1. Introduction
“Going green” seems to be a string of journeys towards a sustainable world [
1]. Yet, the dependence on energy intensity around the globe increases the chances of environmental degradation over time. As reported by the International Energy Agency (IEA), the emission of carbon dioxide is viewed as one of the largest contributors to climate change, of which two-thirds is dominated by the transportation sector [
2]. Within this figure, cars accounted for the largest amount of energy consumption. Thus, the agency suggested that fuel economy could improve the efficiency of energy use for vehicles, and eventually reduce the statistics of fuel combustion emissions of the world [
3]. Therefore, the need to satisfy the vision of energy-efficiency, especially in the transportation sector, should draw the concern of every country to embrace fuel-efficient vehicles.
As reported by the International Organization of Motor Vehicle Manufacturers (OICA), the production of cars is growing globally over time, which reflects that the demand for this mode of transport has never withered [
4]. Consequently, car makers need to adopt cleaner powertrain systems as a viable response to the challenges of mitigating fuel combustion emissions. To this end, the deployment of hybrid cars is viewed as a promising way of addressing the aforementioned circumstances to achieve an energy-efficient transportation system [
5]. Hybrid cars are different from conventional cars, mainly in terms of the degree of carbon emissions, with hybrid cars promising lower carbon emissions [
6]. Hence, hybrid cars seem to be one of the feasible alternatives for reducing dependence on energy-intensive transport and improving the efficiency of transport energy.
Though the aim of improving the efficiency of transport energy is unhesitatingly deemed to be realistic, it still remains to be achieved, as the statistic of hybrid cars’ adoption is still far behind the adoption of conventional cars globally. This can be proven by the statistics produced by the IEA, which indicate the market share of environment-friendly cars is still comparatively small, compared with conventional cars [
7]. Even though there are still many countries with a low level of adoption of hybrid cars, the market share of those green cars is steadily showing a positive expansion. European countries remain the world’s highest in market share of hybrid cars, while China is the only country representing Asia with a sizeable market share of hybrid cars and is one of the key players in hybrid vehicle adoption globally [
3]. From the perspective of Malaysia’s automotive market, the adoption of energy-efficient vehicles is still at a relatively low rate, in line with the green trend in Malaysia, which is still in an early phase [
8].
In Malaysia, electrified vehicles are still in the early stage of adoption, and technology acceptance is not as notable as represented in other developed countries such as the United States and Europe [
3,
8,
9]. In reality, the infrastructures and facilities of these electrified vehicles are still not entirely developed to be easily accessible in different areas within the country [
10,
11]. The access towards charging infrastructures and facilities is still limited to certain metropolitan areas. Commercial-wise, battery electric vehicles (BEVs) are available in limited numbers (e.g., Nissan Leaf, Renault Zoe, BMW i3), and their prices are well beyond the reach of the mass consumers in the country. Hence, any research attempts to gauge BEVs’ adoption will not produce accurate results that reflect the reality of the current situation.
While BEVs promise a greener environmental impact than hybrid electric vehicles (HEVs) and plug-in hybrid vehicles (PHEVs), the short span of BEVs’ battery life can potentially cause impractical driving experience owing to the under-developed charging infrastructures and facilities in the country [
12,
13]. Hybrid cars are primarily introduced as vehicles that are operated with more than one means of propulsion instead of the sole means of engine propulsion [
9]. In this regard, a hybrid car is designed to be powered by a fuel combustion engine along with an electric motor. In the Malaysian context, the HEV market is generally occupied by mainstream brands such as Honda and Toyota. In contrast, the PHEV market is dominated by premium brands like BMW and Mercedes, considering its higher cost structure. Thus, hybrid technology—rather than BEV technology—appears to strike the right balance between driving convenience and purchasing ability among Malaysian car buyers, given the immaturity of the existing charging infrastructure.
The dismal statistic of hybrid car adoption globally might trigger several questions and is definitely something of a compelling phenomenon. Why are the global statistics of hybrid car adoption still lagging behind as compared with conventional cars? Are hybrid cars not competitive enough to win the hearts and minds of consumers? Are hybrid cars not promising enough to convince car users to make the transition from conventional cars to ecological cars? Or, do car users have their own preferences in adopting the vehicles? The list goes on. The game is changing; it is crucial to connect the missing dots. In this respect, the authors of [
14] propose that the adoption rate of hybrid cars can be increased if the appropriate understanding is strengthened in terms of both pros and cons. Thus, the driving factors influencing hybrid car adoption can be examined in order to increase the adoption rate. On the other note, the motivation for purchasing a hybrid car is not only limited to an environmental-preservation motive. The adoption of a hybrid car can be triggered by a broad motivational factor, including economic consideration [
15]. In this respect, while pro-environmental behaviors are viewed as primary drivers of ecological preservation, fuel-efficiency of hybrid technology grants an exceptional economic value that may develop individuals’ motivation to own hybrid vehicles [
16].
Nevertheless, Malaysia imposes a relatively higher tax structure for foreign-based manufacturers, and both of its national car makers do not offer any hybrid models. For instance, Honda’s hybrid models are costlier to own and maintain than its conventional petrol-powered variants, even with some equipment downgrade. Thus, the economic value of hybrid vehicle ownership is not considered to be factored into our study’s proposition.
