The 2011 Nissan Altima comes standard with a 2.5-liter inline-4 engine (QR25DE) that produces 175 horsepower and 180 lb-ft of torque. This naturally aspirated engine features dual overhead cams, variable valve timing, and an aluminum block construction. It’s paired with either a 6-speed manual transmission or Nissan’s Xtronic CVT automatic transmission. The 2.5L engine provides decent fuel economy, achieving approximately 23 mpg city and 32 mpg highway with the CVT. This engine is known for its smooth operation and adequate power for daily driving, though it’s not particularly sporty. The QR25DE has been used across multiple Nissan models and is generally considered reliable when properly maintained with regular oil changes.

The 2011 Nissan Altima shares most parts with the 2007-2012 model years, as they represent the fourth generation of the Altima. Engine components from the 2.5L QR25DE are largely interchangeable across these years, including intake manifolds, cylinder heads, and most sensors. Body panels, interior trim, and suspension components are also compatible within this generation. However, there were minor updates in 2010 that affected some electrical components and trim pieces. The CVT transmission parts are compatible from 2007-2012, though there were internal updates over the years. Some parts like headlights, taillights, and bumpers may have slight variations between pre-facelift (2007-2009) and post-facelift (2010-2012) models. Always verify part numbers when sourcing components to ensure proper fitment.

Parts availability changes daily. Call us at (603) 392-7313 or visit our online shop to check current inventory from this specific vehicle. If we have sold a part you need, our Parts Broker service can source it from our network of partner yards nationwide.

Yes! We ship parts from this vehicle and our entire inventory nationwide. Most orders ship within 1-2 business days via FedEx or freight carriers for larger components like engines and transmissions. Call (603) 392-7313 for a shipping quote on any part.

The 2.5L QR25DE engine in the 2011 Altima is generally reliable when properly maintained, but it’s not without issues. The engine itself can easily reach 200,000+ miles with regular oil changes every 5,000 miles using conventional or synthetic blend oil. Common maintenance items include replacing the crankshaft position sensor around 80,000-100,000 miles and keeping up with spark plug changes every 60,000 miles. The main reliability concern isn’t the engine itself, but rather the CVT transmission it’s paired with, which has a high failure rate. The 2.5L engine is known for smooth operation and decent fuel economy, but it can develop oil consumption issues if maintenance is neglected. Overall, with proper care, this engine is more reliable than the transmission it’s connected to.