Purchased the vehicle in June 2021 only had 1 previous owner. The dealership stated it was a pre-owned certified used vehicle that had just been inspected and service. Within the first month I had to take it back for multiple issues most recently the catalytic converter to be replaced and the Engine. I haven't even owned it let alone driven it long or far enough for either of these parts to need…
2019 Hyundai Tucson powertrain problems
severe 39 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
39
Recalls
0
Avg fix
$2,500
1crash
1fire
What stands out
Owners have filed 39 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA powertrain complaint has been filed on this vehicle in over 4 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: A 2019 Tucson with this powertrain carries substantial risk of engine bearing failure, oil burning, transmission hesitation, and repeated catalytic converter damage—sometimes catastrophically and without warning. Verify full maintenance records, demand in-person inspection of engine condition and oil consumption, and negotiate warranty explicitly covering bearing/oil-burn defects before purchase.
The 2019 Hyundai Tucson powertrain shows a pattern of severe, interconnected defects tied primarily to the Theta engine and its management systems. Owners report connecting rod bearing failure causing sudden engine seizure and loss of power mid-highway, sometimes with no warning lights beforehand. One vehicle caught fire after oil burned into the combustion chamber. Engine failures occur as early as 9,000 miles through 70,000+ miles.
Excessive internal oil burning is universal among failing units—owners add oil every 2–3 days in severe cases despite no visible leaks. This internal burning damages catalytic converters (many replaced 2–3 times in under 3 years), intake manifolds, and other engine components. Dealers use 1,000-mile oil-consumption tests to defer repairs rather than diagnose the root cause.
Transmission hesitation and power loss occur from complete stops and on highway merges starting as early as 3,500 miles. Dealers tell owners this behavior is "normal" and the transmission will "learn" driving habits—a claim contradicted by persistent problems across multiple vehicles and 18+ months of ownership. Knock sensor failures repeat even after manufacturer replacement under class-action mandate, limiting engine speed to 10–20 mph without warning—a genuine highway hazard.
Warranty denials are common: Hyundai cites incomplete maintenance records (despite factory-recommended service), mileage overage, or refuses to perform required Campaign 966 diagnostics without charging diagnostic fees. Extended 150,000-mile/15-year warranties are advertised but frequently denied.
Same Hyundai Tucson powertrain reports on nearby years: 2016 · 2017 · 2018 · 2022
Failure modes owners describe
Engine bearing failure (connecting rod)
Owners report connecting rod bearing collapse causing sudden engine seizure, loss of power, and complete mechanical failure on highway at speed. Multiple complaints cite the Theta engine defect linked to class-action litigation.
When: Varies; one at 9,000 miles; 62,768 miles; 70,000+ miles common; some catastrophic failures early
Symptoms owners cite: Engine seizing mid-drive; Sudden loss of acceleration; Gray or white smoke from hood; Engine fire or flames; Clunking/knocking noise from engine; No warning lights before catastrophic failure
Codes mentioned: P1326 (connecting rod bearing knock sensor detection), P000B (camshaft ignition control)
Repairs/costs cited: Engine replacement required; labor costs extend into thousands; replacement engines installed July 2025 per complaint #1; some replacements still manifest transmission issues afterward
Recalls/TSBs owners mention: Class-action lawsuit pending; Campaign 966 (engine knock sensor detection system) mandated but dealer compliance inconsistent; extended 150,000-mile/15-year warranty cited in multiple complaints but Hyundai denies coverage citing incomplete maintenance records or mileage overage
Excessive internal oil consumption
Owners report rapid oil loss (burning 0.5–2+ quarts between services) with no external leaks. Internal burning damages catalytic converter, intake manifold, and engine internals. Dealer oil-consumption tests (1,000-mile cycle) used to defer repairs rather than diagnose root cause.
When: Ranges from 9,000 miles onward; oil level drops every 2 days in extreme cases
Symptoms owners cite: Oil level drops rapidly between changes; No visible external leaks; Gray smoke or exhaust fumes in cabin; Intake manifold residue buildup; Check engine light (P0420 catalyst efficiency codes); Nausea/dizziness from exhaust fumes entering AC vents
Codes mentioned: P0420 (catalyst system efficiency below threshold), P000B (camshaft ignition control)
Repairs/costs cited: Catalytic converter replacement (multiple times—some owners replaced 2–3 times); intake manifold replacement; fuel pump seal, head gasket, oil pan seal repairs cited; partial warranty coverage denied after 100,000 miles or 5 years; $2,400–$5,000 quoted for full repairs out-of-pocket
Recalls/TSBs owners mention: Campaign 966 diagnostics (bearing inspection, knock sensor detection system verification, oil-consumption test) required but dealers charge diagnostic fees or refuse to perform; Hyundai covers 50% of catalyst converter as 'goodwill' in some cases; extended warranty declines repairs citing insufficient maintenance records despite factory-recommended service
Transmission hesitation and power loss (DCT/automatic)
Sporadic hesitation during acceleration from stops, inconsistent gear shifts, and sudden loss of power mid-highway. Issues occur from dead stop, during turns, and on hills. Dealerships attribute to 'transmission learning driver habits' despite owner complaints spanning 18+ months and multiple vehicles.
