OPINION
I. Introduction
The sole issue we address in this appeal is whether Appellants Pete and Marcella Everett alleged an injury sufficient to establish their standing to assert certain causes of action on their own behalf and on behalf of “[a]ll persons who own a vehicle equipped with TK-52 Buckles ... that is registered in Texas, except those persons who have made claims against any defendant for personal injury damages allegedly arising out of seatbelt malfunction” or whether, as asserted by the defendant Ap-pellees, 1 the Everetts lack standing indi *849 vidually and as class representatives because they have suffered no injury that is redressable through their pleaded claims. The trial court granted Appellees’ motions to dismiss the statewide class action lawsuit after determining that the Everetts lacked standing because they had not alleged an injury in fact. Because no allegations exist that the TK-52 seat belt buckles in Marcella’s 1991 Isuzu Rodeo or in Pete’s 1994 Nissan pickup have malfunctioned, because Pete does not seek to recover personal injury damages that he allegedly suffered from a TK-52 seat belt, and because neither Marcella nor Pete has alleged an economic injury that is redress-able through their pleaded claims, we hold that the trial court did not err by dismissing the Everetts’ claims for lack of standing. Consequently, we will affirm the trial court’s judgment.
II. Factual and Procedural Background
The Everetts sued the defendants based on the production and sale of defective TK-52 buckles, ultimately alleging causes of action for breach of warranty, fraudulent concealment, violations of the Texas Deceptive Trade Practices Act (“DTPA”), constructive trust, money had and received, and exemplary damages. The Ev-eretts pleaded that their vehicles, a 1994 Nissan pickup owned by Pete and a 1991 Isuzu Rodeo owned by Marcella, came factory-equipped with TK-52 buckles. 2 Although Pete alleges that he was physically injured by a defective Takata seat belt buckle, 3 he specifically does not seek damages in this suit for those physical injuries. According to the pleadings, Marcella’s seat belt buckles have not failed or caused her physical injury.
The Everetts alleged that Takata supplies the TK-52 buckles to its manufacturer customers and that Takata knew as early as the pre-production phase of the TK-52 buckles that the buckles — by virtue of a defective design — were susceptible to partial engagement, leaving the seat belt user essentially unrestrained. The Ever-etts pleaded that after a Honda Accord crash test documented the TK-52’s partial engagement problem, Takata admitted a design defect existed and represented that it had developed a corrective countermeasure that would be incorporated into future TK-52 buckles. Several recalls issued concerning the defective buckles, but the Everetts maintain that not all of the defective buckles were recalled and that a substantial number of the buckles with identical defective internal design remain in use today, presenting an unreasonable risk of harm to users by virtue of the buckles’ propensity to partially engage. The Ever-etts, on their own behalf and as class representatives, alleged economic injury damages, arguing that purchasers of vehicles fitted with the TK-52 buckles did not *850 receive the benefit of the bargain that they made in the purchase of their vehicles and will suffer $500 per vehicle cost-of-replacement damages.
The defendants filed answers and numerous motions, including motions to dismiss for want of jurisdiction. Following a nonevidentiary hearing, the trial court dismissed the Everetts’ claims, stating that the Everetts “lack standing to pursue this action because they have not alleged that they have an ‘injury in fact.’ ” 4 The Ever-etts appeal from this dismissal judgment.
III. Standard of Review
Subject matter jurisdiction is essential to the authority of a court to decide a case.
Tex. Ass’n of Bus. v. Tex. Air Control Bd.,
IV. Common law Standing and Statutory Standing
Standing to sue may be predicated upon either statutory or common law authority.
