Hi Terrence, I am pleased to assist you. You typically only need the solenoid itself. The housing is usually part of the engine block or another component and does not need to be replaced unless it is damaged. If the housing is damaged or corroded, you might need to address that separately. It's always a good idea to consult a repair manual or a professional mechanic if you're unsure. If your 2009 Nissan Altima is compatible with this product, use the link below to order while the part is in stock. I hope this helps, and enjoy shopping! https://www.carparts.com/variable-timing-solenoid/replacement/rn38080004?can=CPGG4850_CSQA_20250331

Hi Terrence, I am pleased to assist you. Yes, this variable timing solenoid is compatible with your 2009 Nissan Altima S, Base, and Hybrid 4 Cyl 2.5L. If your vehicle belongs to this group of submodels or trims, this solenoid should work effectively for your vehicle. You can use the link below to order while the part is in stock. I hope this helps, and enjoy shopping! https://www.carparts.com/variable-timing-solenoid/replacement/rn38080004?can=CPGG4850_CSQA_20250331

Hi Richard, thank you for reaching out. This product is incompatible with the 2013 Nissan Altima, which has a 2.5-liter engine. Click this link to order the suggested intake variable timing solenoid for a 2013 Nissan Altima sedan with a 2.5-liter engine at a discounted price today: https://www.carparts.com/details/Nissan/Altima/Dorman/Variable_Timing_Solenoid/2013/Base/4_Cyl_2-dot-5L/RB916922.html?can=CPAP3648_CSQA_20240812 I hope this helps. Happy shopping.

Hi Hushton, thank you for reaching out. The location of this product is at the variable timing cover, attached to the front cover of the timing chain on your 2012 Nissan Altima with a 2.5-liter engine. You can use this link to order the part and take advantage of our low price for this item: https://www.carparts.com/variable-timing-solenoid/replacement/rn38080004?can=CPAP3648_CSQA_20240629 I hope this helps. Happy shopping.

Hi Israel, I'm pleased to assist you. While replacing the Variable Timing Solenoid might address the P3434 code on your 2009 Nissan Altima 2.5L, it's not guaranteed to be the definitive solution, especially considering the additional symptoms of jerking and fluctuating RPMs during acceleration. The symptoms can be caused by various underlying issues and require professional diagnosis and repair. If you're still interested in this part, use the link below to continue ordering today while the part is in stock. I hope this helps and enjoy shopping! https://www.carparts.com/variable-timing-solenoid/replacement/rn38080004?can=CPGG4850_CSQA_20240208