The grades of four auto parts stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Cooper Tire & Rubber Company (CTB) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. Cooper Tire & Rubber produces and markets tires for passenger vehicles, light trucks, medium trucks, motorsports, and motorcycles that are sold in the replacement tire market. In Portfolio Grader’s specific subcategories of Earnings Momentum, Equity and Cash Flow, CTB also gets A’s. For more information, get Portfolio Grader’s complete analysis of CTB stock.

TRW Automotive Holdings (TRW) is seeing ratings go up from a B last week to an A this week. TRW Automotive Holdings is among the most diversified suppliers of automotive systems, modules and components to global automotive original equipment manufacturers and related aftermarkets. For more information, get Portfolio Grader’s complete analysis of TRW stock.

Autoliv (ALV) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. Autoliv supplies products related to automotive safety, including airbags and seatbelts. The stock has a dividend yield of 2.2%. For more information, get Portfolio Grader’s complete analysis of ALV stock.

Lear Corporation (LEA) earns a B this week, jumping up from last week’s grade of C. Lear produces seating systems, wiring harnesses, terminals, connectors, junction boxes, body control electronics, wireless products, and audio systems. For more information, get Portfolio Grader’s complete analysis of LEA stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.