This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
full bulletin at NHTSA ↗2009 Toyota Tacoma engine problems
severe 14 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
14
Recalls
0
Avg fix
$3,100
1fire
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine 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.
This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
full bulletin at NHTSA ↗This is to advise of various price adjustments that will affect Toyota Genuine Motor Oil and Long Life Coolant, effective March 1, 2024. These products are ordered through the Toyota Complete Maintenance Care (TCMC) website.
full bulletin at NHTSA ↗TT: HVAC drain tube is found to be blocked/clogged.
full bulletin at NHTSA ↗TT: HVAC drain tube is found to be blocked/clogged.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2009 Tacoma's primary complaint cluster centers on sudden, uncontrolled engine acceleration. Multiple owners describe the engine revving to 7,000+ RPM when braking, sometimes propelling the truck forward despite full brake pressure. This happens at traffic lights, while shifting from park to neutral, and even while backing slowly. It's not floor-mat related—owners have verified mat position during incidents. One owner experienced three separate rapid-acceleration events and notes the truck's brake-cutoff software retrofit helped prevent what could have been a collision. Another owner says it's happened about four times over five years; a third owner reports it occurred at least ten times in 18 months of ownership.
Beyond acceleration, owners report a plastic water bypass pipe that leaks coolant at the flange around 200K miles, requiring intake removal and risking head-gasket failure—Toyota later redesigned the part in stainless steel but no recall was issued. Other engine failures include idle RPM surges to 4,000 for several minutes at low mileage, complete shutdown while driving at 30 mph with a dealer-replaced computer chip that didn't fix it, warped exhaust manifolds at 550 miles, a catalytic converter failure (P0420), and one vehicle that caught fire in the engine compartment at 97K miles. Dealers frequently cannot replicate or fix these problems, and manufacturer responses range from offering no remedy to blaming driver behavior or fuel quality.
Same Toyota Tacoma engine reports on nearby years: 2006 · 2007 · 2008 · 2012
Failure modes owners describe
Unintended rapid acceleration
Engine revs suddenly to high RPM (3,000–7,000+) while braking, shifting, or stopped in traffic, often requiring brake override or gear shift to neutral to regain control. Occurs intermittently, sometimes multiple times over vehicle ownership. Not related to floor mats or pedal design.
When: Low mileage (10K–25K) and across vehicle lifetime; one incident in parking lot at 2:25 PM 11/27/10; another while backing at slow speed
Symptoms owners cite: Engine races to 7,000+ RPM when braking; Forward motion despite brake application, tires smoking and screeching; Occurs while stopped at lights or in drive position; Happens when shifting from park to neutral; Engine dies back to idle after reaching max RPM; Brake slip under engine load; Problem on both 2008 and 2009 models in same owner's household
Repairs/costs cited: Dealer unable to find cause; software update (engine shutdown when brake applied) helped one owner. Dealer stated problem is a vehicle characteristic with no remedy available. Computer chip replacement did not resolve issue in one case.
Recalls/TSBs owners mention: Recall involved accelerator pedal cutback and software to shut off engine when brake applied (addressed in complaint #1 after prior incidents). Technician stated failure was characteristic of vehicle and no remedy was available.
Water bypass pipe coolant leak and overheating
Plastic water bypass pipe in engine valley wears or fails at the flange, causing coolant leakage, overheating, and loss of heat. Requires intake removal to access. Owner replaced faulty plastic pipe with newer stainless steel design (part 1626875131). Risk of head gasket failure if not addressed.
When: Approximately 200,000 miles; leak diagnosed December 2019
Symptoms owners cite: Coolant leakage from water bypass pipe; Engine overheating; Loss of heat in cabin; Low coolant levels
Repairs/costs cited: Owner self-repaired in December 2019 after multiple failed thermostat replacements. New part 1626875131 (stainless steel); old part was plastic. Labor quoted at 6–8 hours; parts cost ~$150 including gaskets, bolts, washers, intake gasket, throttle gasket, and coolant. Intake removal required.
Recalls/TSBs owners mention: No recall issued despite design change from plastic to stainless steel.