When: As early as 3,500–4,000 miles; sporadic through 52,000+ miles
Symptoms owners cite: 2-second stall/hesitation from complete stop at traffic lights; Engine appears to 'shut off momentarily'; Failure to accelerate on highway merges and hill climbs; Vehicle slows unpredictably during normal driving; High RPM surges regardless of speed or road type; Transmission fails to respond when passing; vehicle slows rapidly; Limp-mode activation; Check engine light (flashing or steady)
Codes mentioned: P1326 (knock sensor/combustion quality), P000B (camshaft ignition control), Various transmission codes not specified
Repairs/costs cited: No fix documented in narratives; dealers claim 'normal behavior' requiring driver adaptation; some repairs post-engine replacement include new transmission (cost ~$5,000); torque converter failure cited in one complaint
Recalls/TSBs owners mention: No recalls cited specifically for transmission; dealers tell owners problem is 'normal' and will 'learn' driving habits; no TSB or campaign response documented in narratives
Knock sensor repeated failure
Knock sensor fails repeatedly even after manufacturer replacement under class-action mandate. Failure triggers limp mode—engine limit to 10–20 mph or 45 mph—creating immediate highway hazard. Dealer refusal to diagnose root cause (bearing wear).
When: Failures repeat within months to 1–2 years of replacement; one vehicle had sensor replaced twice with continued failure
Symptoms owners cite: Check engine light illumination; Engine enters 'safety mode' limiting speed to 10–20 mph or 45 mph without warning; Loss of power mid-highway at 55–65 mph; Vehicle unable to accelerate beyond threshold speed; Flashing engine light (indicates misfire/knock detection)
Codes mentioned: P1326 (knock sensor detection system alert)
Repairs/costs cited: Sensor replacement performed twice on one vehicle under class-action settlement at no cost, but failure recurs; no root-cause repair (bearing inspection) documented
Recalls/TSBs owners mention: Class-action lawsuit settlement mandates free sensor replacement; Hyundai refunds mileage overage warranty ($1,300 as 'goodwill' for catalytic converter in one case); Campaign 966 knock sensor detection system recall issued but enforcement inconsistent
Catalytic converter premature failure
Catalytic converters fail and require replacement multiple times within 1–3 years. Root cause is oil burning from engine defect; repeated converter replacement does not resolve underlying problem, leading to cascading failures.
When: First failure ~70,000 miles; subsequent failures within 1 year of replacement
Symptoms owners cite: Check engine light (P0420 catalyst efficiency code); Reduced engine performance; Exhaust fumes entering cabin via AC vents; Rotten-egg smell; Gray smoke from exhaust
Codes mentioned: P0420 (catalyst system efficiency below threshold)
Repairs/costs cited: Replacement cost $800–$2,400 per replacement; some owners replaced converter 2–3 times in <3 years; post-replacement diagnostics reveal oil in exhaust (indicating unresolved oil-burn issue); warranty denial after 100,000 miles or mileage overage
Recalls/TSBs owners mention: Hyundai covers 50% as 'goodwill' in one case; extended warranty denies coverage citing mileage overage; no acknowledgment of root cause (oil burning)
Engine fire due to oil burning
One owner's vehicle caught fire on highway after engine oil leaked profusely into combustion chamber, igniting during acceleration. Vehicle fully engulfed; owner escaped safely but lost vehicle.
When: 55 mph on busy highway; 3 months after catalytic converter replacement
Symptoms owners cite: Gray smoke from hood cracks; Engine stalling; Check engine light illumination; Flames engulfing engine and front of vehicle within minutes
Repairs/costs cited: Vehicle destroyed; no repairs attempted
Recalls/TSBs owners mention: None documented in narrative
Transmission limp mode and gearshift failure
Transmission enters limp mode or fails to shift gears. In one case, vehicle locked with steering wheel frozen and doors unopenable after sudden acceleration loss; BlueLink diagnostics showed zero problems despite complete system failure.
When: Brand new vehicle (1,800 miles, July purchase); 52,000 miles on 11-month-old vehicle
Symptoms owners cite: Inability to shift through gears on hills; Vehicle locked (doors, steering wheel); cannot open with key, fob, or remote; Check engine light flashing; RPM surges; vehicle does not shift; Complete loss of acceleration
Codes mentioned: P000B (camshaft ignition control), P1326 (knock sensor/combustion quality)
Repairs/costs cited: One brand-new vehicle at 1,800 miles required immediate repair; another at 52,000 miles required extended shop stay (parts delayed by Hyundai); no documented fix
Recalls/TSBs owners mention: None documented; BlueLink showed 'zero problems' despite clear malfunction
Synthesized from 39 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had powertrain trouble with your 2019 Hyundai Tucson?
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 powertrain problem on the 2019 Hyundai Tucson?
It's a meaningful issue. 39 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Based on the 39 complaints filed, powertrain issues most often appear around 12,233 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 $2,500 for powertrain 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 powertrain?
No active recalls currently cover powertrain 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/2019/Hyundai/Tucson.
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.