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severe Owners of the 2006 Suzuki Forenza have filed 33 NHTSA complaints about the electrical, typically surfacing around 86,040 miles at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
| Model year | electrical complaints |
|---|---|
| 2005 Forenza | 28 |
| 2006 Forenza (this page) | 33 |
| 2007 Forenza | 31 |
| 2008 Forenza | 20 |
Of the 33 electrical complaints filed for the 2006 Suzuki Forenza, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
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.
Of the 4 model years of Suzuki Forenza we track for electrical problems, this one carries the most owner complaints on file — 33.
No new NHTSA electrical complaint has been filed on this vehicle in over 15 years — the issue may be aging out of the active population.
If the headlamps fail to function, this will lead to reduced driver visibility, increasing the risk of a crash.
The manufacturer has issued service bulletins covering electrical 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 VEHICLES: COUNTER MEASURE PROCEDURE FOR DTC P2138. MIL LIGHT IS ON, DTC P2138 STORED. FAILURE OF THE CONNECTOR AND/OR WIRING CIRCUITS BETWEEN THE ECM AND THE ACCELERATOR PEDAL POSITION SENSOR. MODELS FORENZA, FORENZA WAGON AND RENO (RQ420).
full bulletin at NHTSA ↗P0441 OR P0496 (EVAPORATIVE EMISSION SYSTEM CONTINUOUS PURGE FLOW).
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
Owners report a cascade of electrical and control failures. Headlights and running lights go out, often traced to broken wiring under the dash or multi-function switch defects. NHTSA campaigns 12V397000 and 14V262000 exist for wiring and exterior lighting, but some vehicles don't qualify for repair.
The most serious failures are fires: vehicles have burned while parked and during low-speed driving with flames originating from the steering column, blower motor harness, or instrument panel. No collision was involved.
Starting is unreliable. Vehicles won't start after overnight sitting, requiring 5+ minutes to turn over even after reprogramming. Computer reprogramming, sometimes done three times, doesn't cure the problem.
Transmissions slip from drive to neutral without warning at highway speeds—a serious safety hazard. The range sensor fails repeatedly; dealers acknowledge this as a known defect not covered past 36,000 miles despite costing only $55 to replace. Engine stalls mid-drive with no warning, and throttle sensor/body faults cause erratic running and check-engine cycling.
Battery drain is constant—batteries die repeatedly, and one owner who replaced one at 7 months couldn't restart after jumping. Windows open by themselves; instrument lights flicker and go dark. Owners cite these failures from 15,000 miles onward through high-mileage vehicles, with fire incidents recorded as late as 145,000 miles.
Same Suzuki Forenza electrical reports on nearby years: 2005 · 2007 · 2008
Low beam, high beam, and daytime running lights become inoperable or flicker intermittently. Some owners report melting wire smell from the dash. Failures traced to broken internal wiring, multi-function light switch defects, and interior/underdash wiring harness issues.
When: Between 20,000 and 145,000 miles; failures reported as early as first year of ownership
Symptoms owners cite: Low and high beams inoperative; Daytime running lights fail; Lights flicker on and off periodically; Rear tail light inoperative; Dome light inoperative; Stereo loses power; Melting wire smell from dash
Repairs/costs cited: Fuse replacement ineffective; multi-function light switch replacement required in some cases; dealers report wiring issues under dashboard; one dealership lacked proper tools to complete recall repair
Recalls/TSBs owners mention: NHTSA Campaign 12V397000 (Electrical System: Wiring: Interior/Under Dash); Campaign 14V262000 (Exterior Lighting); some vehicles reported as not falling under recall coverage despite manufacturing date within stated range
Multiple reports of vehicle fires originating in electrical systems. Fire sources include melted wiring harness around blower motors, cables at steering column, and instrument panel electrical failure. Fires occurred during driving, at idle, and while parked.
When: Various mileages from 34,000 to 145,000 miles; one fire at unknown mileage while parked
Symptoms owners cite: Smoke coming from dash during driving; Vehicle catches fire while parked; Flames from rear driver side door extending front to floor; Wiring harness melts and burns; Instrument panel catches fire
Repairs/costs cited: Vehicles destroyed; entire wiring harness replacement would cost significant amount; one vehicle still at dealership awaiting diagnosis
Recalls/TSBs owners mention: Manufacturer notified in cases #5, #6, #8, #11; no recalls specific to fire hazard identified in narratives
Vehicle loses power and stalls at various speeds (25 mph to 55 mph), sometimes with check engine light illumination. Requires 5–10 minutes before restart is possible. Failures are recurring and unpredictable.