On the basis of the above discussion, this study intends to examine the factors that drive consumers’ intention to purchase hybrid cars. This study embraces the Theory of Planned Behavior (TPB) as its underpinning theory to gauge people’s attitude, social pressures, and self-control towards purchase behavior. Moreover, environmental knowledge is integrated into the model to explain the ecological behavior of decarbonising the transportation system.
6. Discussions
To recapitulate, this study examines the factors influencing the intention of car users to purchase a hybrid car. The factors examined in assessing their influence on the intention to purchase a hybrid car were developed based on the Theory of Planned Behavior (green purchase attitude, subjective norms, and perceived behavioural control) as well as one additional variable (environmental knowledge). The regression analysis undertaken across a sample of 256 respondents confirmed that perceived behavioural control and environmental knowledge significantly influence people’s intention to purchase hybrid cars. On the basis of the regression analysis report, the most salient predictor influencing the intention to purchase a hybrid car is perceived behavioural control. Thus, the result indicates that the intention to purchase a hybrid car can be highly dependent on an individual’s perceived behavioural control. This result is consistent with previous studies by [
73] and [
60], which found that individuals’ perceived behavioural control effectively influences their willingness to pay for purchasing hybrid cars, notably when they are capable of buying these innovative environment-friendly cars.
As articulated by [
74], the new technology of hybrid vehicles involves several constraints pertaining to the adoption decision, such as the adoption’s ease or difficulty, and the affordability and availability of the vehicles. Thus, the researchers stated that the actual behavioural control of the individuals can be increased when they have better control over their resources, including the financial perspective. On top of that, the authors of [
75] justified that the higher the individuals’ financial capacity, the higher the individuals’ actual behavioural control; hence, they may have higher potential for adopting hybrid vehicles.
The regression analysis also reported that the additional variable added into the study model, which is environmental knowledge, exhibits a significant influence on the intention to purchase a hybrid car. The result indicates that environmental knowledge plays a vital role in influencing individuals’ intention to purchase a hybrid car. Similarly, previous studies conducted by [
76] and [
37] found that in nurturing the adoption of energy-efficient cars, environmental knowledge plays a remarkable role in fostering the purchase decision. The authors of [
77] stated that individuals with significant knowledge about the impacts of unsustainable behaviours on environmental wellbeing would be more open to adapting to energy-efficient technology, even though it is something new to them. Exposure to the benefits of mitigating carbon emissions from transportation can enhance individuals’ environmental knowledge, and lead to the development of ecological awareness, which ultimately fosters enthusiasm towards green transportation adoption [
78]. Not only that, but environmental knowledge is significantly able to drive individuals’ willingness to pay for sustainable transportation to mitigate carbon emissions from private vehicles [
79]. The result clearly demonstrates the significance of environmental knowledge in influencing individuals’ intention to adopt green vehicles. Thus, having said that, limited knowledge regarding the environmental wellbeing would constitute a barrier among individuals to environment-friendly behaviour [
80].
In spite of that, green purchase attitude is incapable of exerting any significant influence towards hybrid cars’ purchase intention, implying that the attitude towards ecological buying behaviour does not determine individuals’ intention to purchase hybrid cars. Accordingly, as hybrid technology is regarded as innovative technology as compared with conventional vehicles, it is considered new to be adopted, which may lead to doubtful perceptions in terms of the vehicles’ performance and attributes [
81]. As Malaysians are unfamiliar with hybrid cars and their knowledge is limited, most of them are naïve and clueless on its potential benefits and long-term running costs. This leads to negative attitudes among individuals on the evaluation of whether to purchase green technology vehicles. Moreover, the higher price of hybrid cars as compared with conventional cars also leads to the negative attitude of individuals towards the adoption decision, which overrides the green attributes offered by hybrid vehicles [
82]. Hence, saliently, a positive attitude towards individuals’ intention to purchase a hybrid car depends upon the value that they perceive in the ecological vehicles [
83].
Subjective norms also reported an insignificant influence on the intention to purchase a hybrid car. This is in accordance with a research finding by [
37], which implied that individuals’ decision to adopt hybrid cars is not determined by other people’s influences; instead, the adoption decision is more vulnerable to influence by other factors, such as environmental awareness, financial ability, or the vehicles’ performance. In contradiction to this, a research finding by [
84] found that subjective norms play a significant role in influencing individuals’ intention to purchase hybrid cars, as positive opinions shared among them increase their likelihood to be influenced. However, though adopting energy-efficient vehicles to reduce carbon emissions is an altruistic societal symbol and influence, it is insufficient to convince people to develop their intention in terms of monetary sacrifice and their willingness to pay [
29]. Besides, the integration of environmental knowledge into the model nullifies the significance of subjective norms in predicting the purchase intention of hybrid cars, as shown in
Table 5. This result indicates that people are putting more trust in their self-acquired environmental knowledge that carries more authenticity than the opinions of their reference groups. To summarize, this study confirmed that the pressure or influence of social circles is not an important determinant that influences individuals’ intention to purchase a hybrid car.
