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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Short answer: it has not earned that title yet. Toyota’s 3.4-liter twin-turbo V6 is powerful, sophisticated, and capable of producing up to 437 horsepower and 583 lb.-ft. of torque in i-FORCE MAX form. But certain early V35A-family engines in third-generation Tundras were involved in serious U.S. safety recalls linked to manufacturing debris, main-bearing wear, stalling, and potential loss of motive power.
The available evidence supports a more measured verdict: Toyota built an impressive modern truck powertrain, then had to address a significant production-quality problem. Later manufacturing changes and improved bearings may reduce the risk, but there is not yet enough independent long-term failure data to call this the most reliable truck engine.
The reliability claim does not match the evidence yet
“Most reliable truck engine” is a comparative claim. To establish it, the 3.4-liter V6 would need to outperform competing engines across comparable mileage, operating conditions, repair rates, warranty claims, and fleet use over many years.
That evidence is not currently available. The strongest reliability information is instead Toyota’s own recall documentation and U.S. National Highway Traffic Safety Administration filings. Those records document a real and potentially dangerous failure mode in certain engines, but they do not establish that every V35A engine will fail—or that every later engine is either affected or proven problem-free.
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The distinction matters. A recall population is not the same thing as the number of engines that actually failed. At the same time, a manufacturing-related defect involving a component as important as a crankshaft main bearing is too serious to dismiss as ordinary internet negativity.
What Toyota’s 3.4-liter V6 is
Toyota introduced the new twin-turbo V6 powertrain family with the third-generation Tundra for the 2022 model year. The engine belongs to Toyota’s V35A family and is also used in certain related Lexus products. In the Tundra, it is offered in two primary forms:
| Powertrain | Maximum output | Configuration |
|---|---|---|
| i-FORCE | 389 horsepower and 479 lb.-ft. of torque | 3.4-liter twin-turbo V6 paired with a 10-speed automatic transmission |
| i-FORCE MAX | 437 horsepower and 583 lb.-ft. of torque | Twin-turbo V6 with an electric motor-generator integrated between the engine and 10-speed automatic transmission |
Those are maximum published figures; exact output and equipment can vary by configuration. Toyota’s 2026 Tundra specifications continue to list these same headline outputs for the standard and hybrid powertrains.
The engine’s clear strengths are its broad torque delivery, compact forced-induction design, towing capability, and the way the hybrid system adds electric torque without requiring a separate conventional transmission. Toyota advertises a maximum Tundra towing capacity of 12,000 pounds in properly equipped configurations.
That towing number demonstrates capability, not durability. An engine can produce strong torque and tow a heavy trailer while still having a manufacturing defect that affects a limited production population. Performance specifications and reliability statistics answer different questions.
Why buyers expected Toyota-level reliability
The expectations were understandable. Toyota has spent decades building a reputation for durable trucks and SUVs, and earlier Tundra engines gave many buyers confidence that the next generation would be similarly dependable. Toyota also has mature global manufacturing systems and extensive experience building high-volume powertrains.
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The new V6 appeared to fit that history while addressing modern market demands. Turbocharging allowed Toyota to deliver V8-like truck torque from a smaller engine, while the i-FORCE MAX system used electric assistance to increase low-speed response and total output. Toyota’s launch messaging emphasized power, efficiency, towing, and integrated hybrid engineering.
But a new engine family cannot inherit decades of reliability evidence from its manufacturer or predecessor. Its seals, bearings, turbos, cooling system, control software, and assembly processes need years of real-world exposure before owners can fairly judge high-mileage durability. Brand reputation creates a reasonable expectation; it does not prove the result.
The documented problem: debris and main-bearing damage
The core issue described in the recall records is manufacturing debris left in the engine during production. That debris could contaminate the engine’s internal components, including the crankshaft main bearings.
Main bearings support the crankshaft inside the engine. If contamination causes abnormal wear, the engine can develop a knocking noise, run roughly, fail to start, stall, or lose motive power. Toyota’s later filing describes a condition in which certain V35A crankshaft main bearings could allow crankshaft rotation within the engine assembly while the engine was running.
These outcomes are not merely expensive repair scenarios. A stall or loss of drive power can create a safety hazard, particularly when a truck is towing, merging into traffic, or traveling at highway speed.
The wording also points to a production-quality problem rather than proof that every twin-turbo V6 has an inherently defective architecture. The evidence supports concern about specific engines and production periods. It does not support the broader claim that the entire V35A design is guaranteed to fail.