When: Multiple occurrences; one instance at 86,040 miles, another during highway driving
Symptoms owners cite: Vehicle stalls without warning while driving; Complete loss of power while maintaining speed; Check engine light illuminates; Vehicle shifts to idle when in drive gear; Cannot accelerate; must coast; 5–10 minute restart delays
Codes mentioned: Check engine light
Repairs/costs cited: Dealership technician unable to diagnose in at least one case; throttle body actuator replacement attempted but failure persisted
Recalls/TSBs owners mention: Manufacturer notified in case #17; no resolution documented
Vehicles fail to start, especially after overnight sitting. Computer reprogramming required but does not permanently resolve issue. Shaking/rough running on startup. Repeated reprogramming attempts fail to fix underlying problem.
When: Days after purchase; recurs repeatedly over weeks of ownership
Symptoms owners cite: Vehicle will not start after sitting overnight; Engine shakes/rattles on startup like 'having a seizure'; Requires 5 minutes idle before starting; Intermittent start failures; Check engine light illuminates
Codes mentioned: Computer failure detected, Check engine light
Repairs/costs cited: Pass-through reprogramming performed multiple times; computer needed to be replaced in one case; dealer reprogrammed computer up to 3 times with no permanent fix
Recalls/TSBs owners mention: Dealership attributed to 'break-in period' initially; computer reprogramming performed but ineffective; in one case, dealer allowed vehicle to be driven with known failed computer while awaiting replacement
Range sensor fails, causing shift delays and jerking during acceleration. Vehicle slips out of gear or refuses to engage drive, shifting to neutral unexpectedly. Transmission jerks violently when shifting between reverse and drive.
When: 29,000 miles first failure, recurring at 90,000 miles; failures at 47,000 and other undocumented mileages
Symptoms owners cite: Transmission delays/jerks during acceleration; Vehicle slips from drive to neutral mid-drive; Vehicle stalls when losing power; Range selector cannot function properly; Violent jerking when shifting reverse to drive; Only able to drive in third gear; On odometer: box with lines flashing
Codes mentioned: Engine light on, Check engine light
Repairs/costs cited: Range sensor replacement ~$55 part; one dealership replaced over 1,000 range sensors; failures occur both within and beyond warranty (36,000 miles)
Recalls/TSBs owners mention: Known defect per dealership; no factory recall; not covered beyond 36,000 miles per dealership statement
Throttle sensor and throttle body actuator malfunction, causing engine to run erratically and check engine light illumination. Air conditioning cycles off during failures.
When: At 90,000+ miles in one documented case
Symptoms owners cite: Engine runs erratically; Check engine light illuminates and cycles on/off for days at a time; Air conditioning shuts off; Engine returns to normal after several minutes then fails again
Codes mentioned: Check engine light, Throttle body actuator code
Repairs/costs cited: Throttle body actuator replacement attempted; throttle sensor replacement documented
Recalls/TSBs owners mention: Manufacturer made aware; no resolution documented
Battery loses charge for no apparent reason, requiring frequent jumps. Electrical failures in windows, instruments, and lighting cause battery to drain and fail. One battery replaced 7 months before final failure.
When: Within first year of ownership and later; 15,000 miles documented in one case
Symptoms owners cite: Battery dies unexpectedly; Frequent low battery requiring jumps; Windows open independently without input; Instrument panel lights flicker; Complete electrical drain
Repairs/costs cited: Warranty expired at failure point; owner responsible for diagnosis and repair costs in one case; replacement battery did not prevent recurrence
Recalls/TSBs owners mention: Warranty denial after expiration; no recall or service campaign identified
Key sticks in ignition or cannot be inserted/removed properly. Concerns raised regarding potential similarities to documented ignition safety recalls in other vehicles.
When: Specific mileage not provided
Symptoms owners cite: Key will not come out of ignition; Key difficult to insert into ignition; Key difficult to remove from ignition
Synthesized from 33 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
Tl* the contact owns a 2006 Suzuki forenza. The contact stated that he experienced several electrical failures with the windows opening independently, failed headlights, flickering instrument panel lights and a failed battery. The vehicle was taken to a local repair facility where it was diagnosed. The mechanic advised the contact that the electrical failures caused the battery to fail. The…
It's a meaningful issue. 33 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
Across the 24 complaints that reported odometer mileage, most electrical failures cluster between 41,000 and 113,000 miles, with the median around 86,040. A quarter of owners report trouble before 41,000; a quarter make it past 113,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
Independent shops typically charge around $850 for electrical 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.
Yes — 1 active recall(s) cover electrical issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.