7. Conclusions, Implications, and Future Research Directions
Our dependence on the transportation system is high, especially on private vehicles, which jeopardizes environmental wellbeing as time passes. Therefore, the adoption of hybrid vehicles is considered to be one of the best alternatives for reducing the emissions of cars equipped with internal combustion engines. In this paper, a research model based on the Theory of Planned Behavior (green purchase attitude, subjective norms, and perceived behavioural control), which is integrated with environmental knowledge, was applied to examine the factors influencing individuals’ intention to purchase a hybrid car. The main findings, based on the regression analysis, confirmed that green purchase attitude and subjective norms have an insignificant influence on individuals’ intention to adopt hybrid cars. Instead, individuals’ intention to buy environment-friendly vehicles is more susceptible to being influenced by perceived behavioural control and their environmental knowledge.
The study found that the most influential determinant of the intention to purchase hybrid cars is when individuals perceive themselves as having better control over their resources and believe they are capable of adopting hybrid cars. Environmental knowledge was found to be the second salient factor influencing individuals’ intention to purchase hybrid cars. This finding confirms that the knowledge individuals possess regarding the impacts of carbon emissions from transportation on environmental wellbeing will reinforce their intention to purchase a hybrid car.
The integration of the Theory of Planned Behavior and environmental knowledge constitutes the theoretical novelty of this study. The integration of environmental knowledge into the Theory of Planned Behavior enriches the value of the extant literature by augmenting the explanatory power of predictors that influence pro-environmental vehicles’ purchase intention [
13]. Studies have indicated that the value of environmental knowledge in affecting individuals’ environmental actions is significant and meaningful [
35,
85]. Environmental knowledge plays a vital role in guiding individuals in their pro-environment decision-making process. Correspondingly, in the state of insufficient knowledge, the practice of ecological behavior might not be preferred [
35].
Practically, in respect of promoting the adoption of energy-efficient cars, it is vital to study what may shape individuals’ motivation in adopting the vehicles. Therefore, approaches can be executed accordingly by various parties, including governments, manufacturers, and marketers. On the basis of the results of this study, we derive several key implications for governments and practitioners to escalate the uptake of hybrid cars among consumers. Firstly, considering the negative role of green purchase attitude on the intention to purchase hybrid cars, several specific approaches should be implemented to minimize the individuals’ negative perception of buying pro-environmental vehicles. Promoting and highlighting the values of hybrid cars are regarded as effective ways of cultivating individuals’ acceptance of hybrid cars’ adoption. For example, the attributes, performance, and other values of hybrid cars can be introduced by hybrid cars’ manufacturers and relevant government agencies through multiple mediums that can reach the consumers (e.g., billboards, television shows, newspapers, and the Internet). These approaches will attract the public’s attention and understanding of pro-environmental vehicles’ adoption.
Next, given the non-significant effect of subjective norms towards the intention to purchase hybrid cars, practitioners and government bodies may work together to increase the effectiveness of social influence towards hybrid cars’ adoption. The endorsement of public figures (e.g., celebrities) on hybrid cars’ adoption can be executed to create a meaningful social pressure on the public in adopting pro-environmental vehicles. Lastly, as perceived behavioral control and environmental knowledge exhibit a positive influence on hybrid cars’ purchase intention, some measures can be implemented by governments and automotive marketers. The government should enact policies that promote the provision of financial incentives (e.g., tax reduction and rebate program) to benefit the hybrid cars’ purchasers. Therefore, individuals’ motivation to own the vehicles can be shaped accordingly. On top of that, concerning the significant influence of environmental knowledge, educating the public concerning the ecological impacts of green vehicles’ adoption is essential. In this instance, the related government bodies and automotive firms may create environmental awareness programs to expose the public on environmental knowledge. For example, specific environmental courses can be integrated into the formal education system (e.g., schools and universities). Hence, individuals will be exposed to environmental knowledge from a young age, which eventually guides them towards sustainable consumption actions.
Overall, despite the research findings, some improvements can be made concerning the limitations of this research. Hence, we propose several key points in regard to future research directions. First, the sample size could be expanded in future research so that generalizability can be enhanced. Researchers may also expand research across different national and regional contexts to have a better grasp of the overall phenomenon. Second, the current study examines the extent of individuals’ intention to purchase hybrid cars. Therefore, future research can expand the study model to the extent of actual buying behaviour of individuals in purchasing hybrid cars. This type of investigation can be performed through a longitudinal two-wave survey procedure. Third, as the method of collecting the data of this research is fully based on an online, self-administered survey, the respondents’ honesty and level of understanding in answering the questionnaire could not be guaranteed. Hence, considering another data collection technique for future research could enhance the quality of the data. Fourth, the moderate level of R2 value of the current study indicates that there are predictors that are not covered in examining individuals’ intention to purchase hybrid cars. Therefore, future research could explore different variables to enhance the model, which ultimately will better explain the variance of the study. For instance, brand equity [
86] and consumption values [
87] could be proposed as potential predictors of individuals’ intention to adopt hybrid cars.