This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
full bulletin at NHTSA ↗2007 Saturn Ion engine problems
severe 23 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
23
Recalls
0
Avg fix
$3,100
1crash
2injuries
When does it fail?
Of the 23 engine complaints filed for the 2007 Saturn Ion, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 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
No new NHTSA engine complaint has been filed on this vehicle in over 18 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.
This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
full bulletin at NHTSA ↗This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
full bulletin at NHTSA ↗This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
full bulletin at NHTSA ↗This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
2007 Saturn Ion owners report catastrophic engine stalling at highway speeds with total loss of power steering and braking — conditions that have forced emergency stops and near-collisions. Multiple reports describe the engine dying while passing semis, merging into traffic, or on freeways at 55–70 mph, with restart delays ranging from minutes to permanent failure. Rough idling and excessive engine vibration appear early; owners describe the car "breathing heavy" or "coughing" at low RPMs (around 600) weeks before total stalls occur. A timing chain failure pattern emerges consistently across narratives — diagnosed in at least nine separate cases — with metal chunks found in the engine bay and loud clanking noises preceding catastrophic failure. Several owners report the engine never restarting after stalling. A recurring ignition lock defect prevents the key from turning the engine off; one owner had to pull the fuel fuse after the engine ran continuously for over five hours. Valve assembly problems, catalytic converter failures, and carbon monoxide buildup in the cabin round out the reported issues. Some owners cite a recall (09V419000, 07V519000) for fuel system and engine cooling, but many vehicles were excluded or dealers had no parts. Repair costs when attempted ranged from $900 to $2,500, with some owners unable to afford fixes. A timing chain replacement alone was quoted at $2,500 for one owner. One owner claims high carbon monoxide readings made her pass out while driving. These are unverified consumer allegations, but the pattern of sudden power loss at speed and timing chain failure is consistent and recurring.
Same Saturn Ion engine reports on nearby years: 2005 · 2006
Failure modes owners describe
Engine stalling at speed
Total engine shutdown while driving, typically at highway speeds (55–70 mph), causing immediate loss of power steering and braking ability. Vehicle often unable to restart or requires several minutes to restart.
When: Variable; occurs between 6,000 and 170,000 miles. Failure mileage reported as low as 6,036 miles (hybrid), more commonly 50k–90k miles.
Symptoms owners cite: Engine shuts off suddenly without warning while accelerating or merging; Loss of power steering; Loss or reduced braking ability; Turn signals and electrical systems may fail; Vehicle coasts to a stop after shutdown
Codes mentioned: Check engine light (generic, cause not always diagnosed), Battery warning light, Unknown multiple warning lights
Repairs/costs cited: Dealers performed catalytic converter replacement, ignition lock cylinder replacement, hybrid battery electrical work. Some vehicles required complete engine replacement. Owner-reported costs $900–$2,500 or more.
Recalls/TSBs owners mention: GM/Saturn recall notices issued (09V419000, 07V519000) but parts availability delayed for months; some vehicles excluded from recall coverage. Dealer responses ranged from unable to fix to inability to replicate the issue.
Timing chain failure
Timing chain skips, jumps keys, or breaks entirely, causing catastrophic engine damage and permanent failure to start. Faint clicking precedes loud clanking and metal debris ejected from engine bay.
When: 6,000–170,000 miles; commonly reported between 50k and 100k miles.
Symptoms owners cite: Faint clicking noise from engine bay, progressing to loud clanking or jerking; Check engine light illuminates; Engine stalls suddenly; Rough idle or hard starting before failure; Metal chunk or debris found in engine bay or on engine cover; Engine will not restart after stalling
Codes mentioned: Check engine light, Timing chain diagnostic codes mentioned but not specified in narratives
Repairs/costs cited: Requires complete timing chain replacement or full engine replacement. Two mechanics quoted $2,500 for engine replacement with parts and labor. Owners unable to complete repairs due to cost.
Recalls/TSBs owners mention: No recall for timing chain defect acknowledged. Manufacturer stated timing chain failure unrelated to accident damage when owners challenged diagnosis. Some customers escalated to district manager with no resolution.
Engine ignition lock cylinder malfunction
Key stuck in ignition switch; engine will not turn off even after key is turned and removed. Requires pulling fuel fuse or disconnecting battery to shut down engine.
When: Not specified; one case reported no prior issues.
Symptoms owners cite: Key turns but engine does not shut off; Key becomes stuck in ignition; Key can be removed but engine continues running; Disconnecting battery does not stop engine; Engine runs for hours (one case: 5+ hours) until fuel fuse removed
Codes mentioned: No diagnostic codes mentioned; fault diagnosed via inspection
Repairs/costs cited: Ignition lock cylinder assembly replacement. One owner had cylinder replaced twice within six months, second replacement covered under warranty; first replacement cost $916.98 (parts, labor, tax). Related to 2014 ignition recall.
Recalls/TSBs owners mention: GM issued recall related to faulty ignition (referenced in narrative #1 and #6), but recall parts delayed. Some replacements offered without warranty charge if performed within six months.
Rough idle and stalling tendency
Engine idles low (around 600 RPM) with heavy vibration, shaking, and wanting to stall. Described as car 'breathing heavy' or 'coughing.' Problem persists despite multiple repair attempts and part replacements.
When: Within one month of purchase in one case; week-long roughness before complete failure in another.
Symptoms owners cite: Heavy breathing sound at idle; Engine vibration and shaking; Car feels like it wants to stall; Rough idle at approximately 600 RPM; Coughing or rumbling from engine
Codes mentioned: Check engine light (may not illuminate initially)
Repairs/costs cited: Dealer replaced entire exhaust system and catalytic converter in one case; problem persisted. Owner attempted different fuel grades and gas stations with no improvement. Field inspector unable to replicate stalling despite hearing the heavy breathing.
