Owners of 2006 Nissan Altimas describe two dominant engine failure patterns. The first is excessive oil consumption tied to faulty piston rings. Owners report oil levels dropping dramatically—sometimes one quart every 600–1000 miles—yet many were not alerted to Recall 06V223000 before purchasing. Dealers initially put cars on 700-mile monitoring intervals before authorizing engine replacement. Some engines caught fire or blew rods, and several owners claim Nissan declined coverage even when symptoms matched the recall. The second pattern involves crankshaft (and sometimes camshaft) position sensor failures that cause sudden stalls at highway speeds, loss of power steering, and restart difficulty. Recall 07V527000 required ECM reprogramming, but many owners say the fix did not stop the stalls and dealers refused to replace the defective sensors despite redesigned parts being available. A third issue involves engine knock, ticking, and catastrophic failure (thrown rods, shattered internals) occurring after oil runs critically low or catalytic converter damage allows debris into the engine. Owners also report transmission hesitation, difficulty shifting, and fuel-pump replacement within days of purchase on some units. A recurring complaint is that Nissan sold affected vehicles without disclosure, then fought warranty claims or limited fixes to reprogramming rather than part replacement, leaving owners to choose between paying out-of-pocket repairs and driving unsafe cars.
Failure modes owners describe
Excessive oil consumption / piston ring failure
Engine consumes oil at 1+ quarts per 600–1000 miles due to defective piston rings (Recall 06V223000). Oil level drops below safe minimum before scheduled maintenance, causing engine knock, damage, and potential fire.
When: Early ownership, often 1000–2800 miles; symptoms emerge 3–6 months after purchase; remanufactured engines also fail
Symptoms owners cite: Oil level critically low (not registering on dipstick) after short intervals; Engine knock or rattling noise; Service Engine light / Check Engine light; Smoke or fire from engine compartment; Oil burning without visible leaks
Codes mentioned: Service Engine Light (various)
Repairs/costs cited: Dealers performed 700-mile oil-level monitoring tests, then engine replacement under warranty. Some owners paid $7000 for new engine or $3850 for used engine when warranty expired or vehicle was out-of-pocket. Extended service agreements sometimes covered replacement; others denied coverage.
Recalls/TSBs owners mention: Recall 06V223000 (Excessive Engine Oil Consumption as result of improper performance of piston rings). Nissan issued letter requiring owners to monitor oil every 700 miles and return for testing. Later phases authorized engine replacement. However, owners report Nissan denied coverage for vehicles outside VIN ranges and for those past warranty, despite matching symptoms.
Crankshaft position sensor failure / overheating
Crankshaft position sensor overheats, causing brief signal loss. ECM may not detect it in time, resulting in unexpected engine stall, loss of power steering, and restart difficulty. Recall 07V527000 required ECM reprogramming but did not replace the faulty sensor.
When: 2007–2008 and beyond; some failures at relatively low mileage (42K, 58K miles); recurrence after reprogramming
Symptoms owners cite: Engine stalls suddenly while driving (at highway speed 60–70 mph or in traffic); Check Engine light; Jerking or lurching upon acceleration; Difficulty starting (requires multiple crank attempts); Loss of power steering during stall; Service Engine light with code P2138 (pedal/throttle sensor), or crankshaft sensor code
Codes mentioned: Crankshaft Position Sensor code, Camshaft Position Sensor code, P2138
Repairs/costs cited: Dealers performed ECM reprogramming under Recall 07V527000 free of charge (estimated cost when independent: $394–$628.50 for sensor replacement alone). However, reprogramming did not stop recurrent stalls in multiple cases. Independent shops and Sears replaced the sensor ($120 per report) or both crankshaft and camshaft sensors; parts were redesigned but not covered under recall for many VINs.
Recalls/TSBs owners mention: Recall 07V527000 (Campaign ID 6827, effective Dec 31, 2007): ECM reprogramming for affected 2.5L Altimas/Sentra models. Nissan stated vehicles previously repaired under 06V223000 were already reprogrammed and exempt. However, owners report Nissan refused to acknowledge or replace the sensor itself even when it continued to fail post-reprogramming.
Engine catastrophic failure / rod knock / internal damage
Engine develops catastrophic internal damage (thrown rod, shattered piston chamber, destroyed reciprocating components) typically after oil starvation or debris ingestion. Results in complete engine seizure, fire, or safety hazard.
When: Occurs after prolonged low-oil condition (3–6 months to 115K miles, depending on consumption rate); can occur within first year if oil monitoring lapses
Symptoms owners cite: Loud knocking, clattering, or 'rocks in a tin can' noise from engine; Smoke or flames from engine compartment; Engine seizes / stops running; No oil on dipstick; Hole in engine block (literal perforation from rod)
Codes mentioned: Service Engine Light
Repairs/costs cited: Full engine replacement required ($3000–$7000). Some covered under Recall 06V223000 or factory warranty if within coverage window. Many owners outside warranty paid out-of-pocket. One owner replaced engine personally for ~$4600 (parts + labor).
Recalls/TSBs owners mention: Recall 06V223000 included engine replacement as a remedy in later phases. However, owners report Nissan refused coverage if the vehicle was purchased used, or if the original warranty had expired. One remanufactured engine (35 miles) threw a rod at 13,791 miles despite dealer assurance the issue was resolved.
Crankshaft position sensor recurrence / inadequate recall fix
After Recall 07V527000 ECM reprogramming, crankshaft position sensor issues recur in the same vehicle or sister components (camshaft sensor) fail. Nissan refuses further warranty support despite redesigned sensor availability.