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Recall timeline: what the U.S. records show
| Date and record | Vehicles or engines described | Documented risk and response |
|---|---|---|
| May 2024 Toyota recall notice | Approximately 98,600 Tundras built from early November 2021 through mid-February 2023; certain 2022–2023 trucks | Machining debris might remain in the engine and lead to knocking, rough running, no-start conditions, or loss of motive power. Toyota planned engine-assembly replacement at no charge. The Tundra hybrid was not included in that specific campaign. |
| NHTSA recall 25V767, submitted November 2025 | Certain 2022–2024 Tundras; 113,079 potentially involved Tundras in the filing and 126,691 vehicles across the affected Toyota and Lexus populations | The filing describes possible crankshaft main-bearing failure associated with manufacturing debris, with possible knocking, rough running, no-start conditions, stalling, and loss of drive power. |
The later filing is important because it broadens the documented production story beyond the first campaign. Toyota stated that some engines made after the earlier affected period used improved manufacturing processes but remained under investigation. Other engines were produced with an improved main bearing.
That is evidence of a manufacturing response and a design or component change. It is not the same as a statistically validated proof that all later engines are trouble-free. The filing does not justify declaring every 2024, 2025, or 2026 Tundra affected, nor does it justify declaring every later truck immune.
For current campaign details, owners should use the official Toyota Tundra recall check and the NHTSA recall database. A vehicle identification number is more useful than a model-year label because production date, engine configuration, prior repairs, and campaign completion all matter.
How the later recall remedy works
The later remedy is not a bottle of additive, an oil change, or an aftermarket protection device. It is dealer-performed recall work.
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Toyota’s remedy uses inspection software to evaluate the number-one main bearing and collect available vehicle-drive data. If the software cannot confirm that the bearing will remain free from abnormal wear associated with the issue, the dealer is instructed to replace the engine. The remedy is provided without charge to eligible vehicles.
Recall materials also identify “do not drive” and “park outside” advisories. Those instructions can depend on the particular campaign and vehicle status, so an owner should follow the notice associated with the VIN rather than applying a generic rule to every Tundra. If the truck is knocking, running roughly, stalling, refusing to start, or displaying a serious powertrain warning, stop operating it when safe and contact Toyota or roadside assistance.
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An engine replaced through the recall is a meaningful resolution for the affected assembly. However, buyers should still obtain the repair order and determine what was replaced, when it was replaced, and whether the work was completed under the applicable campaign. Replacement removes the original assembly from the vehicle; it does not create a long-term reliability study for the engine family.
What changed in later production?
The recall information describes two relevant responses:
- Improved manufacturing processes: Some engines produced after the earlier affected period were built using processes intended to reduce the chance of machining debris remaining in the engine.
- An improved main bearing: Other engines were produced with a revised or improved main-bearing component.
Both changes are encouraging. A cleaner manufacturing process directly addresses contamination, while an improved bearing may increase resistance to abnormal wear. But the available material does not establish the exact long-term failure rate of each production revision.
There is also no sound basis for assuming that the standard i-FORCE and i-FORCE MAX versions have identical risk simply because they share the V35A family. Conversely, the fact that the hybrid was excluded from the initial 2024 campaign does not automatically determine whether a particular hybrid is included in a later campaign. The VIN and the applicable recall notice control.
What used-truck buyers should check before purchasing
A model-year shortcut is not enough. Use this process for any potentially affected Tundra, especially a 2022–2024 truck.
- Run the VIN through both official recall systems. Check Toyota’s recall site and NHTSA’s database. Look for open campaigns, completed campaigns, and instructions that require dealer contact.
- Ask for the complete service history. A seller’s statement that “the recall was done” is not a substitute for a dealer repair order. Look for the campaign number, repair date, mileage, dealer, and whether the engine was inspected or replaced.
- Confirm whether the current engine is original. If the engine was replaced, ask for the replacement documentation and any available part or assembly information. A replacement engine can change the risk assessment, but the paperwork should establish what actually happened.
- Do not infer status from the model year. Two trucks with the same model year may have different build dates, engines, recall histories, or production revisions. A 2024 truck is not automatically included, and it is not automatically cleared.
- Listen and observe during a cautious inspection. Knocking, persistent rough running, difficult starting, stalling, or unexplained power loss deserve immediate attention. Do not continue a test drive simply to see whether symptoms become worse.
- Use an independent inspection for the rest of the truck. A mechanic can assess general condition, leaks, maintenance quality, drivetrain behavior, and signs of prior repair. However, a normal used-truck inspection cannot certify that a recall-related main bearing will never fail.
- Make the purchase conditional on unresolved recall work. If a campaign is open, have Toyota confirm the remedy path before buying. Do not assume the seller’s price reduction compensates for a potentially disabled truck or a delayed engine replacement.
What current owners should do
1. Check the VIN, not just online discussions
Owner forums and social-media reports can reveal symptoms, but they cannot determine campaign eligibility. Use the vehicle’s VIN and retain screenshots or dealer communications showing the current recall status.
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- EXTENDED LIFE 18K: K&N Advantage Plus Air Filter provides 50% longer life compared to standard 12,000-mile filters.
