ERROR TypeError: this.veiculo is undefined` no Angular 13

Programação
#1

Boa tarde, eu to fazendo um crud com o Angular 13, ele faz todas as funções de um crud, menos a de atualizar, quando clico no botao que chama a função pra atualizar, ele da esse erro: ERROR TypeError: this.veiculo is undefined.
Estou fazendo o front pelo Angular 13 e usando uma api feita em Java com SpringBoot.
Segue o codigo:

veiculo-atualiza.component.ts

import { Component, OnInit } from '@angular/core';
    import {
      FormBuilder,
      FormControl,
      FormGroup,
      Validators,
    } from '@angular/forms';
    import { MatDialogRef } from '@angular/material/dialog';
    import { MatSnackBar } from '@angular/material/snack-bar';
    import { Veiculos } from '../models/veiculos';
    import { VeiculoService } from '../services/veiculo.service';
    import { VeiculoAddComponent } from '../veiculo-add/veiculo-add.component';
    
    @Component({
      selector: 'app-veiculo-atualiza',
      templateUrl: './veiculo-atualiza.component.html',
      styleUrls: ['./veiculo-atualiza.component.css'],
    })
    export class VeiculoAtualizaComponent implements OnInit {
      public veiculoForm!: FormGroup;
      veiculo!: Veiculos;
    
      constructor(
        private fBuilder: FormBuilder,
        private dialogRef: MatDialogRef<VeiculoAddComponent>,
        private service: VeiculoService,
        private snackBar: MatSnackBar
      ) {}
    
      ngOnInit(): void {
        this.veiculoForm = this.fBuilder.group({
          placaOriginal: new FormControl(
            this.veiculoForm ? this.veiculoForm.get('veiculo.placaOriginal') : '',
            [Validators.required, Validators.minLength(7)]
          ),
          placaFria: new FormControl(
            this.veiculoForm ? this.veiculoForm.get('placaFria') : '',
            [Validators.required, Validators.minLength(7)]
          ),
          modelo: new FormControl(
            this.veiculoForm ? this.veiculoForm.get('modelo') : '',
            Validators.required
          ),
          marca: new FormControl(
            this.veiculoForm ? this.veiculoForm.get('marca') : '',
            Validators.required
          ),
          ano: new FormControl(
            this.veiculoForm ? this.veiculoForm.get('ano') : '',
            Validators.required
          ),
          numeroProcesso: new FormControl(
            this.veiculoForm ? this.veiculoForm.get('numeroProcesso') : '',
            Validators.required
          )
        });
      }
      onCancel(): void {
        this.dialogRef.close();
      }
    
      onUpdate(): void {
        this.service.update(this.veiculoForm.value, this.veiculo.id).subscribe(
          () => this.onSuccess(),
          () => this.onError(),
          () => window.location.reload()
        );
        this.dialogRef.close();
      }
    
      private onSuccess() {
        this.snackBar.open('Veículo atualizado com sucesso!', '', {
          duration: 3500,
        });
      }
      private onError() {
        this.snackBar.open('Erro ao atualizar veículo!', '', { duration: 3500 });
      }
    }

veiculo-atualiza.component.html

<h1 mat-dialog-title>Atualizar Veiculo</h1>
    <div mat-dialog-content>
      <form (ngSubmit)="onUpdate()" class="example-form" [formGroup]="veiculoForm" #formDir="ngForm">
        <mat-form-field class="example-full-form">
          <mat-label>Placa Original</mat-label>
          <input matInput formControlName="placaOriginal" name="placaOriginal" maxlength="7" minLength="7" />
        </mat-form-field>
        <mat-form-field class="example-full-form">
          <mat-label>Placa Fria</mat-label>
          <input matInput formControlName="placaFria" name="placaFria" />
        <mat-form-field class="example-full-form">
          <mat-label>Modelo</mat-label>
          <input matInput formControlName="modelo" name="modelo" />
        </mat-form-field>
        <mat-form-field class="example-full-form">
          <mat-label>Marca</mat-label>
          <input matInput formControlName="marca" name="marca" />
        </mat-form-field>
        <mat-form-field class="example-full-form">
          <mat-label>Ano</mat-label>
          <input matInput formControlName="ano" name="ano" />
        </mat-form-field>
        <mat-form-field class="example-full-form">
          <mat-label>Numero do Processo</mat-label>
          <input matInput formControlName="numeroProcesso" name="numeroProcesso" />
        </mat-form-field>
        <div mat-dialog-actions>
          <button mat-raised-button class="button btn btn-primary">
            Atualizar
          </button>
          <button mat-raised-button class="button btn btn-warning" (click)="onCancel()">
            Cancelar
          </button>
        </div>
      </form>
    </div>

veiculo.setvice.ts

import { HttpClient } from '@angular/common/http';
    import { Injectable } from '@angular/core';
    import { Observable } from 'rxjs';
    
    import { Veiculos } from '../models/veiculos';
    
    @Injectable({
      providedIn: 'root',
    })
    export class VeiculoService {
      private readonly API = 'http://localhost:8080/api/veiculos';
    
      constructor(private httpClient: HttpClient) {}
    
      list() {
        return this.httpClient.get<Veiculos[]>(this.API);
      }
    
      save(veiculo: Veiculos) {
        return this.httpClient.post<Veiculos[]>(this.API, veiculo);
      }
    
      delete(id: number): Observable<any> {
        return this.httpClient.delete<any>(`${this.API}/${id}`);
      }
      update(veiculo: Veiculos, id: number): Observable<Veiculos[]> {
        return this.httpClient.put<Veiculos[]>(`${this.API}/${id}`, veiculo);
      }
    }

Agradeço desde já