When: Months to years after ECM reprogramming; some failures 2–3+ years later
Symptoms owners cite: Engine stalls or jerks again after reprogramming; Check Engine light reappears; Difficulty starting after stall; Camshaft sensor also fails
Codes mentioned: Crankshaft Position Sensor, Camshaft Position Sensor, P2138
Repairs/costs cited: Sensor replacement ($120–$628) required. Nissan mechanic acknowledged sensor was faulty and replacement part redesigned but refused recall coverage. Some owners paid for re-training of electronic sensor program or replacement at independent shops.
Recalls/TSBs owners mention: Recall 07V527000 was limited to ECM reprogramming. Nissan stated that if reprogramming failed, it was not a recall issue and sensor replacement was owner responsibility. One service manager admitted redesigned sensor part existed.
Engine hesitation / acceleration loss / throttle issues
Engine hesitates, bucks, or loses acceleration during driving. Service Engine light and diagnostic codes point to pedal position sensor and throttle body. May recur after repair.
When: First occurrence 2010; recurrence 2013 after prior repair
Symptoms owners cite: Sudden loss of acceleration despite pressing gas pedal hard; Engine deceleration or bucking at idle or in traffic; Check Engine light; Erratic RPM behavior
Codes mentioned: P2138 (Pedal Position Sensor / Throttle Position Sensor error)
Repairs/costs cited: Gas pedal sensor and throttle body replacement; attempted sensor program re-training at Sears and dealer. Repairs at Sears and dealership; cost not stated. Problem recurred multiple times despite repairs.
Recalls/TSBs owners mention: None documented; issue attributed to sensor malfunction, not recall.
Engine fire due to loose oil plug / damaged oil cooler
Engine fire caused by unsecured oil drain plug (post-service) or defective oil cooler with hole. Fire/smoke occurs while driving at highway speed, causing engine compartment fire and safety hazard.
When: Shortly after service (oil change); or after years of operation (valve cover gasket repair, oil cooler failure)
Symptoms owners cite: Smoke and fire from engine compartment; Black fluid flow toward rear of vehicle; Strong smell of smoke; Engine damage
Repairs/costs cited: One incident blamed on Jiffy Lube oil-plug installation (owner skeptical this was the true cause given concurrent recall issues). Oil cooler replacement quoted at $500–$600. Valve cover gasket repair $1200; subsequent oil cooler work ~$500–$600 additional.
Recalls/TSBs owners mention: In the case of the loose oil plug, Nissan blamed Jiffy Lube on the phone. One owner was covered under extended warranty for engine replacement; another was told cooler replacement was non-recall maintenance.
Difficult cold start / starting issues
Vehicle difficult or very slow to start, especially when warm. May require multiple crank attempts or extended cranking times.
When: Early ownership and intermittently throughout lifespan
Symptoms owners cite: Difficult start (multiple attempts needed); Slow/prolonged cranking when warm; Check Engine light (sometimes); Battery drain concerns
Codes mentioned: Crank sensor code (sometimes)
Repairs/costs cited: Dealers blamed steering wheel lock or battery. One owner bought new battery, which helped briefly. Crank sensor replacement did not resolve in some cases.
Recalls/TSBs owners mention: Steering-wheel lock issue blamed in one case; no formal recall response documented.
Engine noise / tick / knock at moderate to high mileage
Engine develops ticking or knocking noise, often attributed to excessive oil consumption and piston/valve damage. Noise progresses and may indicate imminent internal failure.
When: 80K–115K miles and beyond
Symptoms owners cite: Ticking or clicking noise from engine; Loud knock resembling 'rocks in a tin can'; Roughness at idle
Repairs/costs cited: Engine replacement or rebuild required if damage confirmed. One owner replaced engine for ~$4600 (2014). Another dealer quoted $6000 for new engine.
Recalls/TSBs owners mention: Federal powertrain warranty (up to 150K miles, in one case) sometimes applies but Nissan has refused some claims, stating owner should have brought car in sooner.
Transmission shift hesitation / harsh shifting
Transmission hesitates, jerks, or fails to maintain gear. Service Engine light and diagnostic codes for transmission controls.
When: Very early (1500 miles in one case)
Symptoms owners cite: Hesitation or jerking when shifting; Difficulty maintaining gear; Check Engine light; Rough shift feel
Codes mentioned: Service Engine Light (transmission-related)
Repairs/costs cited: Dealer replaced 'part' to fix; specific part/cost not documented in narratives.
Recalls/TSBs owners mention: Dealer performed repair under warranty.
Fuel pump failure (very early)
Fuel pump replaced within days of purchase; car very difficult to start.
When: 5 days after purchase (late April 2006)
Symptoms owners cite: Very difficult to start; Fuel pump defect
Repairs/costs cited: Fuel pump replaced by dealer.
Recalls/TSBs owners mention: Warranty repair.
Excessive oil consumption not covered by VIN-specific recall
Vehicle exhibits excessive oil consumption matching Recall 06V223000 symptoms and criteria, but VIN is outside the recall range. Nissan refuses to acknowledge or service the issue, citing VIN exclusion.
When: Early to moderate mileage (same timeframe as recall vehicles)
Symptoms owners cite: Oil level drops 1 quart every 300–500 miles; No external leaks visible; Engine knock when oil runs low
Repairs/costs cited: Nissan refused inspection or repair without owner paying dealer cost. One owner was advised Nissan already fixed the issue for that VIN and would not service again without payment.
Recalls/TSBs owners mention: Recall 06V223000 exclusion: Nissan stated vehicle was outside VIN recall range and therefore not covered. One representative claimed the fix was already applied to that VIN and would not repeat work for free.
Synthesized from 287 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.