The 2010 Nissan Sentra and Sentra SE-R price for North America was announced today, along with details referring to the interior and exterior enhancements.
For the 2010 year model the Nissan Sentra received a Navigation Package that includes a 5 inch color display and XM Real-Time Traffic Info with subscription sold separately plus leather-appointed seating,  iPod and Bluetooth controls as well as Vehicle Dynamic Control (VDC) and Traction Control System (TCS) that are offered as standard on the 2.0 SL model.  
The 2010 Nissan Sentra price starts at $15,420 for the 2.0 version that uses a 2.0-litre 4-cylinder engine packing 140 HP linked to a six-speed manual transmission while the SE-R goes on sale for $19,580.
For the top of the line 2010 Nissan Sentra SE-R spec V price starts at $20,080, and the car comes with a 2.5-liter 4-cylinder engine that develops 200 HP. More specific details referring to standard and optional equipment for the 2010 MY Nissan Sentra available in the official press release below.
Nissan press release :
Nissan North America, Inc. (NNA) today announced pricing for the 2010 Nissan Sentra and Sentra SE-R, which are on sale now at Nissan retailers nationwide.  Sentra receives a number of enhancements for the new model year, including updated exterior styling on Sentra 2.0, 2.0 S and 2.0 SL models, along with significant Manufacturer’s Suggested Retail Price* (MSRP) reductions on most trim levels: 

The lowest priced 2010 Sentra is the Sentra 2.0 with 6-speed manual transmission, which starts at $15,420 USD.  Among the new or revised option packages for 2010 is a first-ever Sentra Navigation Package (2.0 SL, SE-R, SE-R Spec V, January 2010 availability), which includes a 5.0-inch color screen and XM NavTraffic® Real-Time Traffic Information (XM® subscription required, sold separately).  Pricing for the Navigation Package will be just $400 (MSRP).
“In addition to the product updates Sentra receives inside and out, Sentra now offers even greater value for 2010 – demonstrating Nissan’s commitment to reducing the cost of ownership and improving value to our customers,” said Christian Meunier, vice president, Marketing, Nissan Division, NNA.  “These price reductions, paired with the many content and design enhancements for 2010, strengthen Sentra’s position as a major player in its segment.” 

About the 2010 Nissan Sentra
The Nissan Sentra continues to build on its reputation as a stylish compact sedan with roominess and amenities, responsive, fun-to-drive performance and unexpected versatility.  Sentra is offered in 2.0, 2.0 S, 2.0 SR (with sporty exterior and interior styling features) and 2.0 SL models, each equipped with a standard 140-horsepower 2.0-liter 4-cylinder engine that can be paired with a  6-speed manual transmission (2.0 only) or fuel-efficient Nissan Xtronic CVT? (2.0, 2.0 S, 2.0 SR and 2.0 SL).
For 2010, Sentra receives a number of model, option, content and styling changes, including revised headlights and taillights for all models, a new grille and front fascia for 2.0, 2.0 S and 2.0 SL models and new interior fabrics on all trim levels.  As part of the interior refinements, leather-appointed seating on the 2.0 SL is offered as an optional package, giving customers greater flexibility when selecting the popular SL trim.  In addition, a 4.3-inch color display audio head unit with iPod® and Bluetooth® controls is standard on the 2.0 SL,  and a new optional Navigation Package is offered for the first time that can also be paired with an available RearView Monitor. 
Other enhancements for 2010 include the addition of the popular Convenience Package as an option for the 2.0 SR model, while the Sentra 2.0 SL adds standard Vehicle Dynamic Control (VDC) and Traction Control System (TCS).  Wheel designs have also been revised for 2010.  Three new exterior colors are also offered for 2010 – Anodized Orange, Espresso Black and Aspen White.  Sentra is again available with a range of unexpected amenities – ranging from the luxury of leather-appointed seating to the convenience of Nissan’s Intelligent Key™ keyless entry system.

About the 2010 Sentra SE-R
Once again in 2010, the Sentra SE-R and SE-R Spec V offer great value-for-performance, including the SE-R Spec V’s power-to-price ratio of 200 horsepower for around $20,000 USD.  Both the SE-R and SE-R Spec V are powered by Nissan’s advanced 2.5-liter 4-cylinder engine (QR25DE).  The SE-R is rated at 177 horsepower and the Sentra SE-R Spec V at 200 horsepower. 
Both models are again equipped with a range of unique (versus non-SE-R Sentra models) performance-oriented equipment and features, including 17-inch aluminum-alloy wheels, 4-wheel disc brakes with Anti-lock Braking System (ABS), Vehicle Dynamic Control (VDC), Traction Control System (TCS) and specially tuned suspension (SE-R Spec V), as well as unique exterior and interior appearance modifications.
SE-R and SE-R Spec V enhancements for 2010 include new sport cloth seat trim and stitching, revised instrument panel accents and illumination, revised headlight and taillight designs, a revised wheel color, a new 4.3-inch color audio system display with USB interface, standard Interface System for iPod® and available Nissan Navigation System.  Two new exterior colors are available: Anodized Orange and Aspen White.
New or revised option packages include the SE-R Upgrade Package, with power moonroof, Nissan Intelligent Key™, XM® Satellite Radio, RearView Monitor and 8-speaker 340-watt Rockford Fosgate audio system; and the Spec V Upgrade Package, which adds a Helical Limited-Slip Differential to the contents of the SE-R Upgrade Package (intelligent key deleted). The SE-R and SE-R Spec V again offer a long list of standard safety features, including six air bags.

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 Model   2009 MSRP   2010 MSRP  MSRP Reduction
 2.0 CVT   $16,730   $16,600  $130
 2.0 S CVT   $17,760   $17,160  $600
 2.0 SR   $17,760   $17,160   $600
 2.0 SL   $19,660   $18,560   $1,100
 SE-R   $20,660   $19,580   $1,080
 SE-R Spec V   $21,160   $20,080   $1,080


Source: Nissan