A manufacturer of motor homes has agreed to a nationwide recall after two deaths were attributed to carbon monoxide buildup caused by an unvented furnace, the government said yesterday.

The unit being recalled is a 26-foot 1979 Swinger motor home manufactured by Georgie Boy Projects Inc. of Elkart, Ind. Ken Weaver, an attorney for the company, said the company knows of only one defective vehicle but is "recalling all of the 1979 models to be on the safe side." Hal Parris of the National Highway Traffic Safety Administration said the agency hasn't yet received the company's written statement of the recall, which would say how many motor homes are covered by the cell.

His statement came after the Center for Auto Safety asked the agency to order a recall "in view of the enormous potential for fatal carbon monoxide poisoning."

Chrysler Corp. is recalling 75,000 1978 and early 1979 vans, sport wagons and motor home chassis that could lose braking or steering control.

The company said yesterday that brake hoses on some 47,500 1978-model Sportsman and Voyager wagons, vans, Commercial Kary Vans and motor home front selections could be damaged by rubbing against the front tire, resulting in loss of brake fluid.

'If hose said it received 14 reports of front wheel braking loss due to the problem resulting in one minor accident but no injuries.

Dealers will replace the brake hose and install a protective hose bracket free of charge, the company said.

Chrysler also is recalling 27,500 early 1979 models of the same vehicles to bolster a front suspension lower control arm that could fracture, resulting in loss of steering control.

The firm said it received one report of control arm failure but no personal injury resulted.

Volvo of America Corp. is expanding a recall of cars for fuel system changes to cover an additional 121,000 of its 1974 and 1975 models. earlier this year, the importer recalled late 1975, 1976 and some 1977 models for the same change.

A "small number" of fuel tanks of cars involved in the latest recall "may contain a defect which could result in a small fuel wetting in the drain plug flange area of the fuel tank," Volvo said.

If necessary, the entire tank will be replaced, Volvo said.

The company said it knew of no accidents in which the drain plug flange area was involved.

Ford Motor Co. is recalling about 4,750 1979-model Ford Mustangs and Mercury Capris for possible repair of plastic guard which protects the engine fan.

The fan guard could come in contact with the fan if the engine is raced with the hood up, said John P. King, manager of the Ford service engineering office. No problems have been reported by owners of the cars and the defect was found in assembly line testing, he said.

Cars affected by the recall are equipped with 200-cubic-inch, 6-cylinder engines without air conditioning.

Ford and Mercury dealers will install additional supports and fasteners without charge. Owners will be notified by mail, King said.

A national chain of import stores is recalling African necklaces because they contain a bean than can be fatal it eaten.

A spokesman for Pier 1 Imports said the necklaces contain the toxic reddish-orange jequirity bean.

About 3,000 of the colorful African necklaces had been sold nationwide, but only 300 to 500 contained the jequirity bean.

A company representative said an adult might inadvertently chew or suck on the necklace and added "Children could be attracted because it is colorful."

Pier 1 bought the necklaces from an african importing firm, Compra Inc. of Ashville, N.C., he said. He said dangerous materials usually are stopped by customs officials, but somehow these were distributed.

The company said it learned of the danger when Maryland authorities notified it. No illnesses or fatalities from the necklaces have been reported.

General Motors was ordered to recall 67,000 Chevettes, bringing the total number of 1979 Chevettes recalled to 107,000.

The Environmental Protection Agency said the cars violated federal clean air standards by emitting 29 percent more carbon monoxide than allowed by the law, which limits carbon monoxide emmissions to 15 grams per mile.

Cars affected by EPA's lates order are equipped with an automatic transmission and a standard 1.6 liter engine.

The earlier recall affected Chevettes with an automatic transmission and a so-called "high output" 1.6 liter engine.