FORCE MAX) excluded from recall despite identical engine; Toyota claims hybrid electric motor provides safety backup (claim disputed by owners and unsupported in incident reports).
Throttle Lag / Hesitation on Acceleration
Intermittent delay or complete loss of throttle response when driver applies accelerator from a stop or at highway speeds. Vehicle may hesitate 3–5 seconds, fail to accelerate, or exhibit abrupt surge. Occurs with no warning lights. Creates hazardous situations during lane changes, intersection crossings, and merging.
When: Reported at low mileage (7,278 to 36,500 miles); some occurring within first months of ownership
Symptoms owners cite: Delayed throttle response when pressing accelerator (3–5 second lag typical); Vehicle fails to accelerate on demand from complete stop; Intermittent loss of power while accelerating at highway speed; Abrupt surge or 'rocket' acceleration after lag; Vehicle slows down momentarily when throttle applied; Hesitation worse when vehicle is warm; No warning lights illuminated; dealer unable to replicate
Codes mentioned: No stored diagnostic trouble codes in many cases; computer diagnostics negative
Repairs/costs cited: Most dealers unable to diagnose or repair because condition is intermittent and no codes are stored. One dealer stated 'there is a known issue with no current fix.' Owners report continuing to drive with the defect; no permanent repair has been documented in these narratives.
Recalls/TSBs owners mention: Toyota has not issued a recall or technical service bulletin specifically for throttle lag on 2024 Tundra. One dealer acknowledged the issue as 'known' but stated no fix is available. Software updates have been attempted with no resolution reported. No warranty remedy or interim guidance provided to owners.
Engine Rough Idle / Misfire / Running Rough
Engine runs rough at idle, exhibits hesitation on start, or misfires on one or more cylinders. Symptoms include engine difficulty starting, rough idle quality, and occasional stalling. Some cases linked to piston scoring or bearing contamination; others remain undiagnosed.
When: Reported between 9,229 and 36,500 miles; one case at 69,279 miles
Symptoms owners cite: Rough idle after cold start; Difficulty starting vehicle or slow-crank condition; Engine running rough while idling; Misfire on specific cylinder (e.g., cylinder 3, cylinder 5); Engine hesitation or stumbling on acceleration; Occasional stalling for no apparent reason
Codes mentioned: Misfire on cylinder 3 (P0303 range implied), Misfire on cylinder 5 (P0305 range implied)
Repairs/costs cited: One owner's piston was found to have score marking; piston replaced under warranty. Another owner's engine disassembled by dealer and found main bearing failure; repair in progress. In other cases, no repair attempted or parts not available.
Recalls/TSBs owners mention: One piston replacement covered under factory warranty. Main bearing failures traced to manufacturing debris per recall 25V767. For cases outside recall scope, warranty coverage varies; one owner denied coverage when extended warranty not purchased.
Low Oil / Oil Starvation / Excessive Blow-by
Engine exhibits rapid oil loss or oil starvation despite no visible leaks. Low oil warning light illuminates prematurely or repeatedly. In some cases, excessive blow-by observed with oil visible on engine block. Rod bearings and engine failure result from insufficient lubrication.
When: Reported as early as 2,000 miles (one new lease) and up to 69,279 miles
Symptoms owners cite: Low oil warning light illuminated repeatedly within short time; Oil level drops 4.5–4.7 quarts from 7.7-quart capacity in weeks; Visible oil on engine block; Excessive blow-by reported; Engine seizure or failure due to oil starvation; Metal shavings in oil pan indicating bearing/engine wear
Codes mentioned: Oil starvation confirmed by dealer diagnostic
Repairs/costs cited: One owner denied warranty coverage (~$25k cost) because aftermarket (non-Toyota) filter was used, despite filter being correct type. Dealer added oil as temporary fix and advised monitoring. Engine rebuild or replacement required in cases of starvation-induced failure.
Recalls/TSBs owners mention: One warranty denial based on non-OEM filter use despite correct aftermarket part. No recall issued for oil-loss defect. Toyota engineer evaluation pending in one case. No interim guidance or replacement program offered.
Engine Stall / Power Loss Under Acceleration or at Intersections
Vehicle stalls unexpectedly during intersection crossings, merging, or acceleration without warning. Engine may shut down and fail to restart; vehicle forced to coast to shoulder. Distinct from debris-related stalls in that some cases show no visible bearing damage and present diagnostic challenges.