Idle RPM surge
Engine RPM increases unexpectedly while vehicle is parked with engine running, rising to 3,000–4,000 RPM for 1–3 minutes before returning to normal idle. Occurs intermittently, multiple times before service attempt.
When: Low mileage: failures occurred between 1,500 and 3,500 miles
Symptoms owners cite: Unusual increase in engine RPM while idling; RPM surge to 4,000 for approximately three minutes; Returns to normal idle after episode
Repairs/costs cited: Dealer unable to duplicate the failure.
Spontaneous engine fire
Vehicle caught fire in engine compartment while driving at 55 mph. All instrument cluster warning lights illuminated. Fire department responded. Vehicle was total loss.
When: 97,000 miles
Symptoms owners cite: Engine compartment fire; All warning lights illuminated; Vehicle became engulfed in flames
Repairs/costs cited: Vehicle was total loss and towed to independent lot.
Catalytic converter failure
Catalytic converter fails, triggering check engine light with P0420 fault code. Heat shield rattles; exhaust backs up to pressure release mount. Owner questions whether 2009 model can be covered under 2010–2014 Tacoma 2TR-FE exhaust pipe catalytic converter warranty extension.
When: Not specified; owner sought warranty extension coverage
Symptoms owners cite: Check engine light illumination; Rattling heat shield noise; Exhaust backup at pressure release mount
Codes mentioned: P0420
Repairs/costs cited: Dealer diagnosis: catalytic converter replacement required.
Complete engine shutdown while driving
Engine shuts down completely at low speed (30 mph or less) while vehicle is in motion. Dealer unable to identify root cause. Computer chip replacement did not resolve issue. Manufacturer suggested bad fuel as possible cause but vehicle was not repaired.
When: Failure at approximately 14,500 miles; current mileage 25,375
Symptoms owners cite: Complete engine shutdown while driving; Vehicle unable to restart without dealer intervention
Repairs/costs cited: Dealer replaced computer chip but failure continued.
Recalls/TSBs owners mention: Manufacturer suggested bad fuel as possible cause; no other remedy provided.
Engine noise and warped exhaust manifolds at low mileage
Engine makes persistent noise at very low mileage (550 miles). Valves and lifters required readjustment. Both exhaust manifolds warp and leak within days of initial repair attempt. Heads and pistons show blue discoloration. Problem not resolved after two weeks in dealership service.
When: 550 miles; diagnosed March 18, 2009; still unresolved after two weeks
Symptoms owners cite: Engine noise; Valve and lifter noise; Warped exhaust manifolds; Exhaust leaks; Blue discoloration on metal and engine heads/pistons
Repairs/costs cited: Valves and lifters readjusted on 3/18/09; vehicle returned 3/20/09 still making louder noise. Exhaust manifolds replaced; heads and pistons showed blue oxidation. Unresolved after two weeks of dealership work.
Fuel ratio sensor failure
Fuel ratio sensor light illuminates. Toyota refused to cover repair costs under warranty.
When: 34,000 miles; 39 months of ownership
Symptoms owners cite: Fuel ratio sensor warning light
Recalls/TSBs owners mention: Toyota refused warranty coverage for repair.
Transmission engagement delay and rev noise during turns
When turning the vehicle, engine revs very loudly but transmission does not engage or misses first gear for a few seconds. Dealer identified computer failure; manufacturer technician stated this is a vehicle characteristic with no remedy available.
When: Low mileage: failure at 15 miles, current 2,100 miles
Symptoms owners cite: Loud engine revving during turns; Transmission does not engage; Missing 1st gear for a few seconds
Repairs/costs cited: Dealer stated failure due to computer failure.
Recalls/TSBs owners mention: Manufacturer technician stated this was a characteristic of the vehicle and no remedy was available.
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 engine trouble with your 2009 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 engine problem on the 2009 Toyota Tacoma?
It's a meaningful issue. 14 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Across the 10 complaints that reported odometer mileage, most engine failures cluster between 10,000 and 48,250 miles, with the median around 34,000. A quarter of owners report trouble before 10,000; a quarter make it past 48,250. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine 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 engine?
No active recalls currently cover engine 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/2009/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.