See, e.cj., Williams v. Lara,
V. The Parties’ Positions
The Everetts argue that they alleged an injury in fact — an economic injury — by pleading that their TK-52 buckles are defective, are not effective restraints, pose serious safety risks, and have caused them concrete economic damages in the form of loss of the benefit of their bargain in purchasing their vehicles and the prospective cost of replacing the defective buckles. The defendants claim that the trial court correctly determined that the Everetts lacked standing because the Everetts have suffered no injury in fact. In addition, the Takata defendants argue that the Everetts lack standing because their suit is a de facto Federal Safety Act enforcement action. 5 Isuzu separately argues that the Everetts have faded to allege any failure in any Isuzu product because the seat belts in Marcella’s Isuzu Rodeo have not manifested any defect; thus, the Everetts do not have standing to pursue any cause of action against Isuzu.
VI. The Everetts Pleaded an Unmanifested Defect
The Everetts’ live pleading, their second amended original petition, seeks recovery of economic damages — loss of benefit of the bargain and cost of replacement damages — for the “defective” seat belt buckles installed in their vehicles. They pleaded that the TK-52 buckles “all have the same manufacturing defect,” which is “inherent in the design of the buckle, in that it may only partially engage under ordinary usage conditions” and “may release during a collision.” 6 They further alleged that deviation from manufacturing specifications “increases the propensity for TK-52 Buckles to engage only partially.” According to the Everetts, consumers complained to the National Highway Traffic Safety Administration about the “inherently defective design of the TK-52 Buckles and its propensity to partially engage in actual use,” but the defendants mischaracterized these complaints as related to chipped ABS plastic release buttons. Takata allegedly has known that under a variety of actual use conditions “partial engagement can occur.”
The Everetts do not plead that the TK-52 buckles in their vehicles have ever partially engaged when they attempted to latch them nor do they plead that the buckles have provided them with insufficient restraint or have come unlatched while they were driving. They likewise do not plead that in an accident or under stress the buckles will inevitably fail. Thus, they have pleaded that an unmani-fested defect — a propensity to partially latch and to thereby provide insufficient restraint — exists within the TK-52 buckles in their vehicles.
Accord Gen. Motors Corp. v. Garza,
No. 04-03-00702-CV,
VII. Current Law Regarding Whether Economic Harm From an Unmanifest-ed Product Defect is an “Injury” Conferring Standing
We begin our analysis by drawing a distinction between manifested product defects and unmanifested product defects-like the one alleged by the Everetts— because most of the cases relied upon by the Everetts involve manifested defects, not unmanifested defects; therefore, those cases are not controlling.
See McManus v. Fleetwood Enters., Inc.,
The Texas Supreme Court has not yet addressed which claims, if any, a plaintiff possesses standing to assert based on an unmanifested product defect that causes only economic damages.
See Compaq Computer Corp. v. Lapray,
VIII. Application of the Law to the Everetts’ Pleadings
A. Breach of Implied Warranty of Merchantability
The Everetts’ second amended original petition purports to plead a cause of action against Appellees for breach of the implied warranty of merchantability.
8
See
Tex. Bus. & Com.Code Ann. § 2.314 (Vernon 1994). Because this is a statutory cause of action, we apply statutory standing principles. The statutory elements of the Everetts’ breach of implied warranty of merchantability are (1) that their vehicles’ seat belt buckles are defective as unfit for their purpose because of a lack of what was required for adequacy, (2) that the alleged defect existed when the buckles left the manufacturer’s and the seller’s possession, and (3) that the alleged defect proximately caused the injuries for which the Everetts seek damages.
See id.
§§ 2.314
&
cmt. 13, 2.607(c)(1), 2.714-.715; see
also Roventini v. Ocular Scis., Inc.,
In determining whether the allegations show that the defect caused injury, we recognize that the defect in an implied warranty of merchantability case may not be the same as the defect in a strict products liability case.
Plas-Tex,
The Everetts pleaded a breach of the implied warranty of merchantability cause of action, but they pleaded a products liability defect — a defective design of the buckle giving it a
“propensity
to partially latch and
potentially
provide insufficient restraint during a crash.”
10
[Emphasis added.] A product that performs its ordinary function adequately is not defective in the implied warranty of merchantability context simply because it does not function as well as the buyer would like, or even as well as it could.
