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full bulletin at NHTSA ↗2006 Suzuki Forenza engine problems
moderate Owners of the 2006 Suzuki Forenza have filed 26 NHTSA complaints about the engine, typically surfacing around 50,000 miles at roughly $3,100 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Failure mileage
Complaints
26
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2005 Forenza | 13 |
| 2006 Forenza (this page) | 26 |
| 2007 Forenza | 27 |
| 2008 Forenza | 6 |
When does it fail?
Of the 26 engine complaints filed for the 2006 Suzuki Forenza, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 26 engine 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 engine complaint has been filed on this vehicle in over 11 years — the issue may be aging out of the active population.
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.
SUZUKI VEHICLE: COUNTER MEASURE PROCEDURE FOR DTC P2135. MIL LIGHT IS ON; DTC P2135 STORED WITHOUT FULLY CHECKING SYSTEM AND CIRCUITS AFTER REPAIRS AND/OR REPLACEMENT TO THROTTLE BODY.
full bulletin at NHTSA ↗OIL CONSUMPTION OR EXHAUST SMOKE (EXCESSIVE).
full bulletin at NHTSA ↗EVAPORATIVE EMISSION SYSTEM CONTINUOUS PURGE FLOW. ECM SOFTWARE COULD CAUSE UNNECESSARY ILLUMINATION OF THE MALFUNCTION INDICATOR LAMP. SUZUKI.
full bulletin at NHTSA ↗HARD START WITH EXTENDED CRANKING TIME. ECM SOFTWARE LOGIC.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
No-start and cold-start failures plague these vehicles from day one. Owners bought brand-new cars that wouldn't start within days of purchase; some needed multiple crank attempts, others wouldn't start after sitting. Dealerships acknowledged this as a known problem with no fix available at the time, though Suzuki promised a recall fix later.
Rough idle and stalling hit hard too. Engines stall while stopped or driving, especially in the first 10-15 minutes after startup. One owner's car nearly died multiple times while driving—a safety hazard the manufacturer blamed on a software glitch that uploaded summer fuel data instead of winter data to manual transmission vehicles.
Check engine lights stay on constantly or come back repeatedly after dealers reset them. Owners traced problems to oxygen sensors, but fixes didn't stick. Over $330 in repairs and multiple service visits didn't solve one case; another had a dealer-installed "fix" fail within days.
Transmission range sensors go loose and require manual adjustment every few days—one owner spent three weeks waiting for a gas cap and still had a lit check engine light. The worst cases: timing chains separating at highway speed and pistons punching through engine blocks, with the second catastrophic failure denied warranty coverage two months after expiration.
A few owners reported unintended acceleration, fuel leaks, and engine overheating with internal damage. Dealers repeatedly claimed these are "common issues" with no recalls.
Same Suzuki Forenza engine reports on nearby years: 2005 · 2007
Failure modes owners describe
No-Start / Cold-Start Failures
Vehicle fails to start after sitting, requires multiple attempts, or won't start in cold conditions. Owners report this occurs within days of purchase on brand-new vehicles. Dealers acknowledged it as a known issue with no fix available at time of complaint. One owner was told cold-start issues would be addressed in a future recall.
When: Occurs within 1-3 weeks of purchase; intermittent; after vehicle sits
Symptoms owners cite: Vehicle won't turn over on first attempts; Multiple start attempts required; Won't start after sitting for a while; Cold start failures
Repairs/costs cited: Dealers replaced spark plugs and computer software on some vehicles; no permanent fix confirmed by owners
Recalls/TSBs owners mention: Suzuki acknowledged this as a known problem; no fix available at time of complaints; promised future recall message
Rough Idle / Stalling
Engine runs rough at idle or stalls during operation, particularly within first 10-15 minutes after starting. Intermittent stalling while driving or stopped. One owner reported car nearly died while driving multiple times.
When: Occurs within days to weeks of purchase; first 10-15 minutes of driving; intermittently while driving
Symptoms owners cite: Rough idle; Vehicle stalls while stopped; Vehicle stalls while driving; Car nearly dies while driving; Vehicle shuts off without warning
Repairs/costs cited: Replaced spark plugs and computer on one vehicle; problem recurred; one complaint mentions 2-week dealer hold with no resolution
Recalls/TSBs owners mention: One owner reported manufacturer cited software glitch with summer fuel data in manual transmission models; fix available for automatics only, not manuals
Check Engine Light - O2 Sensor / Emissions Related
Check engine light illuminates, often traced to oxygen sensor failure. Dealers reset codes temporarily but light returns repeatedly. One owner reported light came on 3 weeks after purchase; another reported gaseous smell with O2 sensor issue.
When: Within 3 weeks of purchase; recurring throughout ownership; mileage 26,548 to 96,000
Symptoms owners cite: Check engine light illuminates; Check engine light comes on intermittently; Check engine light recurs after reset; Gaseous odor in passenger compartment
Codes mentioned: O2 sensor codes (oxygen sensor), P0440 suspected (based on gas cap replacement attempts)
Repairs/costs cited: Dealers reset codes multiple times; attempted O2 sensor replacement; gas cap replacement; one mechanic recommended MAP sensor and wiring harness replacement; catalytic converter replacement mentioned as potential fix after warranty expiration
Recalls/TSBs owners mention: One dealer installed promised fix on August 25 but light returned within days and no follow-up provided; manufacturer denied assistance in at least one case
Transmission Range Sensor Malfunction
Range sensor fails, causing car to jerk when shifting gears or accelerating. Sensor location becomes loose and requires repeated manual adjustment. Vehicle displays both 'R' and 'D' on instrument panel simultaneously.