When: Reported at low mileage (10–15 MPH to highway speeds); one case at 36,500 miles
Symptoms owners cite: Vehicle stalls at traffic signal or intersection; Engine shuts off with no warning lights; Complete loss of motive power requiring emergency coast to shoulder; Vehicle hesitates and fails to accelerate from stop; No check engine light or warning before stall; Power steering may become difficult to operate during event
Codes mentioned: Check engine light illuminated in some cases after stall, Unknown diagnostic codes in some cases
Repairs/costs cited: Dealers unable to replicate or diagnose in several cases; vehicle returned unrepaired. In recall-related cases, engine replacement needed but parts unavailable. No repair completed in reported narratives for non-debris-related stalls.
Recalls/TSBs owners mention: Dealers directed owners to wait for corporate instruction and Toyota Assistance Service (TAS) guidance. No diagnosis or repair offered when condition could not be replicated. Recall 25V767 cited when metal debris confirmed, but remedy not yet available.
Engine Knocking / Clanking / Grinding Noise
Abnormally loud knocking, clanking, or grinding sound originating from engine lower end. Often precedes or accompanies stalling or catastrophic failure. Consistent with main bearing failure or crankshaft damage from debris contamination.
When: Reported at 4,596 to 47,698 miles
Symptoms owners cite: Loud knocking sound from engine; Grinding or clanking noise from lower engine end; Noise increases with engine load or acceleration; Knocking persists and escalates after first occurrence; Engine stalls shortly after knocking begins
Codes mentioned: Failed crankcase diagnosed; metal shavings in oil pan
Repairs/costs cited: One dealer blamed pre-existing flood damage despite no flood history. Another dealer confirmed crankshaft failure. Engine replacement required; one short-block rebuild offered instead of long-block replacement.
Recalls/TSBs owners mention: Knocking symptom recognized as indicator of bearing/crankshaft failure under Recall 25V767. One dealer denied warranty claiming flood damage with no evidence. Most cases referred for engine replacement but repair not completed due to parts unavailability.
Recall Delay and Parts Unavailability (25V767000)
NHTSA Recall 25V767000 (ENGINE AND ENGINE COOLING) issued November 6, 2025, for 2022–2024 non-hybrid Tundra models with V35A engine. Remedy listed as 'not yet available' as of early 2026. Owners report 4–8+ month wait with no repair possible, no loaner vehicles in many cases, and no interim safety guidance. Vehicles considered unsafe to drive pending remedy availability.
When: Recall issued November 6, 2025; complaints filed through early 2026
Symptoms owners cite: Recall notification letter received; Parts not available from dealership or manufacturer; Owners informed remedy could take 8+ months; Vehicle left unrepaired at dealership for weeks; Dealers unable to perform recall repair without parts; Owners anxious about driving vehicle with known defect
Codes mentioned: NHTSA Campaign Number 25V767000
Repairs/costs cited: No repair completed in any reported narrative. Vehicles remain at dealerships waiting for parts. One owner reported truck ticking and not running right with no remedy available.
Recalls/TSBs owners mention: NHTSA Recall 25V767000 issued but remedy not yet available. Toyota stated parts could take eight months or more. Interim notification letters mailed December 16, 2025, with final remedy to follow. No interim safety guidance, loaner vehicles, or expedited parts program reported. One owner's trade-in value reduced $10k due to recall status.
Hybrid i-FORCE MAX Exclusion from Recall (Safety Concern)
2024 Tundra i-FORCE MAX hybrid models equipped with identical V35A 3.4L twin-turbo engine excluded from Recall 25V767 despite harboring the same manufacturing-debris defect. Toyota claims hybrid electric motor provides safety backup; however, owners report that engine seizure renders hybrid system inoperable and vehicle unsafe. Owners assert exclusion is technically unjustified and creates unequal safety protection.
When: Build dates 2023–2024; complaint filed November 6, 2025 and later
Symptoms owners cite: Same engine as recalled non-hybrid models; Debris contamination risk identical to non-hybrid; Owners report hybrid system malfunction when engine fails; Vehicle becomes completely inoperable upon engine seizure; Hybrid system cannot provide power when main engine disabled by debris damage
Codes mentioned: V35A 3.4L twin-turbo engine architecture identical to recalled units
Repairs/costs cited: One hybrid owner reported receiving short-block rebuild offer instead of long-block replacement (contrast to non-hybrid recall remedy). No evidence of hybrid motor providing motive power during catastrophic engine failure in owner reports.
Recalls/TSBs owners mention: Toyota has not included 2024 Tundra i-FORCE MAX hybrid vehicles in Recall 25V767, citing the presence of hybrid electric motor as a safety backup. Hybrid owners offered short-block rebuild rather than full engine replacement. Owners and consumer advocates have urged NHTSA to investigate and expand recall to include hybrid models.
Synthesized from 83 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.