Brewer,
Here, the Everetts’ vehicles are many years old; Pete’s Nissan truck is a 1994 model and Marcella’s Isuzu Rodeo is a 1991 model. Although the vehicles are over a decade old, the Everetts do not allege that the TK-52 buckles in their vehicles have ever only partially latched when they latched them or have ever provided them with insufficient restraint. They instead seek economic damages based on the “buckles’
propensity
to partially latch and
potentially
provide insufficient restraint during a crash.” [Emphasis added.] To cause redressable injuries in the breach of the implied warranty of merchantability context, a “defect” must either have manifested during the product’s normal use or such manifestation must be inevitable when the defective feature of the product is used — such as the software data compression feature in
Manning.
Instead, the Everetts have pleaded for contract-based damages from the alleged breach of the implied warranty of merchantability while alleging a tort-based products liability defect. This mixing of liability and damage theories does not establish an injury.
See Rivera,
The Everetts urge us to apply the analysis articulated by the Corpus Christi Court of Appeals in
Inman
and to hold that they
*856
have alleged an injury sufficient to establish standing.
See
We confront the standing issue directly and look to the statutory language governing a breach of the implied warranty of merchantability claim.
See Scott,
B. Fraudulent Concealment
*857
The Everetts pleaded fraudulent concealment. Fraudulent concealment is an equitable doctrine that provides a defense to the bar of limitations, and limitations are not at issue here in the trial.
See Mitchell Energy Corp. v. Bartlett,
C. DTPA
We apply the statutory standing analysis to determine whether the Ever-etts have pleaded facts establishing their standing to assert a DTPA claim. The DTPA prohibits “[f]alse, misleading, or deceptive acts or practices in the conduct of any trade or commerce.”
See
Tex. Bus. & Com.Code Ann. §§ 17.46(b)(5), (7), (13), (22), (24) (Vernon 2002 & Supp.2004-05), 17.50(a)(1) (Vernon 2002). To recover under the DTPA, the plaintiff must show that (1) he is a consumer, (2) the defendant engaged in a false, misleading, or deceptive act, and (3) the act constituted a producing cause of economic damages or damages for mental anguish.
See id.
§ 17.50(a)(1);
Doe v. Boys Clubs of Greater Dallas, Inc.,
The Everetts pleaded that they are “consumers” as defined in the DTPA. They pleaded that Appellees made various false representations concerning the TK-52 buckles directly to them and to all class members and that they and all class members relied upon these representations to their detriment. See id. §§ 17.46(b)(5), (7), (13), (22), (24), 17.50(a)(1). The Ever-etts pleaded that the alleged deceptive acts “were a producing cause of economic damages and injury to Plaintiffs and other Class members.” See id. § 17.50(a). Specifically, Pete and Marcella each alleged that they “did not receive the benefit of the bargain because the seat belts” in his *858 pickup and in her Rodeo, respectively, “are defective.”
The DTPA allows a plaintiff to recover for misrepresentation under the higher of the two common law measures of economic damages: either the “out-of-pocket” measure or the “benefit-of-the-bargain” measure.
See Arthur Andersen & Co.,
In a case with facts similar to the present facts, a group of plaintiffs sued a drug manufacturer for breach of the implied warranty of merchantability, for unjust enrichment, and for deceptive trade violations.
Rivera,
The Everetts’ pleading, like the plaintiffs’ pleading in
Rivera,
does not plead facts demonstrating the type of injury that is compensable under the DTPA.