When: October 2010; mileage 51,000; ongoing intermittent failures
Symptoms owners cite: Car jerks when shifting or accelerating; Both 'R' and 'D' displayed on instrument panel simultaneously; Loss of acceleration while driving; Engine light illuminates when sensor acts up
Repairs/costs cited: Mechanic at Midas found loose sensor; manual adjustment (pushing back into place and wiggling) provided temporary fix lasting 3-5 days; owner cited $253 replacement cost; one repair cited $350 plus labor; one case required timing chain, water pump, timing belt, valves, and cylinder head replacement with sensor still not permanently fixed
Recalls/TSBs owners mention: No dealer action documented; owner requests recall
Unintended Acceleration / Throttle Assembly Failure
Pressing accelerator pedal causes engine to rev loudly but vehicle does not move. Throttle assembly not allowing fuel to enter engine. Dealer confirmed this as a very common issue.
When: At 40,000 miles; current mileage 55,000
Symptoms owners cite: Engine revs without vehicle moving forward; Vehicle does not respond to accelerator input; Vehicle does not run at times
Repairs/costs cited: Dealer did not perform repair; owner believes should be warranty covered
Recalls/TSBs owners mention: Dealer stated this is a very common issue with no recalls issued; owner believes should not be owner's responsibility
Timing Chain Separation / Engine Internal Failure
Timing chain separates causing engine stall at highway speeds. Multiple repair attempts (timing chain replacement twice, water pump, timing belt, valves, cylinder head replacement) have not corrected failure. Separate case reports pistons going through engine block at 51,000 miles and again at 115,000 miles.
When: 51,000 miles (timing chain case); 115,000 miles (piston failure case); January 2011 and June 2013 for piston failures
Symptoms owners cite: Vehicle stalls while driving at highway speed (65 mph); Vehicle loses all speed and stops; Engine completely blown; Loss of engine power
Repairs/costs cited: Timing chain replaced twice, water pump replaced, timing belt replaced, valves and cylinder head replaced in one case; full engine replacement in piston failure case; second engine replacement denied post-warranty
Recalls/TSBs owners mention: No recall action documented; replacement engine installed but warranty denied 2 months past expiration
Intermittent Start / Neutral Requirement
Vehicle requires shifting into neutral to start engine. Check engine light illuminates after starting. One owner reported this began within days of purchase.
When: Within days to weeks of purchase; mileage range 44,000-54,000
Symptoms owners cite: Vehicle will not start in park; Check engine light illuminates after starting; Requires shift to neutral to start
Repairs/costs cited: Vehicle was repaired per summary but repair method not specified
Recalls/TSBs owners mention: Manufacturer was notified but denied assistance with repair
Fuel System / Gas Cap Issues
Check engine light related to fuel system. Gas cap replacement took 3 weeks to obtain. Engine light continued illuminating after multiple repair attempts costing over $330.
When: Engine light issue ongoing; gas cap replacement delayed 3 weeks
Symptoms owners cite: Check engine light illuminates; Engine light recurs after repairs
Repairs/costs cited: Gas cap ordered and replaced; cost exceeded $330 with multiple service visits; separate mechanic recommended MAP sensor and wiring harness; vehicle stalled twice on freeway during diagnostics
Recalls/TSBs owners mention: Gas cap replaced by manufacturer (ordered); subsequent repairs not effective
Engine Overheating / Internal Damage
Engine overheats, causing internal damage that prevents starting. Failure confirmed by independent mechanic.
When: At approximately 50,000 miles
Symptoms owners cite: Vehicle fails to start after repeated attempts; Engine overheated
Repairs/costs cited: Towed to independent mechanic; internal engine damage confirmed; vehicle not repaired
Recalls/TSBs owners mention: Manufacturer not notified
Loud Exhaust Noise / Stalling Startup
Loud noise similar to bad exhaust appears 5 weeks after purchase, accompanied by stalling during first 10-15 minutes of driving. Noise persists after 2-week dealer service hold.
When: 5 weeks after purchase; occurs during warm-up period
Symptoms owners cite: Loud noise similar to bad exhaust; Vehicle stalls while stopped; Stalls during first 10-15 minutes of driving
Repairs/costs cited: Dealer kept vehicle 2 weeks; stalling did not recur but noise returned
Recalls/TSBs owners mention: No action documented
Fuel Leakage / Stalling
Engine stalls while driving and fuel leaks from vehicle. No diagnosis or repair performed.
When: At 145,000 miles
Symptoms owners cite: Vehicle stalls at 45 mph; Fuel leaks from vehicle
Repairs/costs cited: Vehicle not diagnosed or repaired
Recalls/TSBs owners mention: Manufacturer not notified
Intermittent Check Engine Light - Undiagnosed
Check engine light illuminates intermittently. Dealer unable to diagnose the problem despite inspection.
When: Approximately 71,000 miles
Symptoms owners cite: Check engine light illuminates intermittently
Repairs/costs cited: Vehicle not repaired; dealer unable to diagnose
Recalls/TSBs owners mention: Manufacturer not notified
Synthesized from 26 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Tl* the contact owns a 2006 Suzuki forenza. The contact stated that while driving 45 MPH, the engine stalled. In addition, the contact noticed that there was fuel leaking from the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The VIN was not available. The approximate failure mileage was 145,000.
Had engine trouble with your 2006 Suzuki Forenza?
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 2006 Suzuki Forenza?
It's a documented issue but not catastrophic. 26 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 16 complaints that reported odometer mileage, most engine failures cluster between 26,548 and 68,391 miles, with the median around 50,000. A quarter of owners report trouble before 26,548; a quarter make it past 68,391. 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/2006/Suzuki/Forenza.
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.