Washington Auto Repair Dispute Demand Letter
Washington has one of the more consumer-friendly auto repair statutes in the country. Chapter 46.71 RCW gives every customer a written-estimate right, a 110-percent cap on charges before further authorization is required, and (for many violations) a per-se hook into the Consumer Protection Act. If a Washington repair shop overcharged, did unauthorized work, or refuses to return replaced parts, the statute is the lever.
Quick answer
Under RCW 46.71.025, a Washington automotive repair facility may not charge more than 110 percent of the written estimate (exclusive of sales tax) without first obtaining the customer's oral or written authorization. Documentation of that authorization must include date, time, the additional cost, and the employee who obtained it. A charge that exceeds the 110-percent threshold without proper authorization is unauthorized, and the customer is generally not obligated to pay the excess. Violations of Chapter 46.71 RCW are also enforceable through the Consumer Protection Act, Chapter 19.86 RCW.
The Washington customer rights framework under Chapter 46.71 RCW
Written estimate requirement
Under RCW 46.71.025, a repair facility that performs repair work expected to exceed a statutory dollar threshold must provide the customer with a written estimate before beginning the work. The estimate must describe the labor and parts to be supplied. The facility may not charge more than 110 percent of the written estimate (exclusive of sales tax) without first obtaining the customer's authorization to exceed that amount.
Authorization to exceed
If during repair the facility determines that additional work is needed and the additional work will push the total above the 110-percent threshold, the facility must obtain authorization before doing the work. The authorization may be oral or written, but the facility's records must document the date, the time, the additional amount, and the identity of the employee who obtained the authorization. A facility that performs additional work without that documented authorization has performed unauthorized work, and the customer is generally not liable for the excess.
Required customer rights signage under RCW 46.71.031
Washington repair facilities must post a customer rights notice that informs customers of these basic protections. The statute sets specific size requirements for the signage and lists the items the notice must address, including written estimate rights, the 110-percent rule, the right to inspect or receive replaced parts on request, and the requirement that customer authorization be documented when repairs are performed without direct customer contact. A facility that does not post the required signage has, on the face of the statute, violated the regulatory scheme; that violation can be part of a broader CPA argument.
Replaced parts
A repair customer has the right to ask for the return or inspection of replaced parts. If the customer asks before the work, the shop must offer the parts back unless an exchange-core or warranty-return policy applies. Refusal to return parts on a proper request, especially when the parts would have evidentiary value in a billing dispute, is a poor look for the shop and a useful fact for a demand letter.
Invoice requirements
The final invoice must reflect what was actually done: labor performed, parts supplied (with notation of any reused, rebuilt, or refurbished parts where applicable), and the price for each. An invoice that does not match the estimate, or that does not match what the customer authorized, is the strongest piece of evidence in most Washington auto repair demand letters.
How the Consumer Protection Act fits in
Violations of Chapter 46.71 RCW are widely understood to be enforceable as per-se unfair or deceptive acts under the Washington Consumer Protection Act, Chapter 19.86 RCW. That matters because RCW 19.86.090 authorizes the prevailing plaintiff to recover actual damages, reasonable attorney fees, and discretionary treble damages capped at $25,000 for violations of RCW 19.86.020. The five-element Hangman Ridge framework still applies (unfair or deceptive act, in trade or commerce, public-interest impact, injury to business or property, causation), but per-se violations of consumer-protection statutes generally satisfy the first two elements without further showing.
Misdiagnosis vs unauthorized work vs fraud
Misdiagnosis
A repair shop diagnoses the wrong problem, performs work that does not fix the actual issue, and charges for the work. Misdiagnosis alone is usually a competence question, not a fraud question. The remedy is typically a refund or a credit toward the correct repair. If the shop refuses, the demand letter cites the implied warranty of workmanship and the contractual obligation to perform the work properly.
Unauthorized work
The shop performs work that was not authorized, or performs work that exceeded the 110-percent threshold without the documented authorization required by RCW 46.71.025. This is a statutory violation. The customer is generally not obligated to pay the unauthorized charges. The demand letter cites the statute, identifies the specific charges that exceed the 110-percent cap (or that fall outside the authorized scope), and demands a credit or refund.
Fraud
The shop charged for work that was not done, supplied used parts billed as new, or fabricated repair items. Fraud carries the three-year limitations period under RCW 4.16.080 with a discovery rule (the period runs from when the fraud was discovered or should reasonably have been discovered, not when it occurred). Fraud is a much stronger CPA case because the deception element is on its face.
Sample demand letter paragraph citing the statute
Demand letter checklist for Washington auto repair
- Copy of the written estimate, signed and dated.
- Copy of the final invoice, with line items.
- Calculation showing exactly how the invoice exceeds 110 percent of the estimate.
- Photos of the vehicle before and after the repair, if available.
- Photos of any replaced parts, if returned or inspected.
- The shop's posted customer rights notice (or photo of the absence of one).
- Any text or email exchanges where the shop did or did not seek authorization for additional work.
- Any second-opinion diagnosis or estimate from another shop, if obtained.
- Records of who at the shop you spoke with, when, and what was said.
Washington legal leverage
The single strongest leverage point in a Washington auto repair demand letter is the documentation gap. The statute requires the facility to document any oral or written authorization to exceed 110 percent of the estimate, with date, time, amount, and employee. If the facility cannot produce that documentation, the excess charges are facially unauthorized. Most shops have weak or non-existent records of these authorizations because they happen on the phone in the middle of a workday. The demand letter that asks for that documentation up front, in writing, often produces either a settlement or a record of refusal that strengthens a CPA claim later.
When to hire an attorney
Washington-specific auto repair work cannot be handled by me until Washington admission is complete. Until then I can help with educational triage, with California auto repair matters (California Civil Code 1796 and the California Bureau of Automotive Repair regulations), and with cross-jurisdictional matters that have a California or federal hook. For Washington-only auto repair matters, please add yourself to the Washington availability list and follow up after admission, or work with a currently-admitted Washington consumer attorney in the interim. Many Washington auto repair matters are small enough that small claims court (currently $10,000 for natural persons, with no attorney representation) is the cheapest forum to resolve them; the demand letter is then the pre-filing settlement step.
Related resources
- Washington Demand Letters hub for the full set of Washington demand letter pages.
- Washington Business Law hub for related Washington educational resources.
- California auto and lemon law demand letters for the California comparison.
- California Lemon Law demand letters for related California content.
Discuss a Washington auto repair dispute
Pre-admission posture. Washington-only matters can be added to the Washington availability list and followed up after Washington admission. Cross-jurisdictional matters with a California or federal hook can be handled now under my California license, with explicit Washington-coverage disclaimers.
Join the Washington availability list Schedule a $125 strategy call (CA-licensed) Email me about an auto repair dispute