12
So far, according to the Everetts’ pleadings, they have received the benefit of their bargain; they were promised and they received seat belt buckles that latched and provided sufficient restraint. Although the Everetts generally pleaded that the TK-52 buckles “are defective,” they have not identified in their pleading any way in which the TK-52 buckles in their vehicles performed differently from the way Appellees represented the buckles would perform. They have not pleaded characteristics or benefits that the seat belts were represented to have but did hot have. In other words, although allegedly defective, the TK-52 buckles in the Ever-etts’ vehicles have apparently functioned as represented for the past decade. Likewise, although the Everetts pleaded that it would cost $500 per vehicle to replace the TK-52 buckles, they have not pleaded facts demonstrating a failure that necessitates replacement and, indeed, they have not replaced the buckles in their vehicles. At some point, potential loss-of-benefit-of-the-bargain injuries and potential cost-of-repair or replacement injuries from a defect that has not manifested itself simply become too remote in time to constitute an “injury” for statutory standing purposes under the DTPA.
Accord Polaris,
We are aware that Florida has recognized a plaintiffs standing to bring suit for an unmanifested defect under that state’s equivalent of the DTPA.
15
See Collins,
D. Constructive Trust
A constructive trust is an equitable remedy used to prevent unjust enrichment.
Medford v. Medford,
We apply common law standing requirements to determine whether the Everetts possess standing to sue for imposition of a constructive trust. We are concerned only with whether the Everetts pleaded an injury that could be redressa-ble though an equitable action for a constructive trust. Some of the types of situations in which a constructive trust is appropriate are outlined in
Fitz-Gerald v. Hull,
E. Money Had and Received
Money had and received is an equitable action that may be maintained to prevent unjust enrichment when one person obtains money, which in equity and good conscience belongs to another.
J.C. Penney Co., Inc. v. Pitts,
F. Exemplary Damages
The Everetts’ pleadings for exemplary damages add nothing to our standing analysis. An exemplary damages claim will not stand alone; it depends on some pleaded liability claim.
See, e.g.,
Tex. Civ. PRAC. & Rem.Code Ann. § 41.004(a) (Vernon Supp.2004-05);
see also Fed. Express Corp. v. Dutschmann,
Taking as true the facts set forth in the Everetts’ second amended original petition, we hold that they have not pleaded any facts establishing an injury that is redressable through their breach of the implied warranty of merchantability, fraudulent concealment, DTPA, constructive trust, money had and received, and exemplary damages claims. Consequently, we hold that the trial court did not err by holding — following a nonevidentiary hearing on Appellees’ motions to dismiss— that the Everetts lack standing to assert these claims. We overrule the Everetts’ sole issue.
IX. Conclusion
Having overruled the Everetts’ sole issue, we affirm the trial court’s order dismissing this case for lack of subject matter jurisdiction.
Notes
. The named defendants in the underlying lawsuit are Takata Corp.; TK-Taito, L.L.C.; Takata Seat Belts, Inc.; American Isuzu Motors, Inc.; Isuzu Motors of America, Inc.; and Nissan North America, Inc. The appellate brief filed by TK-Taito, L.L.C. and Takata Seat Belts, Inc. ("the Takata defendants") indicates that Takata Corp. "has not been served and has not appeared in this action.” The appellate brief filed by Isuzu Motors America, Inc. states that it was improperly named as "Isuzu Motors of America, Inc.,’’ *849 that American Isuzu Motors Inc. no longer exists, and that Isuzu Motors America, Inc. is the successor in interest to American Isuzu Motors Inc. References herein to "the defendants” or to "the Takata defendants” refer only to those entities that were actually served and that are still in existence.
. The pleadings do not state when or where the Everetts purchased these automobiles or whether they were new or used when they were purchased. Nor was this information disclosed at the nonevidentiary hearing on Appellees’ motions to dismiss.
. The pleadings do not indicate whether Pete’s injury occurred from the failure of the TK-52 buckle in his vehicle or whether he was a passenger in a different vehicle when he received the injuries. The pleadings state, "Pete Everett owns a 1994 Nissan Pickup, which came factory-equipped with TK-52 Buckles. He was physically injured by a defective Takata seat-belt, due to the Defect described herein. He does not, however, seek damages for his physical injury."