Recalls/TSBs owners mention: Dealer inspection found metal shard in exhaust but replacement of exhaust system did not resolve issue. Field inspector consulted by phone concluded car in normal operating condition, despite recurring stalling weekly.
Carbon monoxide accumulation in cabin
High carbon monoxide levels detected inside the passenger compartment. Owner suffered severe headaches and fainting while driving long distances. Dealer monitoring detected high readings; fire department testing was inconclusive.
When: Early in vehicle ownership; low mileage (8,000–18,000 miles reported).
Symptoms owners cite: Severe headaches; Blackouts and fainting while driving; Elevated blood CO levels confirmed by medical testing; High CO readings inside cabin recorded by dealer device; Dizziness and lightheadedness reported by dealer technician
Codes mentioned: No engine fault codes; diagnosed via CO measurement device
Repairs/costs cited: Owner required hospitalization (5-day stay) for elevated CO levels. Dealer placed monitoring device; fire department testing inconclusive. No repair completed; owner requested vehicle replacement.
Recalls/TSBs owners mention: Saturn instructed dealer to wait for second CO measuring device. Dealership owner drove vehicle to fire station for testing; fire department unable to detect CO. Escalated for potential legal review by dealership owner.
Fuel system issues (post-recall)
After fuel system recall repair (09V419000), epoxy sealant around fuel filler neck fractured, causing fuel leaks and strong gasoline odor. Fuel tank replacement needed. Check engine light remained on due to evaporative emissions leak.
When: Approximately 52,000 miles; discovered after recall repair in May 2010.
Symptoms owners cite: Strong gasoline odor; Fuel leaking from vehicle; Check engine light on; Evaporative emissions control leak
Codes mentioned: Check engine light (evaporative emissions control leak)
Repairs/costs cited: Epoxy repair fracturing at fuel filler neck; fuel tank replacement required. Dealer offered 10% discount. Owner unable to afford $800 repair and performed partial repair himself with limited effectiveness.
Recalls/TSBs owners mention: Recall 09V419000 (fuel system delivery) completed in May 2010, but epoxy installation caused secondary leak. Manufacturer escalated case to district manager; owner awaiting contact. No warranty coverage offered for epoxy defect from recall repair.
Water ingestion into engine
Air intake located at front bumper level (right side) draws water from puddles during rain or through standing water, causing water to enter cylinders, intake manifold, and oil pan. Engine hydro-locked and required replacement.
When: Vehicle driven through water puddle on rainy road; failure occurred same day.
Symptoms owners cite: Engine stalls after driving through water puddle (mid-tire height); Loss of steering and reduced braking ability; Engine skips and misses next day; Check engine light illuminates; Difficulty starting engine
Codes mentioned: Check engine light
Repairs/costs cited: Complete engine replacement required. Dealer and manufacturer denied warranty coverage. Insurance claim filed and paid.
Recalls/TSBs owners mention: Dealer and manufacturer refused to honor warranty for water ingestion damage, citing driving through water as user error rather than design defect.
Valve assembly and secondary air system failure
Valve assembly in secondary air system fails, triggering check engine light. Occurs in conjunction with ignition lock failure in one case, raising questions about electrical system cascade failures.
When: Discovered during diagnostic for ignition lock failure; current mileage not specified in detail.
Symptoms owners cite: Check engine light illuminates; No drivability symptoms mentioned in isolation
Codes mentioned: Valve assembly fault code for secondary air system
Repairs/costs cited: Valve assembly replacement performed at dealership as part of $916.98 repair bill. Owner questioned whether ignition lock malfunction (requiring battery disconnect) caused electrical cascade that damaged valve assembly.
Recalls/TSBs owners mention: Dealership replaced valve assembly without comment on cause or warranty coverage details.
Fuel line leak
Fuel line running from tank to engine develops a leak, allowing gasoline to escape. No other details provided by owner.
When: 68,000 miles.
Symptoms owners cite: Gasoline leaking from fuel line
Repairs/costs cited: Not diagnosed or repaired; owner did not pursue repair.
Recalls/TSBs owners mention: Manufacturer not notified by owner.
Engine metal failure (timing chain or internal component)
Large metal chunk ejected from engine after loud bang and jolt, followed by high-pitched squealing. Suspected timing chain failure based on faint clicking noise preceding the incident.
When: Vehicle stalled on freeway after loud bang; metal chunk found on engine.
Symptoms owners cite: Loud bang with jolt while driving; High-pitched squealing sound; Battery warning light and check engine light; Engine will not restart after jump start; Large metal chunk on top of engine cover; hole in engine bay where it exited
Codes mentioned: Battery warning light, Check engine light
Repairs/costs cited: Owner suspected timing chain failure. Vehicle towed; no repair completed; owner did not pursue further diagnosis.
Recalls/TSBs owners mention: Not mentioned in narrative.
Synthesized from 23 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Vehicle traveled through water puddle on a rain soaked roadway. Puddle was no deeper than mid- tire height level. Engine stalled out causing loss of steering and some braking ability. Engine was restarted and vehicle drove less than two miles home. Next day, engine started after numerous attempts. Engine skipping and a check engine light was on. Vehicle was driven to dealership. Dealership…
Had engine trouble with your 2007 Saturn Ion?
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 2007 Saturn Ion?
It's a meaningful issue. 23 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 20 complaints that reported odometer mileage, most engine failures cluster between 55,000 and 102,000 miles, with the median around 78,000. A quarter of owners report trouble before 55,000; a quarter make it past 102,000. 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/2007/Saturn/Ion.
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.