| ECAR | Economy Car | 经济型轿车 |
| ECAR | Extra Cost Approval Request | 额外成本审批请求 |
| ECAR | Eastern Caribbean | 东加勒比海 |
| ECAR | U S Electricar, Inc. | 美国电动车公司。 |
| ECAR | European College for Animal Reproduction | 欧洲动物繁殖学院 |
| ECAR | East Central Area Reliability Coordination Agreement | 中东部地区可靠性协调协议 |
| ECAR | East Central Area Reliability | 中东部地区可靠性 |
| ECAR | European Campaign for the Freedom of the Automotive Parts and Repair Market | 欧洲汽车零部件和维修市场自由运动 |
| ECAR | Every Child a Reader (UK) | 每个孩子都是读者（英国） |
| ECAR | European College of Animal Reproduction | 欧洲动物繁殖学院 |
| ECAR | European Civil Aviation Requirement | 欧洲民用航空要求 |