- SUPERIOR FILTRATION & PROTECTION: K&N uses a premium filter media that provides up to 99% efficiency to protect your engine.
- REPLACE EVERY 18K Miles: Engine air filter only needs to be replaced every 18,000 Miles under normal highway driving conditions (1.5 years based on the average miles driven per year of 12,000 miles)
- NO-HASSLE WARRANTY: 1-Year Limited Warranty.
2. Treat symptoms as mechanical warnings
A scanner code is not required for a bearing problem to be serious. Knocking, rough running, a no-start condition, stalling, and loss of power should be reported to Toyota. If the recall notice says not to drive the vehicle, arrange the approved transport or towing procedure instead of driving to the dealership.
3. Keep model-specific maintenance information
A model-year-specific Toyota Tundra owner’s manual is useful for warning indicators, operating procedures, fluid requirements, maintenance intervals, and differences between standard and hybrid powertrains. Toyota’s owner-information materials identify downloadable manuals and explain that printed copies can be purchased through Helm. The manual is a reference, not a recall remedy, and it cannot determine whether a main bearing is affected.
4. Understand the limited role of a scanner
An OBD-II diagnostic scanner can help an owner or technician read stored powertrain codes and document warning-light behavior. It cannot clear a safety recall, inspect the number-one main bearing, validate Toyota’s software inspection, or prove that an engine is safe. Do not let a clean scan override an open recall or abnormal mechanical noise.
5. Follow the correct maintenance schedule
Routine oil and filter service remains important for turbocharged engines, but it does not remove machining debris that was left inside an engine during production and it does not repair a worn main bearing. Use the exact oil grade, filter, capacity, and interval specified for the truck’s model year and powertrain. Do not treat additives, magnetic drain plugs, aftermarket oil coolers, or generic “engine protection” products as solutions to the recalled condition.
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What the recalls do—and do not—prove
| The evidence supports | The evidence does not support |
|---|---|
| The V6 delivers strong output and torque, exceeding many naturally aspirated V8 truck engines on published figures. | That it is the most reliable truck engine on the market. |
| The i-FORCE MAX hybrid system is a technically distinctive way to add electric torque and increase total output. | That hybrid or non-hybrid versions are universally more or less reliable without comparable data. |
| Certain V35A engines were subject to serious manufacturing-related recalls. | That every 3.4-liter twin-turbo V6 will fail. |
| The failure can produce knocking, rough running, no-start conditions, stalling, or loss of motive power. | That every truck from a particular model year is included or excluded. |
| Toyota responded with inspection and, where required, no-charge engine replacement. | That an engine replacement automatically proves the replacement design’s long-term reliability. |
| Later production changes and improved bearings may reduce the risk. | That those changes have already been validated by a statistically robust, independent high-mileage study. |
The measured verdict
Toyota’s 3.4-liter twin-turbo V6 became a benchmark for output and truck capability, not yet for proven durability. Its 389-horsepower standard form, 437-horsepower i-FORCE MAX version, high torque, hybrid integration, and 12,000-pound maximum towing rating explain why buyers expected it to be exceptional.
The early manufacturing-related recalls explain why the reliability title is premature. The most responsible assessment is that the V35A is an impressive but still developing truck engine family with a documented production problem in certain vehicles and an evolving remedy. Later builds may ultimately establish a strong reliability record, but that conclusion requires years of field data—not just Toyota’s reputation, a high output number, or the absence of a recall on one VIN.
Frequently Asked Questions
Are all 2022–2024 Toyota Tundras affected by the engine recall?
No. The recalls cover specific vehicles and engines, not every Tundra from those model years. Build date, engine configuration, VIN status, previous engine replacement, and campaign completion all matter. Check the VIN through Toyota and NHTSA.
Was the Tundra hybrid included in the first engine recall?
Toyota’s May 2024 notice stated that the Tundra hybrid was not included in that specific campaign. That does not automatically determine eligibility under later filings, so hybrid owners should check their VIN rather than generalize from the first recall.
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It resolves the affected engine assembly when Toyota determines replacement is required, but it does not establish a statistically proven long-term failure rate for the replacement engine or the entire V35A family. Keep the dealer’s repair documentation and continue following the model-specific maintenance schedule.
Can an OBD-II scanner detect the Toyota Tundra bearing problem?
A scanner may read stored powertrain codes, but it cannot certify main-bearing condition, determine recall eligibility, or replace Toyota’s dealer inspection. Mechanical symptoms and the official VIN recall status should take priority over a clean scan.
The Bottom Line
Bottom line: Toyota’s 3.4-liter twin-turbo V6 is powerful and technically ambitious, but the documented V35A manufacturing-related recalls prevent an honest “most reliable truck engine” verdict today. Check the VIN, verify recall completion and any engine replacement in writing, and treat later production improvements as promising—not yet conclusive—evidence.
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