. Before entering the dismissal order, the trial court explained its ruling in a letter to the parties and expressly rejected application of
DaimlerChrysler Corp. v. Inman,
Although the Plaintiffs’ [sic] put great stock in the 13th Court of Appeals'[s] opinion in Inman, I find that Court's analysis to be rather one-sided. The Court seems to go to great lengths to stretch Inman's claims of injury so that those claims become injuries in fact, thereby giving Inman standing in that case. I am neither willing nor able to do that in the instant case. Clearly, an actual injury— an injury in fact — is required in order for a Plaintiff to have standing to sue. As pointed out by Justice Jerry E. Smith, in Rivera v. Wyeth-Ayerst Laboratories, [283 F.3d 315 , 319 (5th Cir.2002),]"[m]erely asking for money does not establish an injury in fact.”
. Because we conclude that the Everetts have not pleaded facts establishing an injury that is redressable under the liability theories they have pleaded, we do not reach this alternative ground for the trial court’s dismissal. See Tex.R.App. P. 47.1 (stating that appellate court need only address every issue raised and necessary for final disposition of appeal).
. The emphasis in these quotes from the Ever-etts’ second amended original petition is ours.
. The supreme court heard argument in this case on January 6, 2005.
. The Everetts' reply brief, in places, characterizes their pleading as asserting a breach of the implied warranty of fitness for a particular purpose; but their second amended petition asserts only breach of the implied warranty of merchantability. Consequently, we do not analyze the Everetts' standing to assert a claim for breach of the implied warranty of fitness for a particular purpose.
. The supreme court in
Plas-Tex
expressly instructed, "Practitioners — as well as the courts- — -should exercise care to see that these terms [the different meanings of the term "defect” in breach of the implied warranty of merchantability cases versus products liability cases] are used precisely."
Id.
Subsequently, chapter 82 of the civil practice and remedies code was enacted, and it purports to utilize the term "defect” interchangeably when the suit is "against a manufacturer or seller for recovery of damages arising out of personal injury, death, or property damage allegedly caused by a defective product.” Tex. Civ. Prac. & Rem.Code Ann. § 82.001 (Vernon 2005);
see also Hyundai Motor Co. v. Rodriguez,
. The Everetts pleaded, in part, "Takata has known that under a variety of actual use conditions, that partial engagement can occur” and "Takata has allowed millions of TK-52 Buckles to be sold worldwide, all of which have an identical internal design, and all of which suffer from the same unreasonable risk." [Emphasis added.]
. Even if we were to construe the Everetts’ fraudulent concealment allegations as somehow pleading a cause of action for fraud, the unmanifested product defect they have pleaded is not redressable via a fraud claim.
See Tietsworth v. Harley-Davidson, Inc.,
[A]n allegation that a product is diminished in value because of an event or circumstance that might — or might not — occur in the future is inherently conjectural and does not allege actual benefit-of-the-bargain damages with the "reasonable certainty” required to state a fraud claim.
Id..; see also Novak,
. And, the hearing on Appellees’ motions to dismiss was a nonevidentiary hearing, so we are not able to look to evidence to fill in these factual gaps.
. The Polaris court explained,
Tires and cars have a distinctly limited usable life. At the end of the product's life, the product and whatever defect it may have had pass away. If a defect does not manifest itself in that time span, the buyer has gotten what he bargained for.
Id.
(quoting
Compaq Computer Corp. v. La-Pray,
. We do not hold that a consumer may never possess standing to bring suit under the DTPA for benefit-of-the-bargain damages based on an unmanifested product defect. We simply hold that, taking the Everetts’ pleadings as true, they have not pleaded facts demonstrating a statutory injury under the DTPA; they have not pleaded facts establishing the existence of economic damages, that is loss-of-benefit-of-the-bargain damages or cost-of-replacement damages.
. The Everetts provided us a copy of a California case holding that a plaintiff possesses standing to bring suit for an unmanifested defect in an action under that state’s equivalent of the DTPA, but we do not discuss it because it is an unpublished case and, consequently, in California it is of no precedential value and may not be cited.
Zavala v. TK Holdings, Inc.,
No. B168634,
